NewStaining Software Engineer Associate - Contract TalentBurst, Inc.Staining Software Engineer Associate - ContractTucson, AZ$40–$55 / hourWe prefer a Bachelor s degree in Software Engineering, Computer Science, or other Engineering discipline; candidates with a background in Life Sciences (Biology, Chemistry) will also be considered. You will create software supplements to install these procedures, manage the underlying database elements required to support them within our applications, and ensure all deliverables are executed on time.
X-Midas Software Engineer Top EngineerX-Midas Software EngineerTucson, AZIn this role, you will develop and optimize software frameworks for advanced SIGINT systems, working across hardware control, GUI design, database development, and core signal processing algorithms. CompanyConfidential Employer LocationTucson, Arizona, USA IndustryDefense CompensationDOE Employment TypeFull Time/Direct Hire Remote StatusNo Remote Total Openings1 Work Experience5 years Opportunity.
NewStaining Software Engineer Associate JouléStaining Software Engineer AssociateOro Valley, AZ$40–$55 / hourWe prefer a Bachelors degree in Software Engineering, Computer Science, or other Engineering discipline; candidates with a background in Life Sciences (Biology, Chemistry) will also be considered. You will create software supplements to install these procedures, manage the underlying database elements required to support them within our applications, and ensure all deliverables are executed on time.
Systems Safety Engineer Butler America AerospaceSystems Safety EngineerSouth Tucson, AZ$105–$127 / hourFull timeIn addition to reviewing programs for numerous issues, the chosen candidate will support Raytheon Engineering in conduct of senior-level Non-Advocate Reviews, Failure Review Boards, Engineering Safety Review Boards, Independent Reviews of programs, safety issues and/or systemic issues requiring corrective actions to improve safety. Collaborate with stakeholders across a range of engineering functions to identify and mitigate risks: Systems Engineering, Software Engineering, Firmware Engineering, Electrical Engineering, Hardware Engineering, Environmental Safety, & Health, Human Systems Interfaces, Test Engineering.
Test Equipment Engineering (TEE) Butler America AerospaceTest Equipment Engineering (TEE)South Tucson, AZ$100–$132 / hourContractorDesign, develop and integrate object oriented software applications using C#, C++ in Microsoft Visual Studio in a Windows Operating System (OS) Prioritize and handle multiple software engineering tasks concurrently Troubleshoot software and test equipment instrumentation Work in a multidiscipline engineering team environment Develop and derive requirements for software products Lead and mentor junior software engineers. TEE has job opportunities across all phases of the engineering lifecycle, including demonstrations, early engineering tests, design verification tests, production, and post production sustainment.
NewSecret Clearance Software Engineer / Principal Software Engineer – Test Equipment U.S. Citizens Only Trispoke managed servicesSecret Clearance Software Engineer / Principal Software Engineer – Test Equipment U.S. Citizens OnlyTucson, AZSoftwareEngineer #PrincipalSoftwareEngineer #CSharp #CPP #VisualStudio #WindowsDevelopment #TestEquipment #ATE #DefenseJobs #AerospaceJobs #SecretClearance #ActiveSecret #USCitizen #EngineeringJobs #EmbeddedSystems #HiringNow #TucsonAZ #W2Jobs #ContractJobs #OpenToWork. Keywords: C#, C++, Visual Studio, Windows, Test Equipment, ATE, Software Engineer, Principal Software Engineer, Hardware Integration, OOP, TCP/IP, UDP, GitHub, Azure DevOps, Aerospace, Defense, Active Secret Clearance.
Sr. Software Engineer Mister Car Wash IncSr. Software EngineerTucson, AZExperienced in building core business layer of an application, designing for change and scalability, and building domain-centric modern microservices APIs following MACH architecture. Lead and collaborate as a member on a team of developers, business analysts, product managers, and QA/testing staff focused on delivering secure and top-notch new digital experience for our customers.
Mid-Level Software Engineer Leidos Holdings IncMid-Level Software EngineerTucson, AZ$87,100–$157,450 / yearIf you're passionate about solving complex technical challenges, learning emerging technologies, and developing software that directly supports mission success, this is an exciting opportunity to grow your career while making a meaningful difference. As a Full Stack Engineer, you'll contribute across the entire software development lifecycle, from crafting intuitive user interfaces to building scalable backend services and integrating secure, cloud-native solutions.
Software Engineer: Full Stack - Python, Java or JavaScript/TypeScript (TS/SCI Clearance Required) North Point TechnologySoftware Engineer: Full Stack - Python, Java or JavaScript/TypeScript (TS/SCI Clearance Required)Tucson, AZThe ideal candidate has an excellent understanding of the full software development lifecycle and exceptional coding skills across front-end interfaces, backend services, and secure cloud integrations in support of the mission. The qualified candidate must have an active Top Secret/SCI security clearance and will design, develop, and deliver modern, cloud-native software solutions that enable national security missions.
Software Engineer World View Enterprises IncSoftware EngineerTucson, AZ$100,000–$125,000 / yearAs a Software engineer, you will be responsible for working closely with our internal and external customers, partners, and operations team to drive the technical solutions that connect manned and unmanned stratospheric flight platforms to our ground systems. We provide on-demand, scheduled, and historical aerial data and analytics from sensors deployed in the stratosphere, offering persistent coverage, higher resolution, and greater value than traditional aerial and space-based imagery.
Principal Software Engineer with Test Equipment NR Consulting LLCPrincipal Software Engineer with Test EquipmentTucson, AZTypically requires a Bachelor s Degree in Science, Technology, Engineering, or Mathematics (STEM) and minimum 8 years prior relevant experience, or an Advanced degree in a related field and minimum 5 years experience. We are seeking a Principal Software Engineer to focus on the design, development, integration, and maintenance of software as a part of onsite factory support of systems to support weapon system product development.
Senior Software Engineer with Test Equipment NR Consulting LLCSenior Software Engineer with Test EquipmentTucson, AZTypically requires a bachelor s degree in Science, Technology, Engineering, or Mathematics (STEM) and minimum 5 years prior relevant experience, or an Advanced degree in a related field and minimum 3 years experience. The Senior Software Engineer with Test Equipment position is focused on the design, development, integration, and maintenance of software as a part of on-site factory support of systems to support weapon system product development.
NewStaining Software Engineer Associate Apollo Professional SolutionsStaining Software Engineer AssociateOro Valley, AZA four-year degree in Software Engineering, Computer Science, or a related Engineering discipline; candidates with backgrounds in Life Sciences such as Biology or Chemistry are also encouraged to apply. In this role, you will play a vital part in designing and developing staining procedures that support advanced assay development, contributing directly to improvements in medical diagnostics.
Senior Principal Software Engineer NR Consulting LLCSenior Principal Software EngineerTucson, AZQualifications You Must Have: Typically requires a bachelor s degree in Science, Technology, Engineering, or Mathematics (STEM) and minimum 10 years prior relevant experience, or an Advanced degree in a related field and minimum 7 years experience. Summary: The Senior Principal Software Engineer position is focused on the development, integration, test, and maintenance of software as a part of on-site factory support of test systems to support product testing.
NewStaining Software Engineer Associate Integrated Resources, IncStaining Software Engineer AssociateTucson, AZ$40–$55 / hourWe prefer a Bachelor’s degree in Software Engineering, Computer Science, or other Engineering discipline; candidates with a background in Life Sciences (Biology, Chemistry) will also be considered. You will create software supplements to install these procedures, manage the underlying database elements required to support them within our applications, and ensure all deliverables are executed on time.
NewStaining Software Engineer Associate Tailored ManagementStaining Software Engineer AssociateTucson, AZ$40–$55 / hourWe prefer a bachelor’s degree in software engineering, Computer Science, or other Engineering discipline; candidates with a background in Life Sciences (Biology, Chemistry) will also be considered. Integration & Collaboration: Work closely with cross-functional teams to integrate software solutions and coordinate with diverse stakeholders.
Principal Real-time Software Engineer RTX CorpPrincipal Real-time Software EngineerTucson, AZWorking with a cross-discipline team, the candidate must have experience developing, testing, and integrating software for edge or embedded devices and/or subsystems (like telecom, medical, IoT, automotive, or robotics) where hardware operation, time critical function, functional reliability, mission assurance, and safety might be major concerns. Our Principal Embedded Real-Time Software Developer/Integrator is a technical position that works in an Integrated Product Team (IPT) environment to architect, design, implement, test, debug, and deploy Software for Firmware (FPGA) and Hardware solutions that meet current and next generation autonomous avionics systems' needs.
NewStaining Software Engineer Associate Artech LLCStaining Software Engineer AssociateTucson, AZ$40–$55 / hourWe prefer a Bachelor’s degree in Software Engineering, Computer Science, or other Engineering discipline; candidates with a background in Life Sciences (Biology, Chemistry) will also be considered. You will create software supplements to install these procedures, manage the underlying database elements required to support them within our applications, and ensure all deliverables are executed on time.
NewPrincipal Software Engineer with ACTIVE Secret Security Clearance Geologics CorporationPrincipal Software Engineer with ACTIVE Secret Security ClearanceTucson, AZ$95–$120 / hourThey will be expected to work, either as a part of a team or independently, to design, develop, and implement system level applications in support of producing and maintaining weapon system products. The selected candidate will develop applications, libraries, and instrument drivers using the software style, development language, and integrated development environment specified by the organization.
NewSr HWIL Software Engineer RTX CorpSr HWIL Software EngineerTucson, AZThe Hardware in the Loop (HWIL) Department in Tucson, AZ is a multi-discipline organization responsible for designing, building and integrating state of the art testing environments (flight simulators for missiles), as the last step before flight test. On our team, you will work with weapon system designers to understand requirements, design solutions, integrate, and deploy the systems to help support tactical software development, testing, and delivery for missiles to the warfighter.
NewStaining Software Engineer Associate Nesco Resource, LLCStaining Software Engineer AssociateTucson, AZ$40–$55 / hourThis role will create software supplements used to install staining procedures, manage the supporting database elements within diagnostic applications, and deliver high-quality software solutions in a regulated environment. Client is seeking a Staining Software Engineer Associate to design and develop staining procedures in partnership with assay development teams.
Software Engineer - Secret Clearance The Computer Merchant, LtdSoftware Engineer - Secret ClearanceTucson, AZ$100–$105 / hourWhile an hourly range is posted for this position, an eventual hourly rate is determined by a comprehensive salary analysis which considers multiple factors including but not limited to: job-related knowledge, skills and qualifications, education and experience as compared to others in the organization doing substantially similar work, if applicable, and market and business considerations. Experience building and integrating instrument drivers and hardware interface software (e.g., TCP/IP, UDP; serial/GPIB/VISA; DAQs; oscilloscopes; power supplies) for engineering and production test systems.
Software Engineer- Secret Clearance Cross Resource GroupSoftware Engineer- Secret ClearanceTucson, ArizonaThis role is focused on developing Windows-based software applications, libraries, and instrument drivers used to support advanced production lines, engineering labs, and test equipment systems. This is a strong fit for a software engineer who enjoys hands-on technical work, hardware-connected software, troubleshooting, and building applications that support real engineering and production environments.
Software Engineer World ViewSoftware EngineerTucson, Arizona$100,000–$125,000 / yearAs a Software engineer, you will be responsible for working closely with our internal and external customers, partners, and operations team to drive the technical solutions that connect manned and unmanned stratospheric flight platforms to our ground systems. The division brings together advanced autonomous systems, mission technologies, and intelligence solutions that help customers create persistent awareness, operate with confidence, and make faster decisions in complex and contested environments.
NewStaining Software Engineer Associate The Fountain Group LLCStaining Software Engineer AssociateTucson, AZ$40–$55 / hourDevelop software supplements, manage supporting database elements, and ensure projects are delivered on time with a “Quality First Time” mindset. Collaborate closely with assay development, engineering, regulatory, marketing, and other cross-functional teams to gather requirements and deliver software solutions.
NewStaining Software Engineer Associate (Testing) Dawar ConsultingStaining Software Engineer Associate (Testing)Tucson, ArizonaThis role designs software solutions, creates software supplements, manages supporting database elements, and ensures timely, high-quality delivery in a regulated medical device environment. Bachelor's degree in Software Engineering, Computer Science, Engineering , or a related field (Life Sciences backgrounds with relevant technical skills will also be considered).
Sr. Software Engineer Mister CarwashSr. Software EngineerTucson, AZKnowledge, Skills, & Abilities: Extensive experience in Java, Spring framework, and Spring Boot; Swagger and Open API specificationExperienced in building core business layer of an application, designing for change and scalability, and building domain-centric modern microservices APIs following MACH architectureExtensive experience developing microservices using Java/SpringBoot/ASW tech stack. Experience using SCM tools like Gitlab, BitbucketExperience with CI/CD and build pipelines such as using Jenkins and Maven on AWSExperienced working in an Agile development environment with full exposure to SDLC process.
Sr. Software Engineer Geologics CorporationSr. Software EngineerTucson, AZ$70–$100 / hourTypically requires a Bachelor's Degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 8 years of prior relevant experience, or an Advanced degree in a related field and a minimum of 5 years of experience. The selected candidate will develop applications, libraries, and instrument drivers using the software style, development language, and integrated development environment specified by the organization.
Software Engineer II with Test Equipment - 2nd Shift RTX CorpSoftware Engineer II with Test Equipment - 2nd ShiftTucson, AZTSC has job opportunities across all phases of the engineering lifecycle, including demonstrations, early engineering tests, design verification tests, production, and post-production sustainment. The Senior Software Engineer with Test Equipment position is focused on the design, development, integration, and maintenance of software as a part of on-site factory support of systems to support weapon system product development.
Senior Embedded Software Engineer RTX CorpSenior Embedded Software EngineerTucson, AZWorking with a cross-discipline team, the candidate must have experience developing, testing, and integrating software for edge or embedded devices and/or subsystems (like telecom, medical, IoT, automotive, or robotics) where hardware operation, time critical function, functional reliability, mission assurance, and safety might be major concerns. Our Senior Embedded Software Engineer is a technical position that works in an Integrated Product Team (IPT) environment to architect, design, implement, test, debug, and deploy Software for Firmware (FPGA) and Hardware solutions that meet current and next generation autonomous avionics systems' needs.
Software Engineer II with Naval Power Test Equipment - Tucson, AZ - 2nd shift RTX CorpSoftware Engineer II with Naval Power Test Equipment - Tucson, AZ - 2nd shiftTucson, AZQualifications We Prefer: Experience developing Production Test Equipment in an Automation environment Introduction or experience with computer architecture and computer hardware optimization techniques Working knowledge of the development of software drivers for the operation of computer hardware interfaces Introduction or experience in common computer hardware interface and data protocols such as TCP/IP, UDP, or RS-422 Familiarity with laboratory test instrumentation, electronics, and software (e.g., oscilloscopes, power supplies, digital multimeters) Experience with Unified Modeling Language (UML) to visualize software architecture and design Professional experience of software development lifecycles, such as Waterfall and Agile Experience with Software Configuration Management principles Working understanding of the TEE One Page Process. What You Will Do: Prioritize and handle several engineering tasks concurrently Interact and engage with Engineering, Operations PTEs, and program personnel to support factory readiness and robustness Troubleshoot software and test equipment instrumentation Work in a multidiscipline engineering team environment Design, develop and integrate object-oriented software applications using C#, C++ in Microsoft Visual Studio in a Windows Operating System (OS) Support the development and derivation of requirements for software products.
Software Engineer II with Test Equipment - 4th Shift RTX CorpSoftware Engineer II with Test Equipment - 4th ShiftTucson, AZThe Senior Software Engineer with Test Equipment position is focused on the design, development, integration, and maintenance of software as a part of on-site factory support of systems to support weapon system product development. TSC has job opportunities across all phases of the engineering lifecycle, including demonstrations, early engineering tests, design verification tests, production, and post-production sustainment.
Principal Software Engineer with Test Solutions RTX CorpPrincipal Software Engineer with Test SolutionsTucson, AZQualifications You Must Have: Typically requires a Bachelor's Degree in Science, Technology, Engineering, or Mathematics (STEM) and minimum 8 years prior relevant experience, or an Advanced degree in a related field and minimum 5 years experience. At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world's most complex problems.
Principal Software Engineer - Test RTX CorpPrincipal Software Engineer - TestTucson, AZTypically requires a Bachelor's Degree in Science, Technology, Engineering, or Mathematics (STEM) and minimum 8 years prior relevant experience, or an Advanced degree in a related field and minimum 5 years experience. TEE has job opportunities across all phases of the engineering lifecycle, including demonstrations, early engineering tests, design verification tests, production, and post-production sustainment.
Senior Software Engineer with Test Solutions RTX CorpSenior Software Engineer with Test SolutionsTucson, AZQualifications You Must Have: Typically requires a bachelor's degree in Science, Technology, Engineering, or Mathematics (STEM) and minimum 5 years prior relevant experience, or an Advanced degree in a related field and minimum 3 years' experience. TEE has job opportunities across all phases of the engineering lifecycle, including demonstrations, early engineering tests, design verification tests, production, and post-production sustainment.
Backend Software Engineer Leidos Holdings IncBackend Software EngineerTucson, AZ$107,900–$195,050 / yearIf you've spent the last few years building your expertise in backend engineering, Java or Python development, and mission‑driven systems, and you're ready for work that actually moves the needle, this is the kind of opportunity cleared engineers pursue when they want real impact. For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
NewStaining Software Engineer Associate TalentBurst, Inc.Staining Software Engineer AssociateTucson, AZ$40–$55 / hourWe prefer a Bachelor s degree in Software Engineering, Computer Science, or other Engineering discipline; candidates with a background in Life Sciences (Biology, Chemistry) will also be considered. You will create software supplements to install these procedures, manage the underlying database elements required to support them within our applications, and ensure all deliverables are executed on time.
Software Engineer C# Associates SystemsSoftware Engineer C#Tucson, Arizona$75–$90 / hourDevelop software drivers for the operation of computer hardware interfaces Work with common computer hardware interfaces and data protocols such as TCP/IP, UDP, or RS-422 Utilize Unified Modeling Language (UML) to visualize software architecture and design Work within software development lifecycles, such as Waterfall and Agile Practice sound Software Configuration Management principles using Microsoft Azure DevOps Server or GitHub. Design, develop and integrate object-oriented software applications using C#, C++ in Microsoft Visual Studio in a Windows Operating System (OS) Prioritize and handle multiple software engineering tasks concurrently.
Software Engineer Foxhound FederalSoftware EngineerTucson, Arizona$80,000–$95,000 / yearFoxhound Federal is a service-disabled, veteran-owned small business specializing in helping federal agencies and consulting organizations acquire high-caliber candidates for business development, internal operations and program delivery. Preferred / Nice-to-Have Skills Candidates are not expected to have all of the following , but experience in any of these areas is a strong plus: Real-Time & Embedded Systems Experience with RTOS environments such as VxWorks or FreeRTOS.
Software Engineer ENG03 - Cleared On-Site BelcanSoftware Engineer ENG03 - Cleared On-SiteTucson, AZSecret Clearance*Job Description:* The Test Equipment Engineering (TEE) team within the Specialty Engineering Directorate is a multi-discipline organization responsible for developing advanced windows application solutions for all Client products. * TEE has job opportunities across all phases of the engineering lifecycle, including demonstrations, early engineering tests, design verification tests, production, and post-production sustainment.
Principal Software Engineer KomatsuPrincipal Software EngineerTucson, AZDemonstrated history of delivering large-scale software systems to customers, including ownership from concept through production deployment and operational support. Every day, our software directs fleets of autonomous haul trucks weighing hundreds of tons as they move millions of tons of material across some of the largest and most remote mining operations on Earth.
Principal Software Engineer - Lead Metrics & Tools Specialist RTX CorpPrincipal Software Engineer - Lead Metrics & Tools SpecialistTucson, AZAt RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world's most complex problems. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate's work experience, location, education/training, and key skills.
NewPrincipal HWIL Software Engineer RTX CorpPrincipal HWIL Software EngineerTucson, AZAdvanced experience across the Agile software development lifecycle in three or more of the following: C++ data structures and algorithms or C, C++, Python, and/or Object-Oriented Program Languages; integration of real-time software/firmware/hardware; software test equipment maintenance; software requirements definition, Advanced experience including at least two of the following: Embedded Software, Embedded Software Security, Embedded Operating Systems (Linux, RTOS, VxWorks, etc.), Software Architecture Design and Implementation. The Hardware in the Loop (HWIL) Department in Tucson, AZ is a multi-discipline organization responsible for designing, building and integrating state of the art testing environments (flight simulators for missiles), as the last step before flight test.
Senior Software Engineer I Rocket Lab USASenior Software Engineer ITucson, AZImportant information: FOR CANDIDATES SEEKING TO WORK IN US OFFICES ONLY: To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR), Rocket Lab Employees must be a U.S. citizen, lawful U.S. permanent resident (i.e., current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum, or be eligible to obtain the required authorizations from the U.S. Department of State and/or the U.S. Department of Commerce, as applicable. As a Senior Software Engineer I based at our Optical Systems sites in Tucson, AZ, you will have the opportunity to support Tranche 3 of the U.S. Space Development Agency's (SDA) Proliferated Warfighter Space Architecture (PWSA) by building deep learning neural networks for advanced Electro-Optical (EO/IR) technology.
Mid-Level Software Engineer Avenue Technologies CompanyMid-Level Software EngineerTucson, ArizonaAvenue Technologies & Commodities Inc. (ATCI) provides engineering, technical, and professional services supporting mission-critical defense, aerospace, and government programs. This role applies sound engineering practices across the software lifecycle while collaborating with cross?functional teams to deliver reliable and scalable systems.
Software Security Lead - Principal Software Engineer - S3E RTX CorpSoftware Security Lead - Principal Software Engineer - S3ETucson, AZExperience designing, implementing, testing, or fielding real-time security-oriented solutions on Department of Defense (DoD) programs (embedded experience highly preferred). The SSL must help the program adhere to secure coding practices and the Software Product Assurance Command Media by: Act as the Technical Lead and possibly the Agile Product owner for the Software Security Team.
Software Integration Engineer (US Citizenship Required) Teledyne Technologies IncSoftware Integration Engineer (US Citizenship Required)Tucson, AZJob Duties & Responsibilities: • Test and validate software to ensure it meets user and mission requirements • Design, execute, and maintain test plans; document and report defects clearly • Collaborate closely with developers to diagnose issues and improve product quality • Set up and configure hardware/software systems for internal testing and external demonstrations • Provide remote technical support to customers and partners • Troubleshoot software, system, and deployment issues in lab and field environments • Travel for installations, demos, and test events • Develop deep product knowledge and grow into a customer-facing technical support role • Work independently while contributing effectively to a collaborative team. Our products include advanced surveillance sensors, unmanned air and ground vehicles, sensing devices used to detect chemicals, biological agents, radiation and explosives, and a host of other solutions that help warfighters, first responders, and search-and-rescue teams do their jobs better.
NewSoftware Engineer Quest DiagnosticsSoftware EngineerTucson, ArizonaQuest Diagnostics is looking for a Software Engineer to create well-designed, effective, testable, and specification-compliant code and carry out the entire product development lifecycle. Develops documentation, flowcharts, layouts, diagrams, charts, code comments, and clean code to explain and show solutions.
Principal Software Engineer with Test Equipment - 2nd Shift RTX CorpPrincipal Software Engineer with Test Equipment - 2nd ShiftTucson, AZQualifications You Must Have: Typically requires a Bachelor's Degree in Science, Technology, Engineering, or Mathematics (STEM) and minimum 8 years prior relevant experience, or an Advanced degree in a related field and minimum 5 years experience. TSC has job opportunities across all phases of the engineering lifecycle, including demonstrations, early engineering tests, design verification tests, production, and post-production sustainment.
Principal Software Engineer with Test Equipment - 4th Shift RTX CorpPrincipal Software Engineer with Test Equipment - 4th ShiftTucson, AZQualifications You Must Have: Typically requires a Bachelor's Degree in Science, Technology, Engineering, or Mathematics (STEM) and minimum 8 years prior relevant experience, or an Advanced degree in a related field and minimum 5 years experience. TSC has job opportunities across all phases of the engineering lifecycle, including demonstrations, early engineering tests, design verification tests, production, and post-production sustainment.