Senior Process Engineer

Company: Addison Project
Apply for the Senior Process Engineer
Location: Harlow
Job Description:

Senior Process Engineer – Addison Project, Harlow

For over 25 years Addison Project plc has delivered innovative, sustainable engineering solutions across the chemical, pharmaceutical, energy, and food & beverage sectors. As a family‑owned business with UK‑wide coverage, we combine technical excellence with a collaborative, client‑focused approach. Our fully integrated EPCM capability supported by strong CDM and HSSEQ leadership and accredited management systems ensures projects are delivered safely, efficiently, and to the highest standards from concept through to commissioning and start‑up. If you’re passionate about engineering and want to join a dynamic, people‑focused consultancy driving progress and sustainability across the UK’s manufacturing and process industries, Addison Project is the place to grow your career.

Role: Senior Process Engineer (Contract – Outside IR35). Location: Harlow. Contract: 12 months. Start Date: Spring 2026.

Scope of Services

  • Producing process calculations, datasheets and equipment specification sheets
  • Developing PFDs and P&IDs
  • Producing alarm/trip schedules and cause & effect diagrams
  • Generating process reports and control philosophies
  • Supporting plant troubleshooting activities
  • Producing equipment, piping, valve, inline item and instrument schedules
  • Checking and approving technical documents
  • Liaising with vendors and reviewing vendor information
  • Participating in HAZID/HAZOP/LOPA reviews
  • Completing Hazardous Area Classification and DSEAR assessments

Experience & Qualifications

  • Chemical Engineering degree (essential)
  • Chartered Engineer status (desirable)
  • Strong experience within a UK onshore process engineering design team within either a petrochemical, chemical, oil & gas, pharmaceutical or food and beverage industry
  • Proven knowledge and experience of HAZOP, DSEAR and ATEX in a COMAH environment, including carrying out Hazardous Area Classification Assessments
  • The ability to lead HAZOP Studies (desirable)
  • Ability to work to a high level of autonomy and to produce high quality results
  • Passion for delivering safe, fit for purpose, accurate design, completed to cost and programme
  • Ability to be adaptable and to drive progress to meet targets
  • Thorough approach with attention to detail and the ability to recognise and minimise risks
  • Ability to work in a multi-discipline team
  • Willing to lead a project with a small team; supporting less experienced engineers
  • Willing to work in the Engineering design office in Harlow and attend site as necessary in Greater London

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Posted: April 23rd, 2026