Principal Mechanical Design Engineer

RSE; Warrington; On-site; GBP 50,000 - 80,000; Full time

Benefits offered by this job

Industry-leading salary

Company car allowance

Flexible career development

31 days holiday allowance

Pension scheme

Cycle to work scheme

Discounted gym membership

Professional fees paid

Employee discount platform

EV/Hybrid car lease scheme

Job summary

RSE in Warrington is seeking a Principal Mechanical Design Engineer to support water treatment solutions across the UK. You will oversee project design from scoping to implementation while ensuring compliance with specifications and standards.

Ideal candidates will have a degree in Mechanical Engineering and experience in the water and wastewater treatment sector. The role offers an industry-leading salary, company car allowance, and extensive holiday benefits.

Qualifications

• 5+ years of mechanical design engineering experience in municipal water/wastewater treatment.
• Experience from optioneering/FEED to construction support.
• Full UK driving licence is required.

Responsibilities

• Meet with clients to discuss technical requirements.
• Lead project planning and implementation with delivery teams.
• Provide technical guidance to project team and management.
• Mentor and develop mechanical engineers.

Skills

Mechanical design engineering experience

Design management experience

Programme/financial management experience

Ability to work on multiple projects

Education

Degree/HND/HNC in Mechanical Engineering

Chartered engineer with relevant body

Job description

About The Role

What Are We Looking For? Our in‑house design team is looking for a Principal Mechanical Design Engineer to join our Asset Management business platform and assist in the delivery of water treatment solutions across the UK. You will take on a key role in all aspects of projects from scoping and detailed design right through to implementation, ensuring compliance with client specifications and current regulatory standards, with a strong focus on low‑carbon solutions.

Key Responsibilities

• Meeting with clients to discuss specific intervention requirements.
• Leading the planning and implementation of projects in association with our Delivery Management teams.
• Providing technical guidance on mechanical matters to the wider project team and senior management.
• Line management and development of mechanical engineers within your team.
• Taking the lead on the development of mechanical design deliverables by you and your team.
• Mentoring, identifying and developing the next generation of mechanical engineering talent.
• Ensuring compliance with client specifications and current regulatory and industry standards.

Required Qualifications

• Degree/HND/HNC in Mechanical Engineering or equivalent.
• Chartered engineer with a relevant professional body is preferable.
• Mechanical design engineering experience within the municipal water/wastewater treatment sector.
• Design management/lead experience.
• Programme/financial management experience.
• Experience of working at all design stages, from optioneering/FEED through to construction support and as‑built is highly desirable.
• Ability to work on multiple projects consecutively.
• Full UK driving licence.

What We Offer

• Industry‑leading salary.
• Company car allowance.
• Flexible career development path, with no restrictions on where your career can go.
• Holiday allowance of 31 days per year, rising to 33 days per year after two years’ service.
• Holiday buy/sell scheme.
• Company pension scheme.
• Cycle to work scheme.
• Discounted national gym membership.
• Professional fees paid.
• Employee discount platform.
• EV/Hybrid car lease scheme.
• Access to a network of health professionals including mental health champions and an occupational health nurse.

Company Overview

RSE is a trusted clean water technology company, developing market‑leading products and solutions for purifying drinking water, recycling wastewater and cleaning water in industrial processes. We are disrupting the water sector, delivering water treatment products, technologies, and services to clients across the UK. RSE provides off‑site modular build solutions using a low‑carbon approach compared to traditional construction methods and our unique offering focuses on innovation, efficiency and excellence. Established in 1982, RSE has grown into one of the most prominent engineering businesses in the UK water industry. We have a complete in‑house and full‑service capability from project inception through to design, fabrication and delivery by means of installation and commissioning, and we additionally have one of the largest servicing and maintenance teams in the market. With over 2000 staff across our group, our strategic ambition will see the business continue to grow as we expand our operations and diversify our products. We drive servant leadership and give our people the opportunity and responsibility to take an entrepreneurial approach in their career development.