Lead Mechanical - BESS

PeopleStrong; Bengaluru; On-site; INR 4,000,000 - 7,000,000; Full time

Job summary

DEIC-L&T Precision Engineering & Systems IC is seeking a Lead Mechanical Engineer specialized in Battery Energy Storage Systems (BESS) in Bengaluru. You will own the mechanical design, structural analysis, and certification of 20-foot containerised battery enclosures from concept to commissioning.

The role requires senior leadership, experience with ISO/IEC standards, and collaboration with EPCs and AHJs to drive safe and compliant solutions.

Qualifications

• Bachelor of Engineering (BE) required.
• Experience leading design for battery container/enclosures and related infrastructure.
• Familiarity with IEC/ISO standards and regulatory compliance processes.

Responsibilities

• Lead end-to-end mechanical design of 20-foot battery container/enclosures and related infrastructure.
• Perform and oversee structural analysis using FEA tools under multiple load cases.
• Coordinate with manufacturing partners and ensure DFMA/ DFA reviews.
• Ensure regulatory compliance including FEMA/UL/IEC standards for BESS installations.

Skills

Mechanical Analysis

Mechanical Design

Mechanical Assembly

Solidworks

CATIA

Education

Bachelor of Engineering (BE)

Tools

ANSYS

Abaqus

SolidWorks Simulation

SolidWorks

CATIA

Job description

• DEIC-L&T Precision Engineering & Systems IC

Posted On 07 Oct 2026

End Date 05 Apr 2027

Required Experience 12 - 18 years

Skills

Engineering Mechanical Analysis Mechanical Assembly Mechanical Design Solidworks

Bachelor of Engineering (BE)

Job Description

POSITION SUMMARY

We are seeking a highly experienced Lead Mechanical Engineer specialising in Battery Energy Storage Systems (BESS) to join our growing Energy Storage Division. The successful candidate will own the end-to-end mechanical design, structural analysis, and certification of 20-foot ISO containerised battery enclosures and related infrastructure, from concept through commissioning. This is a senior individual-contributor and technical-leadership role that directly influences product architecture, manufacturing partners, and regulatory compliance strategy — including the full suite of relevant IEC and international standards.

KEY RESPONSIBILITIES

• 1. Enclosure & Container DesignLead the full mechanical design lifecycle of 20-foot battery container/enclosure systems, including structural frames, base skids, wall panels, roofing, doors, and lifting lugs.Develop and own 3D CAD models and detailed engineering drawings (GD& T) for fabrication, using SolidWorks, CATIA, or equivalent parametric tools.Define and manage BOM structures, part numbering, and revision control in PLM/PDM systems.Specify and select enclosure materials (steel, stainless, aluminium, composites) based on corrosion class, fire rating, and thermal requirements.Design internal layout for battery rack integration, cable management, thermal management, and auxiliary equipment (HVAC, fire suppression, electrical panels).Drive Design-for-Manufacture (DFM) and Design-for-Assembly (DFA) reviews with contract manufacturers.Ensure container dimensional and structural interface compliance with ISO 668 and ISO 1496-1 (series 1 freight container specifications).
• 2. Structural Analysis & FEA Perform and lead structural analysis of enclosure assemblies under seismic, wind, snow, dead, and live load combinations per applicable codes (IBC, ASCE 7, Eurocode EN 1993 as needed).Conduct or oversee Finite Element Analysis (FEA) using ANSYS, Abaqus, or SolidWorks Simulation for stress, fatigue, buckling, and modal analysis.Specify and review welder qualifications, weld procedures (WPS/PQR), and non-destructive examination (NDE/NDT) requirements.Produce and review structural calculation packages for permit submission and third-party PE-stamped peer review.
• 3. Regulatory Compliance & Certification Ensure all designs meet FEMA requirements for Flood Insurance Rate Map (FIRM) zones, including flood-proofing, elevation certificates, and FEMA 348/FIA-TB-2 compliance.Lead UL 9540 / UL 9540A, NFPA 855, IFC, and NEC 706 compliance reviews for containerised BESS installations.Interface with Authorities Having Jurisdiction (AHJs), PE stamp requirements, and third-party certification bodies (UL, TÜV, Intertek, Bureau Veritas).Manage seismic qualification per ICC-ES AC156, IBC Chapter 16, and ASCE 7-22 for site-specific risk categories.Coordinate with EPC partners and site civil engineers on foundation loads, anchor bolt design, and geotechnical interface.Apply and interpret the full IEC BESS standards suite across mechanical design, safety, environmental, and transport domains — see dedicated IEC Standards section below.
• 4. Thermal & Environmental Management Define thermal management strategy (liquid cooling, HVAC, ventilation) to maintain cell and BMS temperatures within OEM-specified limits across ambient design range (typically −30°C to +50°C).Conduct or review CFD analyses (Fluent, FloEFD, or similar) for internal airflow and hotspot mitigation.Specify ingress protection (IP) ratings per IEC 60529 and NEMA enclosure classifications; design door seals, cable gland arrays, and ventilation baffles accordingly.Ensure environmental endurance of enclosure per IEC 60068 test series (thermal cycling, damp heat, salt mist, vibration, shock).
• 5. Fire & Safety Systems Integration Define mechanical interface requirements for aerosol, FM-200, CO?, or water-mist fire suppression systems per NFPA 855 and OEM requirements.Specify deflagration venting panels, explosion-proof fittings, and duct penetration seals per IEC 60079-series (ATEX/IECEx) and NEC Class I Div 2 requirements.Specify minimum ventilation rates for battery rooms/enclosures per IEC 62485-3 to prevent accumulation of flammable off-gases.Collaborate with safety engineering to execute HAZOP, FMEA, and PHA for mechanical systems per IEC 62933-5-2 risk assessment methodology.
• 6. Battery Module & System Interface Define mechanical mounting, vibration isolation, and thermal interface requirements for battery racks and modules, ensuring compliance with IEC 62619 and IEC 63056.Verify UN 38.3 transport qualification evidence for all lithium cell and module assemblies; specify shock and vibration isolator requirements to maintain qualification compliance after installation.Specify module-level mechanical boundary conditions (load paths, clearances, cable routing) in coordination with battery OEM and electrical teams.
• 7. Technical Leadership & Project Management Act as technical lead and mentor for junior/mid mechanical engineers on the BESS product team.Drive design reviews (P