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.
Embedded Design Engineer Marvin Test Solutions, Inc.Embedded Design EngineerIrvine, CA$115,000–$170,000 / yearFull timeThis involves working on field-programmable gate arrays (FPGAs) and firmware for embedded systems based on cutting-edge system-on-chip (SoC) technology. We collaborate with industry giants in commercial and military electronic systems, offering a dynamic and innovative work environment where monotony is unheard of.
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.
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.
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!
NewCivil Design Engineer PE JobotCivil Design Engineer PEPasadena, CA$125,000–$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. Design impactful water resource solutions at Civil Engineer Firm, lead H&H projects, mentor teams, and drive innovative flood & stormwater engineering.
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.
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.
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.
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.
Sr Embedded Systems Software Engineer CyientSr Embedded Systems Software EngineerIrvine, CAContractorTotal Position 2 or more, Location: Irvine CA (100% Onsite). Salary: $110k to 115k Per annum or C2C- $70/hr Max.
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.
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.
NewRubber Process Engineer JobotRubber Process EngineerIrwindale, CA$100,000–$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 will focus on optimizing extrusion processes, improving product quality, troubleshooting production issues, and supporting new equipment and material development.
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.
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.
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.
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.
NewWire Engineer JobotWire EngineerArcadia, CA$120,000–$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. If you are a problem solver who enjoys working on complex projects and has a passion for wire and cable design, we would love to hear from you.
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.
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.
NewStructural Engineer JobotStructural EngineerOrange, CA$120,000–$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. The firm provides innovative solutions across diverse markets, supporting technically complex projects that require regulatory rigor, cost control, schedule discipline, and creative structural design.
NewEngineer- Flex Assemblies JobotEngineer- Flex AssembliesGlendale, 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. Stay abreast of the latest developments in the field of flex assemblies, and leverage this knowledge to drive continuous improvement in our products and processes.
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.
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.
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.
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.
NewElectrical Engineer JobotElectrical EngineerIrwindale, CA$120,000–$185,000 / 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 offers end-to-end involvement—from design and prototyping through testing and production—working on cutting-edge high-speed and RF technologies.
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 .
Principal Ride Development Engineer Walt Disney ImagineeringPrincipal Ride Development EngineerGlendale, CA$139,200–$186,600 / yearWorking across a spectrum of disciplines that range from creative and conceptual to scientific and technical, Imagineers blend an innovative mixture of storytelling, art, science, and technology to create immersive experiences, memorable destinations, and innovative entertainment for families around the globe. Ride Engineers bring optimism and solutions to design challenges that often seem impossible and partner with diverse creative talent to define and build one-of-a-kind experiences that bring fun and joy to millions of people all around the world.
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.
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.
Reliability Engineer Marvin Test Solutions, Inc.Reliability EngineerIrvine, CA$98,000–$130,000 / yearFull timeYou'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. We work with some of the biggest names in commercial and military electronic systems, providing a fast-paced and innovative work environment where the work is never boring.
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.
Student Engineer Marvin Test SolutionsStudent EngineerIrvine, CAAs a team member in a small group developing airborne electronic equipment, you will be selecting, ordering, logging, following-up and expediting part orders, researching the Internet and other written material, creating electrical drawings and documents, doing some basic electronic design and experiments. We are looking for a part time (15-25 hrs/wk) second- or third-year intern majoring in Electrical Engineering, Physics, CS or ME with a high level of organizational skills.
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.
Integration & Test Engineer Butler America AerospaceIntegration & Test EngineerAnaheim, CA$25–$30 / hourFull timeFollow company's inspection guidelines to conduct critical non-routine visual, dimensional, mechanical, electrical test and functional inspections on a wide variety of components, assemblies, equipment, systems, supplies and materials. Verifies apparatus and equipment for conformance to electrical, mechanical and other requirements using various kinds of electrical and mechanical test equipment.
Sr. Test Engineer Butler America AerospaceSr. Test EngineerBuena Park, CA$110,000–$125,000 / yearFull timeThe Senior Test Engineer is responsible for the development and execution of Acceptance Test Procedures (ATP), Manufacturing Test Procedures (MTP), Qualification Test Procedures (QTP), designing and building test equipment and writing Equipment Operating Instructions (EOI). This position is accountable for ensuring that the testing of products meets all customer specifications and that the test equipment is available in a timely manner.
NewBioinformatics Pipeline Test Engineer Yantran LLCBioinformatics Pipeline Test EngineerIrvine, CA$30–$32 / hourContractorWe are seeking a Bioinformatics Test Engineer to validate and ensure the quality of NGS data pipelines and bioinformatics workflows. Design and execute testing strategies for NGS pipelines (alignment, variant calling, annotation).
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.