Location/s: Leicester / Croydon UK

Relocation supported: Not supported, but internal applications are welcome

Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices.

We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance – we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual.

Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you're surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee-owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued. Whatever your ambition, Mott MacDonald is where people come to be brilliant.

About the business unit

The Energy unit delivers services to clients globally across several sectors including energy transition, hydropower, nuclear, waste, renewable generation and transmission & distribution networks. Together we provide integrated engineering and project management services across the project lifecycle – from concept and design to construction and operations, to decommissioning or repowering and life extension. Together with our clients, we're helping to deliver the energy transition globally.

Overview of the role

As part of our growing Energy Transition business,



you will play a key role in supporting our expanding portfolio of low‐carbon and future‐fuel projects across the UK and internationally. From concept development to detailed engineering and through to construction and operational support, you will help deliver the infrastructure needed for a modern, sustainable energy system.

As a Principal Pipeline Engineer, you will lead the technical development of pipeline systems across our energy transition portfolio, which spans natural gas at a range of pressures, hydrogen, carbon dioxide transport, and wider future-fuels applications.

As a key technical leader, you will guide multidisciplinary teams, mentor engineers, and work closely with clients, construction teams, and regulatory bodies to deliver high-quality engineering outcomes.

Working within a large and well-established engineering practice, you will engage with clients throughout the full project lifecycle—from early feasibility and FEED through to detailed design, construction and commissioning.

Our team works with private developers, utilities, government bodies, funders, EPC contractors and OEMs, enabling you to apply your expertise across a diverse range of projects and technologies. You will help deliver creative, first-of-a-kind solutions alongside more established energy infrastructure schemes, contributing to the transition towards a low-carbon future.





Key responsibilities and duties include:

- Technical Leadership
- Serve as the subject matter expert for onshore pipeline design, integrity, and operation
- Lead the development and review of pipeline engineering deliverables including FEED, detailed design, specifications, and technical reports
- Ensure designs comply with all relevant codes, standards, and regulatory requirements

- Project Delivery

- Oversee pipeline engineering activities across multiple projects, ensuring scope, cost, quality, and schedule targets are met
- Provide technical direction to engineering teams, subcontractors, and third-party specialists
- Support project risk assessments, constructability reviews, HAZOP/HAZID workshops, and design reviews

- Stakeholder Management

- Act as the primary pipeline engineering contact for clients, partners, and regulatory authorities
- Present technical solutions and recommendations to senior stakeholders and project leadership

- Innovation & Continuous Improvement

- Drive engineering excellence, championing digital tools, new design methodologies, and operational best practices
- Mentor and develop early career professionals, fostering a culture of learning and innovation

Candidate specification

Essential:

- Degree in a relevant engineering discipline
- Relevant experience in pipeline engineering
- Chartered status with relevant professional body (or equivalent experience with progress toward chartered status)
- Proven experience delivering pipeline FEED, detailed design, construction support, and integrity management in the energy sector
- Strong understanding of fluid mechanics, hydraulic modelli

📌 Principal Pipeline Engineer (Croydon)
🏢 Mott Macdonald
📍 Croydon