NewSenior Embedded Systems Engineer JobotSenior Embedded Systems EngineerTorrance, CA$60–$74 / hourInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Teams work closely across engineering, manufacturing, and customers, giving individuals real ownership, visibility, and influence over outcomes.
NewApplications Engineer - Industrial Water Systems JobotApplications Engineer - Industrial Water SystemsTustin, CA$95,000–$125,000 / year4+ years of experience in application engineering and proposal development for custom industrial water and wastewater treatment systems, including aeration, clarification, disinfection, media and membrane filtration (NF, RO, UF), water softening, ion exchange, and systems for raw water, boiler water, cooling water, oily water, process water, produced water, ultrapure water, and wastewater treatment. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
NewBAS/HVAC Systems Software Engineer II JobotBAS/HVAC Systems Software Engineer IICovina, CA$90,000–$135,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We offer comprehensive, integrated solutions, including engineering applications, automated control systems, design assistance, sustainable maintenance, and retro-commissioning services.
Vice President Systems Engineering Marvin Test Solutions, Inc.Vice President Systems EngineeringIrvine, CA$225,000–$270,000 / yearFull timeWe deal with some of the biggest names in commercial and military electronic systems and sub-systems, and we’re looking for an experienced VP to manage our Testing and System Engineering Department. We’re dedicated to advancing our customers' success by designing and delivering innovative test solutions that combine quality, performance, and ease of use.
Systems Safety Engineer MANTECHSystems Safety EngineerEl Segundo, CAThe Senior System Safety Engineer will help protect our national security while supporting the USSF Space Systems Command (SSC) Space Access Directorate at Los Angeles Air Force Base. Assisting the Debris Characterization (DC) project manager with the coordination of airborne assets to collect data for root cause determination in the event of a catastrophic mishap.
NewSr. DevOps Engineer JobotSr. DevOps EngineerSeal Beach, CA$140,000–$160,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. The Development Ops Engineer is responsible for bridging the gap between software development and IT operations, focusing on the continuous and automated delivery of high-quality software.
NewSenior Mechanical Engineer JobotSenior Mechanical EngineerTorrance, CA$1,200,000–$145,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. This team has delivered award-winning architectural and engineering solutions for both public and private sector clients across: Aerospace, Commercial and Industrial giants, Correctional and Government Facilities, Educational Institutions and Healthcare Facilities to name a few.
NewManufacturing Engineer JobotManufacturing EngineerBrea, CA$100,000–$120,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. With advanced capabilities across silicone sealants and insulation components, our client operates from a modern California facility and serves a broad and critical customer base, while fostering innovation, craftsmanship, and continuous growth.
NewPCB Manufacturing Engineer JobotPCB Manufacturing EngineerIrvine, CA$90,000–$110,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. The successful candidate will be a vital part of our organization, utilizing their expertise in PCBA Development within electronics manufacturing to drive operational efficiency and effectiveness.
NewMechanical Engineer JobotMechanical EngineerTorrance, CA$135,000–$165,000 / yearThe successful candidate will be responsible for the design, analysis, development, testing, and integration of mechanical systems and components used in advanced aerospace platforms, including aircraft, spacecraft, unmanned systems, propulsion systems, and supporting ground equipment. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
NewPavement Engineer – Senior, Project, and Associate Levels JobotPavement Engineer – Senior, Project, and Associate LevelsRancho Santa Margarita, CA$80,000–$170,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. For almost 60 years, we have built our reputation as a trusted consultant for some of the most challenging and recognizable construction and Civil & Geotechnical Engineering projects across Southern California because we do things a little differently!
NewData Center Controls Engineer JobotData Center Controls EngineerAnaheim, CA$110,000–$180,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We develop creative and effective solutions to meet our employee’s and clients’ needs, creating a culture that acknowledges achievements and encourages professional development while providing challenging project work and career Advancement.
NewAzure Cloud Engineer JobotAzure Cloud EngineerFullerton, CA$150,000–$200,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Jobot, and/or its agents and contracted partners.
Red Hat Certified Engineer (RHCE) Bowhead / UIC Technical ServicesRed Hat Certified Engineer (RHCE)Corona, CAThe Red Hat Certified Engineer (RHCE) will provide senior-level administration, engineering, and operational support for Linux-based enterprise systems and container platforms supporting mission-critical government and DoD programs and serve as a technical authority for Linux infrastructure, container orchestration, automation, and secure system operations in classified and unclassified environments. • Deploy, configure, administer, and sustain Red Hat OpenShift clusters, including control plane and worker nodes, storage integration, networking, and platform upgrades.
NewProduct Development Engineer JobotProduct Development EngineerCorona, CA$75,000–$95,000 / yearWe offer a setting where your impact is visible, your ideas are heard, and your leadership helps guide long-term growth—making it an ideal place for those seeking both responsibility and meaningful influence in a stable, essential-services business. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
NewSr. AI Software Engineer (C#/.Net, infrastructure & startup exp. req'd) - 100% REMOTE JobotSr. AI Software Engineer (C#/.Net, infrastructure & startup exp. req'd) - 100% REMOTEIrvine, CARemote$170,000–$270,000 / yearThe ideal candidate will be mid-level backend .Net Software Engineer with recent experience within a small, fast-paced, API-focused AI infrastructure startup company with lean, highly collaborative engineering teams, where they have operated with significant ownership, autonomy, and a strong “go-getter” mentality. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
NewProject Engineer JobotProject EngineerBrea, CA$120,000–$140,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Get Hands-On with Tooling & Injection Molding: Define mold tooling requirements, collaborate with toolmakers on design and validation, review mold flow analyses, and support process optimization and production qualification.
NewStructural Engineer JobotStructural EngineerNewport Beach, CA$105,000–$145,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Meaningful, varied project work: Exposure to a broad mix of high-profile and technically demanding projects across industries like healthcare, data centers, education, and advanced manufacturing.
NewEmbedded Software Engineer JobotEmbedded Software EngineerAnaheim, CA$130,000–$170,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Job Details: We are seeking a highly skilled, experienced, and passionate Embedded Software Engineer to join our dynamic and innovative engineering team.
NewQuality Engineer JobotQuality EngineerIrvine, CA$90,000–$100,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We are seeking a detail-oriented Quality Engineer with strong experience in electronics manufacturing to support quality systems, product reliability, and continuous improvement initiatives.
NewCivil Engineer JobotCivil EngineerDana Point, CA$110,000–$160,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. This role requires a strong understanding of civil engineering principles, excellent project management skills, and proficiency in AutoCAD and AutoCAD Civil 3D.
NewPrincipal Flight Software Engineer JobotPrincipal Flight Software EngineerEl Segundo, CA$175,000–$200,000 / yearYou will play a pivotal role in shaping software strategy across spacecraft platforms including LEO, MEO, GEO, and responsive space architectures, working closely with systems, avionics, GNC, mission operations, and cybersecurity teams. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
NewProject Engineer-HVAC JobotProject Engineer-HVACGardena, CA$75,000–$100,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. This role requires a deep understanding of HVAC systems, commercial construction, project management, and MEP (Mechanical, Electrical, and Plumbing).
NewEnvironmental Remediation Engineer — $100k -$125k Base + Bonus JobotEnvironmental Remediation Engineer — $100k -$125k Base + BonusBuena Park, CA$100,000–$125,000 / yearOur work spans construction, engineering, and environmental services for oil and gas clients and public agencies across the western U.S. Many of the clients and agencies we serve have worked with us for years, making us one of the more established remediation and petroleum-infrastructure sources in the region. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.
NewSenior Materials & Process Engineer JobotSenior Materials & Process EngineerSanta Ana, CA$140,000–$190,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. Challenging Work: Solve real-world joining problems involving dissimilar metals, ceramics, atmosphere control, and high-reliability manufacturing requirements.
NewSenior Manufacturing Engineer - Composites JobotSenior Manufacturing Engineer - CompositesSanta Ana, CA$150,000–$180,000 / yearJob Details: You'll own the design, development, and optimization of advanced composite manufacturing processes for flight-critical aerospace hardware — leading process definition and control across multiple fabrication methods and serving as the primary interface between engineering, operations, quality, and customers. Founded over 50 years ago and based in Southern California, we are a Tier 1 aerospace and defense supplier of flight-critical, highly-engineered components and complex assemblies for military and space applications.
NewData Engineer III JobotData Engineer IIIIrvine, CA$160,000–$180,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. 5+ years in data engineering, with a proven track record designing, building, and maintaining ELT pipelines and dimensional models in production.
NewMechanical Project Engineer JobotMechanical Project EngineerGardena, CA$80,000–$120,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. We believe great outcomes come from empowering experienced leaders, aligning incentives with performance, and fostering a culture where accountability, collaboration, and long‑term relationships matter.
NewPrincipal Forensic Structural Engineer JobotPrincipal Forensic Structural EngineerOrange, CA$156,000–$220,000 / yearInformation collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. The firm provides innovative solutions across diverse markets, supporting technically complex projects that require regulatory rigor, cost control, schedule discipline, and creative structural design.
Test Engineer II (Torrance, CA) - 2 positions GCR Professional ServicesTest Engineer II (Torrance, CA) - 2 positionsTorrance, California$36–$46 / hourContractorTest Planning and Strategy: Collaborate with cross-functional teams, including design engineers and project managers, to understand the requirements and specifications of defense and aerospace systems. Test Automation and Continuous Improvement: Identify opportunities for test automation and develop automated test scripts and frameworks to streamline testing processes and increase efficiency.
NewElectrical Engineer II (Torrance, CA) - HYBRID GCR Professional ServicesElectrical Engineer II (Torrance, CA) - HYBRIDTorrance, CaliforniaContractorSystem Analysis: Analyze electrical systems and circuits, perform calculations, and use simulation software to evaluate their performance and make necessary improvements. *Collaboration: Collaborate with other engineers, technicians, and professionals to integrate electrical systems into larger projects or products.
Maintenance Engineer - Full Time Disneyland ResortMaintenance Engineer - Full TimeAnaheim, CAKEYWORD: DLR Casting, dlrcasting, Disneyland Resort Casting Hourly Jobs , DLRResortRoles, DLR Resort Roles, Facilities, HeroesWorkHere. To learn more about our benefits visit: https://jobs.disneycareers.com/benefits .
Embedded Electronic Design Engineer - DM15532016 Marvin Test SolutionsEmbedded Electronic Design Engineer - DM15532016Irvine, CARequired Recent Experience / Knowledge: Experience in designing FPGAs, microcontrollers, and military systems. Collaborate with engineering and manufacturing teams to ensure designs meet specifications and are manufacturable.
Reliability Engineer – MB2023 Marvin Test SolutionsReliability Engineer – MB2023Irvine, CAYou'll have the chance to put your skills to the test, qualifying military products and ensuring electronic and electro-mechanical assemblies and products are properly designed to enable operation in harsh environments such as airborne, vehicle, and flight line. Responsibilities: Ensuring electronic and electro-mechanical assemblies and products are properly designed to enable operation in harsh environments such as airborne, vehicle, and flight line.
Sr. Test Engineer – AN2024 Marvin Test SolutionsSr. Test Engineer – AN2024Irvine, CAAbility to technically lead a team of cross functional engineers and providing leadership, mentorship and guidance to complete technical and design tasks to achieve project goals. Responsibilities: You will work in an exciting and fast-paced environment designing and integrating test systems and Test Program Sets (TPS) for commercial and military electronics.
Staff Civil Engineer - Projects Disneyland ResortStaff Civil Engineer - ProjectsAnaheim, CA$126,800–$154,800 / year10+ years of experience in civil engineering design, including site layout, grading, drainage, utilities, stormwater management, erosion, and sedimentation control. Our department supports a wide range of project types that include shops, attractions, hotels, entertainment, maintenance facilities, offices, and nearly any built facility and area development found on our property.
NewSenior Facilities Engineer Butler America AerospaceSenior Facilities EngineerBuena Park, CAFull timeThis position would be responsible for supporting productivity and capital expenditure projects, product transfer projects with layout, linkage and flow of equipment and infrastructure, overseeing facility infrastructure improvement projects, ensures compliance and would work in partnership with the Maintenance and EH&S teams to provide operational support for facilities projects and services. Oversee and manage projects to upgrade and support the facility infrastructure including but not limited to: HVAC, ventilation and extractions systems, electrical systems, wastewater treatment and industrial water systems.
Operating Engineer - Facilities - Full Time Disneyland ResortOperating Engineer - Facilities - Full TimeAnaheim, CAOperating Engineers perform operational and functional checks of central plants for our facilities and world-famous attractions, providing direct support to Resort-wide hot water, chilled water, and compressed air requirements. KEYWORD: DLR Casting, dlrcasting, Disneyland Resort Casting Hourly Jobs , DLRResortRoles, DLR Resort Roles, Facilities, HeroesWorkHere.
NewReliability Engineer System OneReliability EngineerLong Beach, CA$140,000–$150,000 / yearDrive the development of Key Performance Indicators (KPIs), such as Asset Utilization, Overall Equipment Effectiveness (OEE), Mean Time Between Failure (MTBF), On-Stream Time (OST), and benchmark performance against best-in-class, track progress, and measure improvements. Lead the development, design and installation of predictive maintenance programs and technology applications to identify dominant deterioration and failure modes, causes/effects of deterioration, and corrective actions required to eliminate defects.
Senior Linux BSP Software Engineer Kforce Inc.Senior Linux BSP Software EngineerTustin, CA$155,000–$200,000Kforce's client, a growing, up and coming engineering technology company located in Tustin, CA, is hiring a Senior Linux BSP Software Engineer to support the design and development of next generation medical devices. Employee pay is based on factors like relevant education, qualifications, certifications, experience, skills, seniority, location, performance, union contract and business needs.
NewSite Reliability Engineer A-Line Staffing SolutionsSite Reliability EngineerIrvine, CAContractorThis role directly impacts the business by empowering our software development teams to deploy Agile enhancements to this cutting edge platform via monitoring and alerting around system health and defect leakage, while enriching the documentation and troubleshooting processes used to support the platforms at the restaurant level. The Site Reliability Engineer – Product Support Analyst will design, deploy and configure various customer-facing infrastructures, application, and services.
NewSr. Manufacturing Engineer B. Braun US Pharmaceutical Manufacturing LLCSr. Manufacturing EngineerIrvine, CA$120,000–$130,000 / yearThe targeted range for this role takes into account a range of factors that are considered when making compensation and hiring decisions; included but not limited to: skill sets; experience and training; licensure and certifications; and other business and organizational needs. Braun Medical Inc., a leader in infusion therapy and pain management, develops, manufactures, and markets innovative medical products and services to the healthcare industry.
Electrical Engineer System OneElectrical EngineerEl Segundo, CA$43–$55 / hourConduct site surveys or review existing reports to assess rack space, cable routes, power needs (UPS/Backup), and thermal loading for new equipment. Provide engineering support including design development, SIP/IRD preparation, design updates, technical reviews, and coordination activities.
Facilities Maintenance Engineer - GMP Manufacturing Michael Page USAFacilities Maintenance Engineer - GMP ManufacturingSanta Ana, CA$85,000–$115,000 / yearFull timeThis is a hands-on engineering role where you'll play a key part in maintaining and optimizing facility systems, utilities, and cleanroom environments while supporting ongoing construction and commissioning activities. A growing and highly innovative medical device manufacturing organization is seeking a Facilities Maintenance Engineer to support a newly built, state-of-the-art production facility.
NewReliability Engineer CalPortlandReliability EngineerFontana, CA$95,000–$115,000The Reliability Engineer supports cement plant Maintenance and Production departments with problem solving and project execution in order to reduce time, improve process and lower operating costs by effectively applying Reliability Engineering methods and predictive/preventive maintenance programs. Work closely with the Maintenance Planner, Maintenance Engineer, and Purchasing to ensure that all necessary inventories are established for spare parts and most common repair parts for critical equipment.
Network & Systems Engineer, Media Systems Engineering Amazon.com IncNetwork & Systems Engineer, Media Systems EngineeringCulver City, CAAbout the Team The Media Systems Engineering team designs and delivers production and post-production environments, technology solutions, and hybrid infrastructure that automate, streamline, and optimize audio and video workflows throughout the content creation lifecycle at Amazon MGM Studios and Prime Video. Prime members can customize their viewing experience and find their favorite movies, series, documentaries, and live sports - including Amazon MGM Studios-produced series and movies; licensed fan favorites; and programming from Prime Video add-on subscriptions such as Apple TV+, Max, Crunchyroll and MGM+.
Senior Requirements Systems Engineer - Air Traffic Systems (Onsite) RTXSenior Requirements Systems Engineer - Air Traffic Systems (Onsite)Fullerton, CaliforniaPrincipal Systems Engineers provide technical direction and clarification of requirements to software development teams & test personnel, perform system engineering analyses including trade studies, requirements definition and derivation, interface definition, and requirement verification and validation. Experience in Systems Engineering Requirements Activities: requirement derivation, interface allocations, systems integration, requirement sell off, requirements analysis, procedure development, test development, test execution and evaluation of results.
Power Systems Engineer Ige+Xao SAPower Systems EngineerIrvine, CAThe ideal candidate would be an experienced electric utility engineer or electrical consulting engineer looking to apply his or her power system engineering skills to the rapidly growing ETAP distribution market as well as data transferring solutions. ETAP supports customers in their digital transformation and sustainable energy transitions for a green and smart future, helping them to prioritize safety, maximize reliability, and stay resilient.
Systems Engineer-Spacestation-Nov23 Keltia Design IncSystems Engineer-Spacestation-Nov23CAAircraft Systems Engineers are responsible for the design, development, testing, and maintenance of various aircraft systems, including but not limited to avionics, electrical, hydraulic, fuel, and pneumatic systems for a spacestation. The job responsibilities of an Aircraft Systems Engineer may include: Developing system specifications and requirements: Aircraft Systems Engineers work with customers, project managers, and other engineers to develop system specifications and requirements for aircraft systems.