Senior Design Engineer

J3A Recruitment; Bath; Hybrid; GBP 50,000 - 60,000; Full time

Benefits offered by this job

Hybrid flexibility – 3 days in office, 2 days WFH

25 days holiday + Bank Holidays

Genuine career progression and personal development opportunities

Health cash plan

Enhanced annual leave + purchase scheme

Life assurance & pension

Job summary

A leading company in the UK water sector is seeking a Senior Mechanical Design Engineer to lead the design and delivery of complex mechanical systems within water and wastewater infrastructure projects. This role offers a competitive salary of up to £60,000, hybrid working options, and significant career progression opportunities in a supportive and innovative environment.

Qualifications

• 5+ years in senior mechanical design roles, preferably water-focused.
• Strong knowledge of chemical dosing and mechanical systems design.
• Experience coordinating and leading multi-disciplinary teams.

Responsibilities

• Lead mechanical design for treatment systems and infrastructure.
• Own projects from concept to construction.
• Mentor junior engineers and support the wider team.

Skills

Mechanical systems design

Chemical dosing

Water quality monitoring

Proficiency in 2D/3D Autodesk CAD packages

Education

HNC/HND or Degree in Mechanical Engineering

Job description

23 hours ago Be among the first 25 applicants

Direct message the job poster from J3A Recruitment

Director & Owner of J3A Recruitment | Permanent, Contract & Retained Recruiter for the Water Industry | Ex Paratrooper | Wannabe Golfer | All round…

Senior Mechanical Design Engineer – Water Industry

Midsomer Norton | Up to £60,000 + Hybrid Working + Big Progression Potential

J3A Recruitment are buzzing to be partnered with a serious player in the UK water sector.

My client are an award-winning, family-run business that’s growing fast and delivering innovative engineering solutions across all 10 major UK water frameworks. This isn’t just a job — it’s a chance to get in early with a company that’s going places in AMP8 and beyond.

They’ve trusted us with this critical Senior Mechanical Design Engineer hire. So, if you’re a mechanical design pro with water/wastewater experience and want to be part of something genuinely exciting, this one’s for you.

The Role of the Senior Design Engineer

You’ll lead the design and delivery of complex mechanical systems within water and wastewater infrastructure projects. Think treatment plants, pumping stations, chemical dosing systems, and more.

You’ll work with a team of 40+ engineers on cutting-edge, sustainable solutions, while mentoring junior staff and influencing key technical decisions.

What You’ll Be Doing as the Senior Design Engineer

• Lead mechanical design for treatment systems, pumping stations & infrastructure
• Own projects from concept to construction
• Develop detailed mechanical specs, surveys & system interfaces
• Produce and challenge designs to drive innovation and continuous improvement
• Mentor junior engineers and support the wider team
• Attend client meetings, present technical designs, and support site visits
• Collaborate with commercial and PM teams for successful delivery

What You’ll Need to be successful as Senior Design Engineer

• 5+ years in senior mechanical design roles (preferably water-focused)
• HNC/HND or Degree in Mechanical Engineering (can be flexible with qualifications - preference would be towards experience and profile)
• Strong knowledge of chemical dosing, water quality monitoring, and mechanical systems design
• Proficiency in 2D/3D Autodesk CAD packages
• Experience coordinating and leading multi-disciplinary teams

What You’ll Get:

• Up to £60,000 salary
• Hybrid flexibility – 3 days in office, 2 days WFH
• 25 days holiday + Bank Holidays
• Genuine career progression and personal development opportunities
• Sustainable, innovative project work with UK-wide impact
• Supportive, friendly culture — they’re a Sunday Times Top 100 Place to Work
• A long list of benefits including:
• Health cash plan
• Enhanced annual leave + purchase scheme
• Life assurance & pension

This is a serious opportunity to shape your career at a company with momentum. The firm are delivering exciting work across water, power, and energy – and they’re only just getting started.

If you want your designs to actually mean something — and your efforts to be seen, valued, and rewarded — let’s talk.

Apply now or message John Lycett at J3A Recruitment for more details.

Seniority level

• Seniority level

  Associate

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering, Design, and Project Management

• Industries

  Utilities, Engineering Services, and Design Services

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