Sr. Mechanical Design Engineer – STP

Candidate Profile
"The ideal candidate should have a strong 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
Design mechanical systems for STP and wastewater treatment projects.
Prepare equipment layouts, piping layouts, mechanical GA drawings, and fabrication drawings.
Design and support mechanical systems involving:
Pumps
Blowers
Mixers
Screens
Sludge handling equipment
Aeration systems
Select appropriate mechanical equipment based on plant capacity, process requirements, and project specifications.
Evaluate vendor technical specifications and prepare technical data sheets for equipment procurement.
Review and approve supplier/vendor drawings.
Perform engineering calculations related to:
Pump sizing
Pipe sizing
Flow rates
Pressure losses
Power requirements
Prepare and review Material Submittals, Mechanical GA Drawings, P&IDs, Equipment Layouts, and Fabrication Drawings.
Ensure mechanical designs comply with applicable project specifications, safety standards, and environmental requirements.
Coordinate with civil, electrical, process, and instrumentation teams, contractors, and other stakeholders.
Ensure proper integration of mechanical systems with plant structures and control systems.
Provide technical support during equipment installation, commissioning, testing, and troubleshooting.
Support project execution and resolve mechanical design and site-related issues.
Maintain proper engineering documentation and project records.
Must-Have Skills
5+ years of hands-on experience in mechanical design for STP/Wastewater Treatment projects.
5+ years of experience in equipment selection and engineering calculations for STP projects.
Current/recent experience working as a Mechanical Design Engineer specifically for STP projects.
Strong understanding of STP/Wastewater Treatment mechanical systems and processes.
Experience with mechanical equipment such as pumps, blowers, mixers, screens, sludge handling systems, and aeration systems.
Strong knowledge of equipment sizing, pipe sizing, flow calculations, pressure-loss calculations, and power requirements.
Experience in providing technical support during installation, commissioning, and testing of STP projects.
Strong understanding of piping systems, equipment layouts, GA drawings, and P&IDs.
Bachelor's degree in Mechanical Engineering or equivalent Mechanical Engineering qualification.
Good communication, coordination, and project management skills.
Notice period should be less than 60 days.
Nice-to-Have Skills
Proficiency in AutoCAD.
Experience with SolidWorks and/or Autodesk Inventor.
Experience in preparing and reviewing fabrication drawings.
Strong project coordination and stakeholder management skills.
Experience coordinating with contractors and vendors during project execution.
Skills: piping systems,flow calculations,project management,engineering calculations,mixers,p&ids,stp/wastewater treatment projects,aeration systems,mechanical design,equipment selection,sludge handling systems,stp/wastewater treatment mechanical systems,power requirements,pumps,commissioning,pipe sizing,communication,pressure-loss calculations,installation,mechanical design engineer,equipment layouts,ga drawings,blowers,equipment sizing,screens

Work arrangement
No