Assistant Principal/Senior Mechanical Engineer (Treatment Plant)

Mott MacDonald is a global engineering, management, and development consultancy committed to delivering impactful work that shapes the future.

We are a team of over 20,000 experts working across the world in more than 50 countries.
We are proud to be part of an ever-changing global industry, delivering transformative work that’s defining our future. It’s our people who power that performance. As an employee-owned business, we invest in creating a space for everyone to feel safe and valued and empowered with the right tools and support. 

Whether you want to pursue excellence in your specialism or broaden your experience with flexible roles across our business, you’ll be connected to a community of global experts championing you to be your best. Join us and shape your story with Mott MacDonald, where everyone has the opportunity to be brilliant.

Roles & Responsibilities

• Preparation of Equipment layout and civil outline drawings for waste water and desalination 

• Preparation of Piping Material specification and valve material specification as per project 

• Cross checking of hydraulic calculation and hydraulic flow diagram during detail engineering 

• Preparation of pump head calculation and blower head calculation. 

• Preparation of RFQ (ready for quotations) for Bought out items such as Intake pumps, 

• Preparation of RFQ for Package items such as compressor, lime handling system and co2 storage system and  Degasifier system etc. 

• Preparation of technical datasheets for all rotary and static equipment’s. 

• Preparation of technical bid evaluation and manufacturing clearance for all the bought out 

• Checking of vendor GA’s for various equipment’s. 

• Follow up with vendor & consultant/client for the documents approval. 

• Preparation of line sizing and pipe wall thickness calculation. 

• Design and preparation of fabrication skid drawings such as UF Module rack, valve rack and compact High pressure RO Skids, RO CIP Skids and UF Backwash skids 

• Checking of piping isometric drawings and piping 2D GA drawing. 

• Checking of pipe supports drawings (Above ground and below grounds such as thrust bloc 

• Preparation and checking of mechanical GA drawings as per the bought out details. 

• Preparation of initial and final piping MTO (Material to be ordered). 

• Preparation of erection BOM and release for site. 

• Coordination of other disciplines such as Process, Civil, Electrical and instrumentation. 

• Co-ordination of site team and preparation of as built drawings. 

• To understand the design risk and assumptions associated with the project and manage this risk. 

• To record the risks and assumptions as the project progresses. 

• To ensure that the designers responsibilities under CDM are adhered to by all 

• To promote good H&S practice and minimise risks to operators / maintainers (e.g. designing out confined spaces and working from heights) 

• To understand the environmental issues associated with the design and to manage them through the design process 

• Undertake post project reviews to identify and communicate lessons learnt and best practice. 

• Ensure the design team are working to the company procedures (i.e. Engineering, CAD, and QA procedures). 

• Identify potential improvements to the client’s systems and procedures 

Candidate Specification :

• BE or M Tech in Mechanical Engineering 

• MIMechE/ MIET or equivalent Professional qualifications of workings towards achieving it 

• Detailed knowledge of the design process, engineering, and engineering design 

• Good understanding of project commercial issues and constraints 

• Appreciation of Health, Safety and Environmental systems and procedure 

Software requirement: 

• Experience in either of AutoCAD® P&ID, OpenPlant PID, SmartPlant P&ID, OpenPlant Modeller is desired 

• Revit MEP, Navisworks 

• Microsoft Word, Excel, and PDF document management, Bentley ProjectWise 

Flexible working
At Mott MacDonald, we support our staff to create work-life balance which works for them and welcome candidates looking for career flexibility. We are open to discussing flexible working at interview stage.

Our benefits package is designed to enhance your experience:

• Agile working
• Critical illness and compassionate leave
• Paternity Leave
• Group term life insurance, and Group medical insurance coverage
• Career mobility options
• Short and Long-term global employment opportunities
• Global collaboration and knowledge sharing

Employment Compliance Requirement

As part of our global compliance requirements, all candidates must hold a valid Right to Work (RTW) document in India, which will be verified during the recruitment process.
Acceptable documents include a Passport, Voter ID, or Birth Certificate.
By applying, you confirm that you can provide valid documentation if and when required.