Mechanical Simulation Engineer

Job Title Mechanical Simulation Engineer Classification Exempt Reports to Functional Team Lead, Mechanical Date May 19th, 2026 Job Description Summary FIRST RF is seeking a highly motivated Mechanical Engineer with demonstrated expertise in FEA analysis methods to support the development of advanced RF and antenna systems for defense and aerospace applications.

This role focuses on structural, shock, dynamic, and thermal simulation of complex electronic and RF assemblies operating in demanding environments across land, sea, air, and space platforms.

You will work closely with multidisciplinary engineering teams to predict and solve mechanical challenges before hardware is built, helping ensure mission-critical performance and reliability for our customers.

Key Responsibilities Lead structural, thermal, and dynamic simulations for RF systems and electronic assemblies using a suite of Altair (now Siemens) simulation tools (Hypermesh, Optistruct, RADIOSS, Hyperlife), and SolidWorks Simulation.

Perform finite element analysis (FEA) to evaluate: Thermal performance and heat dissipation Thermo-Structural integrity Shock and vibration survivability Fatigue/Durability Environmental requirements under MIL-STD-810 and related conditions Develop and validate simulation models through correlation with environment, thermal, and vibration test data Collaborate with RF, mechanical, and electrical, and systems engineers to optimize designs for o Weight o Manufacturability o Reliability o Environmental performance o RF compatibility Support the design and packaging of high-reliability electronic and RF hardware for aerospace and defense applications Participate in technical and customer design reviews, presenting analysis results, and engineering recommendations Create and maintain engineering documentation, analysis reports, and test correlation data Support root-cause investigations and troubleshooting activities during integration and test Ensure compliance with ITAR, customer requirements, and applicable industry and military standards Qualifications Required Education and Experience Must have U.S.

citizenship and ability to obtain a U.S.

Security Clearance Bachelors degree in Mechanical Engineering, or related field 5+ years of relevant mechanical engineering experience in aerospace, defense, electronics packaging, or related industries Strong experience performing structural, thermal, and vibration simulation on complex assemblies Proficiency with simulation tools such as o Altair (now Siemens) Software Suite (Preferred) o SolidWorks Simulation (Preferred) o MSC Nastran o NX Nastran o ABAQUS Experience with electronic packaging for high-reliability environments Strong understanding of o FEA concepts & methodologies o Thermal management techniques o Shock and vibration analysis High-temperature material options and performance Experience working with MIL-STD-810 and/or DO-160 environmental requirements Proficiency with mechanical CAD tools, SolidWorks pre...