Senior Mechanical Engineer

Job Type Permanent / Full Time
Area Rickmansworth
Sector Design Technician/ Engineer, Office and Commercial
Closing Date 19th December 2025
Job ref 1633507

Job Description

FJA are recruiting on behalf of a leading service provider in the wastewater industry for an experienced Senior Mechanical Engineer to strengthen their team.
 
This role is based in Rickmansworth, hybrid working available
 
Benefits

  • A competitive salary 
  • Hybrid Working (Jobs needs dependent) 
  • Car/car allowance (Jobs needs dependent) 
  • 25 days holiday + Bank Holidays (with an additional 5 days available to buy) 
  • Contribution Pension scheme 
  • Life Assurance 
  • Health Insurance 
  • Private Medical Insurance 
  • And many more benefits including – cycle to work scheme, discounts and savings Hub, Kids Pass etc 

Senior Mechanical Engineer responsibilities:

  • Report to the Principal Engineer, Design Managers, Technical Discipline Lead, and Regional Discipline Lead.
  • Produce cost-effective design layouts that meet specification requirements and can be constructed and commissioned efficiently.
  • Prepare and check all design deliverables, including specifications, schedules, drawings, and calculations.
  • Collaborate with other disciplines to develop comprehensive site and plant 3D models.
  • Utilise standard designs and established best practices wherever possible.
  • Deliver design-stage outputs within agreed timescales and budgets.
  • Coordinate design deliverables across all technical disciplines.
  • Provide estimates and technical feedback to the Proposals team.
  • Build effective working relationships with construction teams and supply chain partners to promote buildability and design efficiency.
  • Follow established procedures and processes to support ongoing departmental development.
  • Assist in the creation, improvement, and review of departmental procedures and processes.
  • Maintain accurate files and records throughout each contract’s duration.
  • Support customer satisfaction by maintaining a customer-focused approach, recognising that customers include internal teams as well as end users.
  • Assist in supervising and developing junior staff.
  • Help ensure a safe working environment for all team members.
  • Minimise waste across all departmental activities.
  • Ensure design solutions address environmental considerations.
  • Ensure all designs fully comply with CDM 2015 Regulations and health and safety requirements.

Senior Engineer Mechanical requirements:

  • Demonstrable experience and knowledge of engineering principles, including structures, materials, hydraulics, and environmental engineering.
  • Strong understanding of water and wastewater treatment processes.
  • Experience managing and mentoring staff in the design of discipline-specific elements for water and wastewater treatment plants.
  • Membership of a relevant professional institution chartered or working towards chartership.
  • Preferred: Degree in a relevant engineering discipline.
  • Minimum: HND in a relevant engineering discipline.
  • Ability to rationalise designs and develop cost-effective plant layouts.
  • Broad knowledge of all aspects of water treatment, including mechanical, process, and electrical engineering, as well as project management.
  • Working knowledge of roles and responsibilities under CDM 2015 Regulations.
  • Familiarity with industry standards (e.g., BS, WIMES, BSRIA), regulatory requirements (PUWER, LOLER, PSSR 2000, DSEAR), and water quality regulations such as The Water Supply (Water Quality) Regulations 2016 (Reg31) and guidance from the Drinking Water Inspectorate (DWI).
  • Proficient in relevant computer applications.
  • Full driving licence.

If you are looking for a fantastic Senior Mechanical Engineer opportunity and want to work for a leading national contractor with opportunities to progress, then click on the ‘apply now’ button.
 
Due to the high volume of applications, we receive we are not always able to reply to all applications. If you haven’t heard back from us within 2 weeks, then please accept that your application has been unsuccessful for the role we currently have advertised.
 
Please note that no terminology in this advert is intended to discriminate on the grounds of a person’s gender, marital status, race, religion, colour, age, disability or sexual orientation. Every candidate will be assessed only in accordance with their merits, qualifications and abilities to perform the duties of the job. Finlay Jude Associates Ltd acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers