Mechanical Design Engineer (Chennai)

Mechanical Design Engineer (Chennai)

Company Background
Planys is a deep-tech company developing mission-critical robotic and digital systems for defence and strategic infrastructure. The company designs and builds unmanned systems and advanced sensing solutions across underwater, maritime, and land domains, with a strong focus on naval, coast guard, and army applications. Planys is actively engaged in the development of Unmanned Underwater Vehicles (UUVs) ranging from small to extra-large platforms, along with ruggedised electronic and digital systems for armoured vehicles.

Leveraging its strong foundation in marine robotics, underwater inspection, and non-destructive evaluation (NDT), Planys integrates defence-grade electronics, sensing, and data analytics to deliver high-reliability systems suitable for harsh operational environments. The company combines platform engineering, payload integration, and AI-enabled digital analytics to support situational awareness, asset integrity assessment, and data-driven decision-making for defence forces and strategic asset operators.

Planys, globally recognised for strategic infrastructure solutions, is now focused on creating a robust and enduring presence in the defence sector, delivering indigenous unmanned and digital systems for the Army, Navy, and Coast Guard. (Website: www.planystech.com )

Role & Responsibilities
Lead end to end mechanical design of ROVs, AUVs, & asset inspection robotic systems.
Design subsea pressure housings for electronics & sensors, Familiar with Pressure vessel design as per (BPVC), Material selection, thickness calculations, FEA Analysis of pressure vessels




Design of underwater Propulsion System components, Sizing and Selection of Motors, bearings, Design of motor housings, shafts, bearing housing
Develop structural designs considering static, dynamic, thrust loads, vibration, fatigue and hydrodynamic effects. Knowledge of hydrodynamics and CFD. Conversant with FEA/CFD tools
Design sealing & penetrator interfaces — O-ring grooves, shaft seals, face seals, dynamic and static sealing conditions.
Design robotic mobility systems (kinematics, adhesion(magnetic/ vacuum), seledrive torque estimation, surface traction studies).
Carry out requirement analysis, concept evaluation, feasibility & simulation-based validation (analytical + numerical).
Rapid prototyping & hands-on development including machining, assembly, tolerance adjustments, and fit checks.
Conduct field testing and sea trials, analyse in-water performance and iterate designs based on operational feedback.
Work closely with Electrical, Software and Field Service teams during integration and qualification testing.
Drive product reliability improvements, failure mode analysis (RCA), corrective actions and build robustness in next revisions.
Create engineering documents — detailed drawings (GD&T;), tolerance analysis, BOMs, testing plans & design reports.
Excellent Knowledge of GD&T; is required.
Mentor junior engineers & interns on design best-practices & build reviews.

Expected Skillset
3D CAD (SolidWorks)
Pressure Vessel Design
Marine Propulsion Design
FEA / CFD Analysis
Sealing Engineering
Troubleshooting & Field Engineering
Cross-Function Collaboration
Reliability Engineering & FMEA

📌 Mechanical Design Engineer (Chennai)
🏢 Planys Technologies
📍 Chennai