Principal Process Engineer

This job is with ARUP, an inclusive employer and a member of my Gwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly.

Joining Arup

Our process chemical and process engineering team comprises specialist chemical engineers, scientists and industrial experts who shape everything from conceptual design ideas through pre‑FEED and FEED to completed turnkey facilities. We support projects at all stages of delivery, ensuring safe, regulatory‑compliant solutions. We focus on design development, process optimisation, debottlenecking and control of chemical, physical, and biological processes, from hydrogen production to carbon capture and transformation through to water and wastewater treatment.

We are looking for candidates with a background in process engineering design on multidisciplinary projects within the municipal and industrial water sectors. Our team is involved in many exciting projects across the Energy, Water and Resources sectors, supporting projects internationally and integrating with teams in offices worldwide.

As a senior engineer you will work across the project life cycle from developing concept designs to outline and detailed designs, and you will lead process engineering teams to ensure production of deliverables on established timelines and within budget.

What you’ll do

You will coordinate the work of others and liaise with engineers of other disciplines, imparting your knowledge and experience. You will work in highly regulated sectors, within a gated design and project delivery process. You will be involved in the development of mass and energy balances, process data sheets, control philosophies, and commissioning plans, as well as report writing and the development of fee proposals and feasibility studies of plant operating and capital costs.

A practical understanding of how your designs will be implemented and digital approaches to solve our problems, including the relevant current analysis and design software, is expected.

We operate a graduate training scheme accredited by the IChemE. As a senior engineer you will be expected to join the mentoring programme and help shape our future pipeline of process engineers.

You will have design experience of fixed and suspended growth systems, anaerobic treatment of biosolids and high‑strength effluent, biogas handling and upgrading, membrane separation, solids filtration, disinfection, oxygenation, thermal hydrolysis, nutrient removal processes, chemical storage and dosing systems, and experience of Haz Op, DSEAR, COMAH, SIL determination, flammable gas handling and compression.

What we’re looking for

• Degree qualified in chemical engineering or a related discipline.
• Familiarity with wastewater and/or drinking water treatment processes, including innovative technologies and approaches.
• Understanding of the municipal UK treatment landscape and UK water industry regulations and compliance standards.
• Experience with Biowin/GPS‑X modelling software.
• Experience acting as the process designer in HAZOP teams and chairing Haz Op studies, resolving technical matters, and working in highly regulated sectors.
• Development of fee proposals, creation of PID’s, plant layouts, GA and energy and mass balances.
• Experience of digital approaches to solve problems including current analysis and design software.

Unfortunately, we are unable to offer visa sponsorship for this role. Applicants must have the right to work in the UK at the time of application and for the duration of employment. Any offer made will be subject to satisfactory proof of immigration status.

What we offer you

At ARUP we care about each member’s success. We provide an attractive total reward package that recognises the contribution of every member. In addition to competitive, fair and equitable pay, we offer a career where all members can belong, grow and thrive – through benefits that support health and wellbeing, a wide range of learning opportunities, and many possibilities to have an impact through the work you do.

We provide private medical insurance, life assurance, accident insurance and income protection cover, and flexible…