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.
Mechanical Engineer Intermediate Level PENTA Engineering CorporationMechanical Engineer Intermediate LevelTucson, AZFull timeThe ideal candidate will provide technical leadership in advancing project objectives, collaborate within multidisciplinary teams, and support project delivery from concept through completion. The Intermediate Mechanical Engineer is responsible for the development of mechanical engineering concepts and designs for heavy industrial projects.
Senior Engineer, Mechanical, Control Actuation Systems RTX CorpSenior Engineer, Mechanical, Control Actuation SystemsTucson, AZProven design and manufacturing knowledge in machined parts, injection molded parts, hobbing, broaching, sheet metal fabrication, BLDC motors, wire harnesses/flex harnesses and related components, corrosion resistant steels and aluminum alloys. Typically requires a degree in Science,Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience or An Advanced Degree in a related field and minimum 3 years experience.
Senior Mechanical Design Engineer RTX CorpSenior Mechanical Design EngineerTucson, AZTeaming/Communication: Lead a mechanical engineering team and collaborate with cross-functional teams including other engineering disciplines, operations, supply chain, quality, and external suppliers to resolve technical challenges and develop effective design solutions. Design: Developing innovative technical solutions to a wide range of complex challenges spanning the entire product lifecycle, including proposal, advanced development, design, manufacturing, integration, and testing of missiles and launchers, support equipment and electronics for military programs.
Principal Mechanical Engineer - Electronics Packaging RTX CorpPrincipal Mechanical Engineer - Electronics PackagingTucson, AZThe Mechanical Engineering group in the Shipboard Effectors Department is currently searching for an experienced Mechanical Design Engineer to work on a multi-discipline team to support design and upgrades of Shipboard Effectors products and subsystems. Developing technical solutions to a wide range of complex problems related to the entire product life cycle including proposal, design, manufacture, integration and test of electronics for multiple military programs.
Mechanical Engineer - Test Equipment NR Consulting LLCMechanical Engineer - Test EquipmentTucson, AZWe are looking for humble geniuses, who believe that engineering has the potential to make the impossible, possible; innovators, who are not only inspired by technology and innovation, but also perpetually driven to design, develop, and test as a trusted partner for our Fortune 500 customers. DUTIES/RESPONSIBILITIES: Research, plan, design and develop mechanical test systems in areas including, but not limited to, vibration, thermal, hydraulic, radio frequency, and electro-optical for production testing environments.
Senior Mechanical Engineer Hatch LtdSenior Mechanical EngineerTucson, AZWith expertise in sustainable studies, asset building and operations, and industry-leading efficiencies, our best-in-class team leverages methodologies, governance and systems that are unparalleled in the engineering space. The candidate will promote and drive the Hatch Digital Project Delivery program, which includes intelligent 3D modeling, data centric multi-discipline engineering, and integrated delivery models.
Sr. Mechanical Engineer, ALE RTX CorpSr. Mechanical Engineer, ALETucson, AZTechnical ownership and execution of tasks, and may be viewed as a prime technical contact in providing solutions to a wide range of complex technical problems related to the design, manufacture, integration, and production sustainment of various mechanical sub-systems both in the engineering lab and the factory floor both at Raytheon Technologies and at suppliers. The Hardware Engineering, Air Launched Effectors Department is seeking Mechanical Engineers for our Tucson AZ site supporting full program life cycle, early development, production support, and legacy sustainment activities across the Air Launched Effectors products and subsystems.
Sr Mechanical Engineer, Harness & Interconnect RTX CorpSr Mechanical Engineer, Harness & InterconnectTucson, AZQualifications You Must Have Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience or An Advanced Degree in a related field and minimum 3 years experience. Experience with flex and rigid flex design including familiarity with ECAD software, PCB design, signal integrity, copper weight calculations, adhesives, dielectrics, coverlays, stiffeners and thermal management.
Mechanical Engineer II, Design RTX CorpMechanical Engineer II, DesignTucson, AZKey aspects of this role will involve interpreting and understanding engineering requirements, creating conceptual designs and technical data packages (TDPs), integrating Design for Manufacturing and Assembly (DFMA) principles and geometric dimensioning and tolerancing (GD&T), performing first-order analyses, conducting engineering tests and preparing detailed test reports, as well as presenting during design reviews. Demonstrated expertise in areas such as mechanical subsystem packaging, materials science, thermal analysis, structural analysis, tolerance analysis, energetics principles, control systems, interconnect design, airframe development, or large assembly engineering.
Principal Mechanical Engineer, Design RTX CorpPrincipal Mechanical Engineer, DesignTucson, AZTypically requires a 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 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.
Bike Shop Principal Mechanical Engineer RTX CorpBike Shop Principal Mechanical EngineerTucson, AZTypically requires a Bachelors in Science, Technology, Engineering, or Mathematics (STEM) and minimum of 8 years of prior relevant experience in mechanical engineering experience developing mechanical components and mechanical systems. This person will be the Responsible Engineering Authority (REA) or Integrated Product Team Lead (IPTL) for development of one or more complex mechanical systems and will be expected to mentor and guide less experienced team members.
Mechanical Engineer World View Enterprises IncMechanical EngineerTucson, AZ$130,000–$140,000 / yearThe 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. Our Tucson workplace is designed to support collaboration, focus, and well-being, with an on-site environment that keeps supply chain, manufacturing, engineering, quality, and program teams closely connected to the mission.
Sr. Mechanical Engineer, ALE RTXSr. Mechanical Engineer, ALETucson, ArizonaTechnical ownership and execution of tasks, and may be viewed as a prime technical contact in providing solutions to a wide range of complex technical problems related to the design, manufacture, integration, and production sustainment of various mechanical sub-systems both in the engineering lab and the factory floor both at Raytheon Technologies and at suppliers. The Hardware Engineering, Air Launched Effectors Department is seeking Mechanical Engineers for our Tucson AZ site supporting full program life cycle, early development, production support, and legacy sustainment activities across the Air Launched Effectors products and subsystems.
Advance Airframes - Senior Principal Mechanical Engineer RTX CorpAdvance Airframes - Senior Principal Mechanical EngineerTucson, AZStrong networking and influencing skills to engage effectively with cross-functional teams, program leadership, engineering disciplines, production support organizations, and manufacturing teams. Operate independently with minimal supervision, demonstrating strong project leadership capabilities, including delegating tasks effectively and reviewing the work of team members to ensure quality and alignment with program goals.
Principal Mechanical Engineer RTX CorpPrincipal Mechanical EngineerTucson, AZIn this dynamic role, you will be responsible for coordinating and executing engineering activities across multiple products, designing complex sub-systems or systems, managing a team of engineers, and ensuring seamless collaboration with suppliers and Raytheon factory operations, and program IPT's. Experience with effective communication (written and verbal) during collaboration with others to document design decisions and results, to perform trade studies, and to communicate to program leadership and customers through presentations and reports.
Principal Mechanical Engineer - Advance Airframes RTX CorpPrincipal Mechanical Engineer - Advance AirframesTucson, AZTasks will include design, integration, and test of mechanical-focused hardware using computer-aided design, mechanical analyses, and consistent coordination and communication across engineering teams to ensure successful hardware performance, usually demonstrated through flight tests. Typically requires a 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 minimum 5 years experience.
Senior Principal Mechanical Engineer RTX CorpSenior Principal Mechanical EngineerTucson, AZStrong networking and influencing skills to engage effectively with cross-functional teams, program leadership, engineering disciplines, production support organizations, and manufacturing teams. Operate independently with minimal supervision, demonstrating strong project leadership capabilities, including delegating tasks effectively and reviewing the work of team members to ensure quality and alignment with program goals.
Mechanical Engineer II - Test Equipment, Onsite (Tucson, AZ) RTX CorpMechanical Engineer II - Test Equipment, Onsite (Tucson, AZ)Tucson, AZTEE products are located in engineering labs, in the field, and in production environments utilized for weapon system product verification, qualification, test data analysis, and production test solution development. As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.
Principal Mechanical Engineer - Effectors RTX CorpPrincipal Mechanical Engineer - EffectorsTucson, AZLead mechanical engineering teams and collaborate across multiple disciplines with structural and thermal analyst, Materials Engineering, Quality, Safety, Supply Chain, Operations, and program leadership. This position will support the Land & Air Defense Systems missile and launcher product lines based in Tucson, AZ, and may require domestic and international travel to suppliers, Raytheon facilities, and customer sites.
Prin. Mechanical Engineer - ALE RTX CorpPrin. Mechanical Engineer - ALETucson, AZThe Hardware Engineering, Air Launched Effectors Department is seeking Mechanical Engineers for our Tucson AZ site supporting full program life cycle, early development, production support, and legacy sustainment activities across the Air Launched Effectors products and subsystems. Mechanical Engineering positions perform in alignment to expectations in the design, development, and production support areas associated with mechanical designs, validation principals, qualification processes, procurement, and production processes across a design life cycle.
Mechanical Design Engineer – Test Systems Quest Defense Systems & SolutionsMechanical Design Engineer – Test SystemsTucson, ArizonaIn this role, you will work on complex mechanical test solutions involving vibration, thermal, hydraulic, radio frequency, and electro-optical systems, helping ensure the reliability, performance, and quality of cutting-edge technologies throughout production and development. At Quest Defense Systems & Solutions, we partner with industry leaders to solve complex engineering challenges, bringing together innovative thinking and technical expertise to deliver solutions that make a real-world impact.
Senior Mechanical Engineer RTX CorpSenior Mechanical EngineerTucson, AZConceptualize and implement innovative technical solutions to address a wide range of complex challenges throughout the product lifecycle, including proposal development, advanced design, manufacturing, integration, testing, and support of missiles, launchers, support equipment, and electronics for military programs. Provide leadership to small teams by leveraging extensive mechanical hardware design expertise in a dynamic, collaborative environment, working across disciplines such as structures, thermal, systems, harness and interconnects, electronics packaging, tooling, and system integration.
Bike Shop Principal Mechanical Engineer RTXBike Shop Principal Mechanical EngineerTucson, ArizonaTypically requires a Bachelor’s in Science, Technology, Engineering, or Mathematics (STEM) and minimum of 8 years of prior relevant experience in mechanical engineering experience developing mechanical components and mechanical systems. This person will be the Responsible Engineering Authority (REA) or Integrated Product Team Lead (IPTL) for development of one or more complex mechanical systems and will be expected to mentor and guide less experienced team members.
2026 Fulltime - Mechanical Engineer I - Onsite RTX Corp2026 Fulltime - Mechanical Engineer I - OnsiteTucson, AZRaytheon's Air Launched Effectors Department is currently searching for Mechanical Engineers to work on multi-disciplined teams supporting the design and/or production support of Air Launched Effectors products and subsystems. Supporting First Article Inspection process (FAI), work alongside Quality engineers in support of that in addition to Raytheon Source Inspection (RSI), work instruction reviews, material dispositions, and root cause investigations to production issues.
Sr Mechanical Engineer - HWIL - P3 RTX CorpSr Mechanical Engineer - HWIL - P3Tucson, AZAs part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote. Qualifications You Must Have: Typically requires a Bachelor's in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 6 years of relevant experience, or An Advanced Degree in a related field.
RF Mechanical Engineer II RTX CorpRF Mechanical Engineer IITucson, AZThe Effector RF Design Department is seeking talented engineers with the skills and passion to develop complex Radio Frequency (RF) systems, subsystems and components, including antennas, RF circuit card assemblies, radomes, and RF test-equipment. Typically requires a Bachelor's in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 2 years of prior relevant experience to include any combination of the following: Experience performing design and analysis for the packaging of RF products (e.g.
Sr Mechanical Engineer Talon AnalyticsSr Mechanical EngineerTucson, AZPart timeFounded in 2019, Talon employs over 150 Aerospace and Defense engineers and other support staff to solve complex engineering problems for a variety of applications to include aircraft, ballistics, cybersecurity, motorsports, armor development, biological systems, missiles, and warheads. Provide engineering support to suppliers and manufacturing facilities-both domestically and internationally-including troubleshooting, product development, and obsolescence management.
Mechanical Design Engineer - Hydraulic Valves & Mechanisms Recruiting Engine (MLS)Mechanical Design Engineer - Hydraulic Valves & MechanismsTucson, AZPreferred Job Knowledge, Skills And Experience* Bachelor of Science degree in Mechanical Engineering, Mechanical Engineering Technology, Aerospace Engineering, or related field with at least 7 years related work experience (post-graduation).* Required Job Knowledge, Skills And Experience* Bachelor of Science degree in Mechanical Engineering, Mechanical Engineering Technology, Aerospace Engineering, or related field with at least 5 years related work experience (post-graduation).*
Principal RF Mechanical Engineer RTX CorpPrincipal RF Mechanical EngineerTucson, AZQualifications You Must Have: Typically requires a Bachelor's 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 minimum 6 years of experience to include any combination of the following: Experience performing design, analysis, and/or leadership of mechanical products, preferably RF mechanical products such as circuit card assemblies, antennas, radomes, guidance sections, RF test equipment, harnesses, and interconnects throughout the product life cycle. The selected candidate will be expected to lead multidiscipline teams, provide technical oversight, delegate tasks, and work with the Engineering organization to establish technology roadmaps, enable modernization, and contribute to general innovation.
Prin. Mechanical Engineer - ALE RTXPrin. Mechanical Engineer - ALETucson, ArizonaThe Hardware Engineering, Air Launched Effectors Department is seeking Mechanical Engineers for our Tucson AZ site supporting full program life cycle, early development, production support, and legacy sustainment activities across the Air Launched Effectors products and subsystems. Mechanical Engineering positions perform in alignment to expectations in the design, development, and production support areas associated with mechanical designs, validation principals, qualification processes, procurement, and production processes across a design life cycle.
Senior Principal Mechanical Engineer - Structural, High Temp Materials RTXSenior Principal Mechanical Engineer - Structural, High Temp MaterialsTucson, ArizonaRaytheon is seeking an experienced Senior Principal Structural Engineer to join the Mechanical Analysis and Test Department with a background in high temperature structural materials such as refractory metals, Ceramics, and Ceramic Matrix Composites (CMC’s). Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of prior relevant experience or an Advanced Degree in a related field and minimum 7 years experience.
NewMechanical Design Engineer Leonardo SpAMechanical Design EngineerTucson, AZThis highly collaborative position requires you to interface directly with internal engineering teams, our program managers, and external vendors, ensuring that designs are both innovative and manufacturable. What You'll Contribute: Core Design & Analysis: Perform mechanical product design, analysis, and development, focusing on components and assemblies such as: Heatsinks and Heat Exchangers for optimal thermal performance.
Mechanical Design Engineer The Computer Merchant, LtdMechanical Design EngineerTucson, AZ$88–$92 / 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. Position Overview: Perform analysis, simulation, test, and design engineering support for circuit card assemblies, in the power, analog, and/or motor controls domains.
Senior Principal RF Mechanical Engineer RTX CorpSenior Principal RF Mechanical EngineerTucson, AZQualifications You Must Have: Typically requires a Bachelor's in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 10 years of prior relevant experience, or an Advanced Degree in a related field and minimum 8 years of experience to include any combination of the following: Performing design and analysis for the packaging of RF products (e.g. The selected candidate will be expected to participate on multidiscipline programs, provide technical oversight, delegate tasks, and work with the Engineering organization to establish technology roadmaps, enable modernization, and contribute to general innovation.
NewSenior Mechanical Engineer Actalent IncSenior Mechanical EngineerTucson, AZ$65–$75 / hourWe are proud to be an Engineering News-Record (ENR) Top 500 Design Firm for our engineering design services and a ClearlyRated Best of Staffing winner for both client and talent service. If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email actalentaccommodation@actalentservices.com for other accommodation options.
Mechanical Engineer World ViewMechanical EngineerTucson, ArizonaThe 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. Our Tucson workplace is designed to support collaboration, focus, and well-being, with an on-site environment that keeps supply chain, manufacturing, engineering, quality, and program teams closely connected to the mission.
Senior Mechanical Engineer - Thermal Engineer RTX CorpSenior Mechanical Engineer - Thermal EngineerTucson, AZExperience in mechanical principles to solve classical thermal analysis solutions both inside and outside of finite element tools and an ability to work independently and manage multiple priorities. The Thermal Engineer is responsible for detailed thermal analysis on products throughout their lifecycle from initial design trade studies and proposals through qualification testing to enduring production support.
Mechanical Engineer II - Thermal Engineer RTX CorpMechanical Engineer II - Thermal EngineerTucson, AZExperience in mechanical principles to solve classical thermal analysis solutions both inside and outside of finite element tools and an ability to work independently and manage multiple priorities. Bachelor's degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 2 years of prior relevant experience; Alternatively an advanced degree in a STEM field can be substituted for 2 years experience.
Mechanical Engineer Arete AssociatesMechanical EngineerTucson, AZ$90,000–$115,000 / yearThe salary range for this role is $90,000 to $115,000; however, Arete considers several factors when extending an offer of employment, including but not limited to: the position and associated responsibilities, a candidate's work experience, education/training, and key skills. As a Mechanical Engineer at Areté, you will be responsible for designing, modeling, analyzing, assembling, and testing mechanical, electro-mechanical, and opto-mechanical systems and components.
Engineer II, Process Mechanical Bowman Consulting Group, Ltd.Engineer II, Process MechanicalTucson, ArizonaFull timeResponsible for the development of process/mechanical engineering deliverables, including process simulations using MetSim, SysCAD or other process modeling softwares, project equipment lists, flow sheets, equipment specifications and data sheets, piping and instrumentation diagrams (PIDs) and control narratives. Mobility around a job/construction site to include walking, bending, crawling, climbing, use of ladders, squatting, or kneeling and wearing of required Personal Protective Equipment (PPE), including occasional survey on elevated surfaces and roofs.
Senior Mechanical Engineer Tiberius AerospaceSenior Mechanical EngineerTucson, ArizonaThe Senior Mechanical Engineer will collaborate closely with multidisciplinary engineering teams including systems, avionics, manufacturing, and test engineering to ensure mechanical systems integrate effectively with broader platform architectures. The Senior Mechanical Engineer will work closely with engineering leadership and cross-functional teams to develop innovative mechanical solutions that support mission-critical aerospace technologies.
NewMechanical Design Engineer AimwelMechanical Design EngineerTucson, AZ$88–$92 / hourJOB TITLE: MECHANICAL DESIGN ENGINEER JOB LOCATION: TUCSON, AZ WAGE RANGE*: 88.00-92.00 PER HOUR JOB NUMBER: RTXCP00001076 JOB DESCRIPTION: Project Overview: Power/Analog test, analysis, and design support Position Overview: Perform analysis, simulation, test, and design engineering support for circuit card assemblies, in the power, analog, and/or motor controls domains. Benefits offered are in accordance with applicable federal, state, and local laws and subject to change at TCM's discretion.
Battery Engineer/Mechanical AirtronicsBattery Engineer/MechanicalTucson, ArizonaThe ideal candidate will have a BS-level mechanical or industrial engineering background, strong SolidWorks capability, and practical experience designing equipment, fixtures, layouts, and mechanical systems used in process engineering environments. Engineering Support: Work with chemical engineers to translate process requirements into mechanical designs for reactors, separators, tanks, pumps, transfer lines, filtration systems, solids handling, and sample-collection points.
Mechanical Engineer II - ALE - Strategic Strike RTX CorpMechanical Engineer II - ALE - Strategic StrikeTucson, AZTechnical ownership and execution of tasks, and may be viewed as a prime technical contact in providing solutions to a wide range of complex technical problems related to the design, manufacture, integration, and production sustainment of various mechanical sub-systems both in the engineering lab and the factory floor both at Raytheon Technologies and at suppliers. Raytheon's Air Launched Effectors Department is currently searching for Mechanical Engineers to work on multi-disciplined teams supporting the design and/or production support of Air Launched Effectors products and subsystems.
NewHybrid Mechanical Design Engineer - Aviation Interiors BombardierHybrid Mechanical Design Engineer - Aviation InteriorsTucson, AZApplicants should have a degree in Mechanical or Aerospace Engineering, at least five years of relevant experience, and proficiency in AutoCAD or CATIA. This role involves creating technical documentation, coordinating with teams and regulatory bodies, and optimizing design processes.
NewMechanical Engineer I RTX CorpMechanical Engineer ITucson, AZWhat You Will Do: Contribute to finding solutions to a wide range of technical problems related to the design, manufacture, integration, and production sustainment of various mechanical subsystems, including support in the engineering lab and the factory floor both at Raytheon and at suppliers. The Shipboard Effectors Department is currently searching for a Mechanical Design Engineer I to work on a multi-discipline team to support the production of Shipboard Effectors products and subsystems.
NewMechanical Engineer II - ALE - Strategic Strike RTXMechanical Engineer II - ALE - Strategic StrikeTucson, ArizonaTechnical ownership and execution of tasks, and may be viewed as a prime technical contact in providing solutions to a wide range of complex technical problems related to the design, manufacture, integration, and production sustainment of various mechanical sub-systems both in the engineering lab and the factory floor both at Raytheon Technologies and at suppliers. Raytheon’s Air Launched Effectors Department is currently searching for Mechanical Engineers to work on multi-disciplined teams supporting the design and/or production support of Air Launched Effectors products and subsystems.
Engineer II, Process Mechanical Bowman Consulting Group LtdEngineer II, Process MechanicalTucson, AZResponsible for the development of mechanical engineering/process deliverables, including process simulations using MetSim, SysCAD or other process modeling softwares, project equipment lists, flow sheets, equipment specifications and data sheets, piping and instrumentation diagrams (PIDs) and control narratives. Mobility around a job/construction site to include walking, bending, crawling, climbing, use of ladders, squatting, or kneeling and wearing of required Personal Protective Equipment (PPE), including occasional survey on elevated surfaces and roofs.
Senior Mechanical Engineer - Test Equipment, Onsite (Tucson, AZ) RTX CorpSenior Mechanical Engineer - Test Equipment, Onsite (Tucson, AZ)Tucson, AZTEE products are located in engineering labs, in the field, and in production environments utilized for weapon system product verification, qualification, test data analysis, and production test solution development. Typically requires a Bachelor's degree in a STEM field and five (5) years of relevant engineering experience, OR an advanced degree in related field and minimum three (3) years of related work experience.