At a Glance
- Tasks: Lead mechanical design for water treatment projects and mentor junior engineers.
- Company: AFECO, a leading engineering services provider in the water industry.
- Benefits: Competitive salary, life insurance, pension, and 25 days holiday.
- Other info: Join a collaborative team with a commitment to equal opportunities.
- Why this job: Make a real impact on essential water projects while developing your engineering skills.
- Qualifications: Degree in Mechanical Engineering and experience in the water sector required.
The predicted salary is between 40000 - 50000 £ per year.
Position Summary
Senior Mechanical Design Engineer – Location: Havant or Tamworth – Line Manager: Design Manager
About AFECO
AFECO is an engineering services provider delivering high‑quality process and MEICA design and installation projects, primarily in the South of England and Midlands for the water industry.
With over 30years of experience, we support all stages of the innovation and project delivery cycle from concept to operations, specialising in water, wastewater, marine, energy, and power sectors.
Role Purpose
The Senior Mechanical Design Engineer will lead the mechanical design of water and wastewater treatment assets across the project lifecycle, from concept and detailed design through to construction support and commissioning.
The role requires strong technical capability, sound engineering judgement, and the ability to mentor junior engineers while working collaboratively with multi‑disciplinary teams.
Key Responsibilities
- Lead mechanical design activities for water and wastewater treatment projects, including pumping stations, treatment works, pipelines, and associated infrastructure.
- Produce and review mechanical designs, calculations, specifications, schedules, and drawings.
- Ensure designs comply with relevant standards, legislation, client specifications, and health & safety requirements.
- Undertake optioneering and value engineering to balance cost, performance, risk, and operability.
- Support constructability, commissioning, and handover activities.
- Specify, size, and select mechanical equipment such as pumps, valves, screens, blowers, mixers, and mechanical treatment processes.
- Review supplier technical submissions and manage technical interfaces with vendors.
- Assess whole‑life cost, reliability, and maintainability of mechanical systems.
- Work closely with process, civil, electrical, and ICA engineers to deliver integrated solutions.
- Liaise with clients, contractors, suppliers, and operations teams.
- Provide technical input during design reviews, HAZID/HAZOP, and risk workshops.
- Mentor and technically support graduate and intermediate engineers.
- Review and approve work produced by others.
- Contribute to the development of internal standards, best practices, and lessons learned.
Qualifications & Experience
- Essential: Degree (or equivalent) in Mechanical Engineering.
- Significant experience in the water or wastewater sector.
- Strong knowledge of mechanical equipment used in water treatment and conveyance.
- Experience delivering designs through concept, detailed design, and construction stages.
- Familiarity with relevant standards (e. g., ISO, BS, EN, WIMES, client standards).
- Desirable: Experience working on regulated water frameworks.
- Site experience including commissioning or construction support.
- Knowledge of asset management and whole‑life cost analysis.
- Experience with NEC or other engineering contracts.
- Technical skills: mechanical design and specification, pumping system design and hydraulics (desirable), design risk assessment and CDM compliance, 2D/3D CAD tools (e. g., Auto CAD, Solid Works), engineering calculations and reports.
Salary and Benefits
- Medicash plan
- Life insurance
- Benefits portal
- Company pension
- 25 days holiday (plus bank holidays)
- Equal Opportunities
As a company, we are committed to equal opportunities for all and do not discriminate on the grounds of race, religion or belief, sexual orientation, gender reassignment, marital or civil partner status, sex, disability or age.
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Senior Mechanical Design Engineer in Havant employer: AF ECO Ltd
AF ECO Ltd is an excellent employer, offering a dynamic work culture that prioritises safety and compliance while fostering professional growth in the civil engineering sector. With competitive benefits such as a company vehicle or allowance and a comprehensive health plan, employees are supported both personally and professionally, making this an ideal location for those looking to make a meaningful impact in water and wastewater infrastructure projects.
