Senior Process Engineer, Water

AECO; Leeds; Hybrid; GBP 55,000 - 75,000; Full time

Benefits offered by this job

Hybrid working model

Career development opportunities

AECOM University

Volunteering days

Job summary

AECOM is seeking a Senior Process Engineer to join our Water Team with opportunities to work across our UK offices in Birmingham, Chesterfield, Leeds and Manchester. The role offers flexible hybrid working and a chance to shape major water infrastructure projects.

You will design and review wastewater and water processes, perform hydraulic calculations, mentor junior staff, and collaborate with clients and other disciplines to deliver high‑quality solutions that meet standards and timelines.

Qualifications

• Proven design experience in water and wastewater engineering deliverables.
• Chartered (or near Chartered) membership of a relevant institution.
• Experience managing projects and mentoring junior staff.

Responsibilities

• Design and review process elements for water/wastewater projects, including site surveys and calculations.
• Coordinate across disciplines and engage with clients to deliver technical solutions.
• Support bids, develop designs from feasibility to construction, and ensure standards compliance.
• Mentor junior engineers and contribute to digital tool adoption (BIM, ProjectWise, P&ID tooling).
• Produce calculations, drawings and technical reports in line with procedures.

Skills

Water/wastewater design

Hydraulic calculations

Mentoring junior staff

Client liaison

Education

BEng or MEng in a related field

Chartered or near Chartered

Tools

BIM

ProjectWise

P&IDs

Job description

• Legal Entity: AECOM Infrastructure and Environment UK Limited
• Business Line: Water
• Work Location Model: Hybrid
• Operating Group: International
• Primary Location: UK - Chesterfield

Company Description

Work with Us. Change the World.

At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.

There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.

We're one global team driven by our common purpose to deliver a better world. Join us.

Job Description

Start here. Grow here.

Are you ready to shape the future of water infrastructure?

We are looking for a Senior Process Engineer to join our established and growing Water Team with opportunities to be based across our North and Midlands offices - Birmingham, Chesterfield, Leeds and Manchester- while also benefiting from our flexible hybrid working model.

Here's what you'll do:

Process Design

• Undertake the design and review of process elements in wastewater and water infrastructure / treatment projects, including:
  • Site visits to carry out site surveys and the support of liaisons with clients, contractors & suppliers
  • Hydraulic assessments and calculations
  • Existing process capacity assessments and basis of design development
  • Process equipment design
  • PFDs (Process Flow Diagrams)
  • P&IDs (Piping and Instrumentation Diagrams)
  • Mass/Energy balances Headloss calculations and pumping system analysis
  • Prepare documents such as Hazardous Area Classification and Layer of Protection Analysis (LoPA)
  • Participate in safety reviews, including HAZOP (Hazard and Operability Study) and HAZID (Hazard Identification) assessments
  • Technical specifications and reports

Project Stages:

• Engage in all design stages, including Feasibility, Outline, Detail, and Construction Design, ensuring compliance with National and International Design Standards.
• Work closely with other discipline teams both locally and nationwide to deliver high-quality technical solutions.
• Communicate effectively with clients and collaborators throughout the design and planning phases.
• Delegate tasks, direct and oversee the work of others and act as a technical mentor to more junior staff.

Bid Support:

• Assist in the preparation and management of bids and proposals, interfacing with clients to understand their needs and expectations.

Project Delivery:

• Ensure the delivery of quality designs within agreed budgets and timelines, supporting a range of AECOM’s clients, including Severn Trent Water, Yorkshire Water, Wessex Water, South West Water, Southern Water, Thames Water, and Irish Water.
• Produce and review client deliverables, including calculations, drawings and technical reports to relevant standards and procedures

AECOM’s digital strategy is driving the adoption of global digital solutions internally in our design process, to improve quality and consistency and streamline activities. You will help shape these digital offerings and use them on projects, including BIM, Projectwise, intelligent P&ID’s and AECOM’s own tools developed in-house, such as our pumping station generator.

Come & Grow with Us.

Become part of our dynamic Water business, which boasts around 600 experts across the UK & Ireland, including 300 specialists across our England & Wales Water team. Collaborate with top-tier civil, mechanical, electrical, and process engineers to deliver a variety of captivating projects, from small initiatives to large-scale ventures, all the way from concept to completion. Here, you’ll thrive in an inclusive and forward-thinking environment where your contributions are valued.

Enjoy the Perks.

At AECOM you'll enjoy a range of core and personalised benefits designed to support your future and well-being, customised to fit your lifestyle. Take advantage of career development opportunities, our flexible hybrid working model to ensure a work-life balance that suits your lifestyle, technical practice networks, AECOM University, and volunteering days.

Qualifications

Ready to push the limits of what’s possible?

Here’s what we’re looking for:

• Proven experience in the design of water and wastewater engineering deliverables with multi-disciplinary knowledge, ideally including treatment schemes.
• BEng or MEng in a related engineering field with experience in water and wastewater treatment.
• Chartered (or near Chartered) Member of a relevant Professional Institution.
• Proven experience working at a senior engineer level at a consultancy within the water sector.
• Experience of managing projects, delegating tasks and technical mentoring.

Additional Information

We celebrate diversity, including neurodiversity, and believe it enriches our team. We welcome applications from all backgrounds and abilities. If you are an applicant with a disability that requires reasonable accommodation to complete the application process, please contact us [e-mail]. At AECOM, we value everyone's unique contributions and perspectives.

If you meet some of the requirements above or have transferable skills you believe would benefit us, we would be delighted to hear from you!

Interested in the role or curious about life at AECOM? Follow us on LinkedIn, Facebook, Instagram, and YouTube to explore our AECOM voices, employee stories, latest projects, and much more

At AECOM, we are committed to maintaining a secure and trustworthy recruitment process and take any fraudulent hiring activity seriously. To support this commitment, all newly hired employees are required to attend an in-person Day 1 onboarding at an AECOM office location as a condition of employment.

About AECOM

AECOM is the world’s trusted infrastructure consulting firm, delivering professional services throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. On projects spanning transportation, buildings, water, new energy and the environment, our public- and private-sector clients trust us to solve their most complex challenges. Our teams are driven by a common purpose to deliver a better world through our unrivaled technical and digital expertise, a culture of equity, diversity and inclusion, and a commitment to environmental, social and governance priorities. AECOM is a Fortune 500 firm and its Professional Services business had revenue of $16.1 billion in fiscal year 2025. See how we are delivering sustainable legacies for generations to come at aecom.com and @AECOM.

Freedom to Grow in a World of Opportunity

You will have the flexibility you need to do your best work with hybrid work options.Whether you’re working from an AECOM office, remote location or at a client site, you will be working in a dynamic environment where your integrity, entrepreneurial spirit and pioneering mindset are championed.

You will help us foster a safe and respectful workplace, where we invite everyone to bring their whole selves to work using their unique talents, backgrounds and expertise to create transformational outcomes for our clients.

AECOM provides a wide array of compensation, benefits and well-being programs to meet the diverse needs of our employees and their families. We’re the world’s trusted global infrastructure firm, and we’re in this together – your growth and success are ours too.

Join us, and you’ll get all the benefits of being a part of a global, publicly traded firm – access to industry-leading technology and thinking and transformational work with big impact and work flexibility.As an Equal Opportunity Employer, we believe in each person’s potential, and we’ll help you reach yours.

We are aDisabilityConfidentEmployer and will offer an interview to applicants who have a disability or long-term condition, who meet the minimum/essential criteria for the role. Please let us know using this email [e-mail] if you would like to apply through theDisabilityConfidentInterview Scheme.

All your information will be kept confidential according to EEO guidelines.