Cephas Consultancy Services Private Limited

Mechanical Engineer — Munition System

Chinatown, San Francisco

Sponsorship not specifiedDetected 1 day ago

SolidWorksCreoFusion 360ANSYSFEAStructural AnalysisGD&TPCB DesignMIL-STD

About the role

The system carries an electro mechanical safe and arm device (EMSAD) governed by a seven-state safety-arm-fire state machine, electromechanical safing features, and sensor suite.
Everything has to survive flight loads, drops, vibration, and field handling - and fail safe at every step.
Spec materials, finishes, tolerances, and fasteners for the operating environment (temperature, vibration, humidity, salt fog as relevant).

Design the munition housing, internal structure, and arming mechanism (S&A train, transport pin, motor-driven elements) in CAD.
Define the mechanical safety architecture together with the HW and SW leads - interlocks, out-of-line geometry, transport-pin retention, drop/impact behavior.
Build prototypes in-house (3D print, CNC) and run iteration loops; hand off drawings and DFM packages to external machinists / injection-mold vendors.
Own the BOM, weight budget, and CG budget.

5+ years designing mechanical assemblies that go into the field - UAV payloads, defense, automotive, aerospace, or similar regulated/rugged domains.

Experience with safety & arming (S&A) mechanisms, fuzing, pyrotechnics, or anything else that has to be unambiguously safe before it's allowed to be dangerous.
Familiarity with MIL-STD-810 (environmental), MIL-STD-331 (fuze tests), or equivalent civilian standards.
FEA / structural simulation (Ansys, SolidWorks Simulation, Onshape FEA).
Injection-mold and metal-casting DFM.
FPV / small-UAV background - payload integration, mass/CG sensitivity.
Small team, short cycles, weekly hardware iterations.
You'll have a desk next to the HW and SW engineers and a lab with prototyping kit.

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