Thermax

OT / ICS Security Intern

InternshipIn OfficeMumbai, Maharashtra3 months26K/mo15 openingsImmediate / Rolling

About this internship

Thermax has an open OT / ICS Security Intern position in Mumbai for motivated freshers and final-year students. You will work on live operational technology and industrial control security projects and finish with something you can genuinely talk about in interviews. About the role As an OT / ICS…

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Skills you'll use

ICS / SCADA BasicsPurdue ModelNetwork SegmentationAsset InventoryModbus / OPCRisk AssessmentIEC 62443 BasicsNetworkingLinuxDocumentation

What you'll do

Work on learning why a plant network cannot simply be patched on a Tuesday, and how security is done where uptime is safety alongside the core team
Apply ICS / SCADA Basics, Purdue Model, Network Segmentation, Asset Inventory to live, production-facing problems
Document your work clearly for reviewers and stakeholders
Participate in reviews and act on the feedback you receive
Collaborate across engineering, product, design or business as required
Follow the team's quality, testing and documentation standards

Who can apply

Pursuing or recently completed B.E./B.Tech (ECE/EEE/Instrumentation/CSE), BCA/MCA or B.Sc (IT)
Graduating batch 2026 or 2027 — final-year students and recent graduates welcome
60% / 6.0 CGPA and above preferred; strong project work is considered alongside academics
Working knowledge of ICS / SCADA Basics, Purdue Model, Network Segmentation (or a genuine willingness to learn them)
Exposure to Asset Inventory, Modbus / OPC, Risk Assessment is an advantage
Clear written and verbal communication in English, and care with detail in your work
No prior work experience required — this is a fresher-friendly internship
Based in Mumbai, Maharashtra or willing to work from there for the internship period

Perks & benefits

Networking with senior professionalsInternship CertificateLetter of RecommendationMentorship from a named mentorLive project experienceStructured onboarding and a formal mentor at a large, established employer

Interview & selection process

3 rounds — typical selection flow for this role:

1Application screening & resume shortlisting by the talent team
2Discussion with the hiring manager on the role and your fit
3HR discussion — stipend, start date, expectations and offer

About Thermax

Thermax operates in the energy & environment engineering sector and has an active presence in Mumbai. Interns here are put on real work from the start, because the team's view is that the fastest way to learn a craft is to practise it under people who already do it well — not to watch it from a…

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