Sr. Mechanical Design Engineer STP

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

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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.