Senior Mechanical Engineer

Mott MacDonald Bentley | MMB; Reading; On-site; GBP 55,000 - 75,000; Full time

Benefits offered by this job

Pension match 4.5–7%

Annual bonus scheme

Professional subscriptions coverage

Flexible working

Job summary

Mott MacDonald Bentley is recruiting a Senior Mechanical Engineer to shape mechanical design for water and wastewater projects in the UK. You will contribute from concept through commissioning, ensuring integration with electrical, civil and process disciplines and supporting client objectives.

Join a joint venture delivering major water schemes in Thames Valley and beyond, with development opportunities toward chartership and a strong focus on health, safety and professional growth.

Qualifications

• Degree in Mechanical Engineering is required.
• Working towards IEng/CEng with a recognised engineering institution.

Responsibilities

• Develop the mechanical design of water and wastewater infrastructure through outline and detailed design, construction, commissioning and handover (including P&IDs, valve schedules, pump calculations, safe access and lifting layouts).
• Coordinate with Electrical, Civil, Geotech and Process designers to deliver on programme, budget and quality.
• Collaborate with commercial, operational and construction teams to deliver practical, safe solutions throughout design, build and commissioning.
• Engage with the client to manage relationships and support their aims as part of the one-team approach.

Skills

Degree in Mechanical Engineering

IEng/CEng (working towards)

Communication

Problem solving

Driving licence

Water/wastewater experience

Education

Degree in Mechanical Engineering

Job description

Internal applications are welcome

Mott MacDonald Bentley is a fully integrated design and build business combining the design expertise of Mott MacDonald with the contracting experience of JN Bentley to deliver award winning projects. With an annual turnover surpassing £500 million, Mott MacDonald Bentley cements its position as a leader within the industry. The sustained, robust business performance creates an ideal environment for career growth.

MMB has extended its contract with Thames Water for an additional five years. As the largest water and wastewater provider in the UK, Thames Water serves 15 million customers throughout London and the Thames Valley. This extension will carry the current workload beyond the end of AMP8 in March 2030. We are delivering work in the Thames Valley region (extending from Cirencester in the west to the M25 and from Basingstoke in the South to Banbury in the North). This sees us undertake a varied programme of sizable projects in wastewater treatment, clean water production and Infrastructure (Water and Wastewater networks).

As a Senior Mechanical Engineer you will contribute to projects that significantly impact our environment and communities. Working primarily in the UK water market, MMB provides the feasibility, design, construction, and commissioning services needed to keep water flowing and wastewater treated. You’ll work on projects that make a real difference to our environment and our communities by enhancing the efficiency and effectiveness of water and wastewater treatment systems.

You will play a pivotal role in shaping the mechanical functions throughout the lifecycle of various projects. From concept design to commissioning, you will ensure that all mechanical aspects are meticulously considered and integrated.

The role of a Senior Mechanical Engineer includes:

• Develop the mechanical design of water and wastewater infrastructure and non-infrastructure projects through the outline and detailed design, construction, commissioning, and handover, including, but not limited to, P&IDs, valve schedules, pump calculations, defining safe access and lifting arrangements, above ground pipework layouts, etc.
• Coordinate with the project team comprising of Electrical, Civil, Geotech and Process designers and ensure designs are completed on programme, within budget, and to the quality defined by framework specifications.
• Working closely and collaboratively with the commercial, operational and construction teams to develop efficient, practical and safe solutions throughout design stages, construction and beyond
• Positively engage with the client, managing relationships and adopting a one-team approach to supporting them in achieving their aims.

What you’ll need:

• Degree in Mechanical Engineering, or related field
• Working towards IEng / CEng with a relevant Engineering Institution
• Ability to communicate effectively with team members and stakeholders
• Methodical approach to problem solving
• A valid driving licence and willingness to travel to sites across your operational region
• Water/wastewater experience required

What’s in it for you:

Financial wellbeing

• MMB match employee pension contributions between 4.5% and 7%.
• As an independently owned business we share the financial success of the business with all our colleagues including our annual bonus schemes.
• Payment of annual professional institution subscription costs

Health and wellbeing

• A minimum of 33 days holiday each year, inclusive of public holidays, with the ability to buy, sell or carry over annual leave through our flexible benefits programme.
• Access to Life Assurance / Private Medical Insurance / Critical Illness Insurance and Health Screening options
• We are happy to talk openly about flexible working and how we can support your responsibilities beyond the workplace.
• Join a wide range of groups including our Advanced Employee Networks which support our LGBTQ+, gender, race and ethnicity, disability, and parents/carers communities.

Enhanced family and carers leave

• Enhanced family leave policies, including 26 weeks paid maternity and adoption leave, and two weeks paid paternity/partner leave plus the option for shared parental leave.
• Up to 2 paid additional days leave are provided for those with significant caring responsibilities

Learning and development

• MMB are committed to empowering our people to grow professionally and thrive in their careers. We offer structured development schemes that support your journey toward professional chartership. From day one, employees are fast-tracked towards chartership reviews and benefit from mentorship, hands‑on experience, and tailored training opportunities

Mott MacDonald Bentley are not currently offering sponsorship to candidates under the Skilled Worker visa route in the UK. This decision is as a consequence of the changes made to the Skilled Worker route by the UK Government in April 2024. We continue to welcome applications from candidates who are eligible for alternative immigration routes in the UK, that do not require sponsorship as a Skilled Worker now or in future.

Other Information

This is a Mott MacDonald Bentley role, employed by Mott MacDonald.

Mott MacDonald Bentley is a joint venture business, established in 1999 between civil engineering contractor JN Bentley and global management consultancy, Mott MacDonald.

Mott MacDonald Bentley offers fully integrated design and build services to its clients, combining the contracting expertise of JN Bentley and the design specialisms of Mott MacDonald.

This role is employed by Mott MacDonald but will involve working across the joint venture business, both with Mott MacDonald and JN Bentley colleagues.

About Mott MacDonald

Mott MacDonald is a global engineering, management and development consultancy.

Our purpose is to improve society by considering social outcomes in everything we do, relentlessly focusing on excellence and digital innovation, transforming our clients’ businesses, our communities and employee opportunities.

A fundamental part of this is respecting each person’s differences and striving to meet their needs