Principal Process Engineer

  • ADVANCE TRS
  • Croydon, London
  • Jan 30, 2026
Full time Engineering

Job Description

Principal Process Engineer

Water & Waste Sector
UK locations: Croydon, Exeter, Swindon (Hybrid)
Salary: 60,000 - 70,000
Full-time Permanent 37.5 hours

The Opportunity

We're looking for a Principal Process Engineer to take a leading role in delivering innovative water and wastewater projects that genuinely make a difference. You'll work at the forefront of sustainable infrastructure, leading multidisciplinary design teams while mentoring and developing the next generation of engineers.

What You'll Be Doing

  • Leading process design on single and multi-disciplinary projects
  • Providing technical leadership and driving best-practice solutions
  • Delivering outline and detailed process designs for water and wastewater schemes
  • Undertaking site and process surveys of existing assets
  • Reviewing and checking designs produced by others
  • Managing client and stakeholder relationships
  • Supporting and line-managing developing engineers

What We're Looking For

Essential:

  • Significant experience in process engineering within the water & waste sector
  • Strong knowledge of treatment processes, standards, and regulations
  • Experience in outline and detailed process design
  • Excellent communication and leadership skills
  • Degree (BEng/MEng) in Chemical Engineering or related discipline
  • Chartered Engineer (CEng) or working towards

Desirable:

  • ATEX/DSEAR and HAZOP experience
  • CAD/BIM knowledge
  • Full UK driving licence

Why Join?

  • Lead high-impact projects that support sustainability and climate resilience
  • Hybrid working and flexible arrangements
  • Clear progression and strong professional development support
  • Collaborative, people-first culture
  • Competitive benefits alongside a salary up to 70k

We are an equal opportunity employer and value diversity in our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.