Sr. Mechanical Design Engineer – STP

Candidate Profile

"The ideal candidate should have a robust combination of STP project experience, mechanical design expertise, equipment selection, engineering calculations, and site execution support. Candidates with only general mechanical design experience but without significant STP/Wastewater Treatment project exposure may not be suitable for this role".

Location: Chennai, India
Experience: 8–15 Years
Salary: Up to ₹18 LPA(410)
Working Days: Monday–Saturday
Working Hours: 9:00 AM–6:00 PM
Interview Mode: Online – Teams
Interview Rounds: 2
Notice Period: Less than 60 days

Role Overview

We are looking for an experienced Sr. Mechanical Design Engineer with strong hands-on experience in Sewage Treatment Plant (STP) / Wastewater Treatment projects.

The candidate will be responsible for mechanical system design, equipment selection, engineering calculations, preparation and review of technical drawings and documentation, as well as coordination with cross-functional teams and providing technical support during installation, commissioning, and testing.

Key Responsibilities

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Design mechanical systems for STP and wastewater treatment projects.

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Prepare equipment layouts, piping layouts, mechanical GA drawings, and fabrication drawings.

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Design and support mechanical systems involving:

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Pumps

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Blowers

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Mixers

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Screens

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Sludge handling equipment

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Aeration systems

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Select appropriate mechanical equipment based on plant capacity, process requirements, and project specifications.

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Evaluate vendor technical specifications and prepare technical data sheets for equipment procurement.

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Review and approve supplier/vendor drawings.

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Perform engineering calculations related to:

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Pump sizing

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Pipe sizing

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Flow rates

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Pressure losses

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Power requirements

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Prepare and review Material Submittals, Mechanical GA Drawings, P&IDs;, Equipment Layouts,



and Fabrication Drawings.

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Ensure mechanical designs comply with applicable project specifications, safety standards, and environmental requirements.

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Coordinate with civil, electrical, process, and instrumentation teams, contractors, and other stakeholders.

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Ensure proper integration of mechanical systems with plant structures and control systems.

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Provide technical support during equipment installation, commissioning, testing, and troubleshooting.

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Support project execution and resolve mechanical design and site-related issues.

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Maintain proper engineering documentation and project records.

Must-Have Skills

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5+ years of hands-on experience in mechanical design for STP/Wastewater Treatment projects.

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5+ years of experience in equipment selection and engineering calculations for STP projects.

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Current/recent experience working as a Mechanical Design Engineer specifically for STP projects.

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Strong understanding of STP/Wastewater Treatment mechanical systems and processes.

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Experience with mechanical equipment such as pumps, blowers, mixers, screens, sludge handling systems, and aeration systems.

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Strong knowledge of equipment sizing, pipe sizing, flow calculations, pressure-loss calculations, and power requirements.

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Experience in providing technical support during installation, commissioning, and testing of STP projects.

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Strong understanding of piping systems, equipment layouts, GA drawings, and P&IDs;.

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Bachelor's degree in Mechanical Engineering or equivalent Mechanical Engineering qualification.

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Good communication, coordination, and project management skills.

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Notice period should be less than 60 days.

Nice-to-Have Skills

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Proficiency in AutoCAD.

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Experience with SolidWorks and/or Autodesk Inventor.

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Experience in preparing and reviewing fabrication drawings.

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Strong project coordination and stakeholder management skills.

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Experience coordinating with contractors and vendors during project execution.

📌 Sr. Mechanical Design Engineer STP (Chennai)
🏢 Important Business
📍 Chennai