Process Design Engineer

ALTEN is a global engineering and technology consultancy operating across over 35 countries worldwide. We partner with industry leaders across sectors including Aeronautics, Aerospace, Defence, Naval, Automotive, Energy, Rail, IT and many more to deliver innovative engineering solutions that drive technological advancement & support sustainable transformation.

Our teams of passionate and agile engineers work on cutting-edge projects that shape the future of technology and sustainability. At ALTEN, we empower talented engineers to innovate, solve complex challenges, and deliver impactful solutions that build tomorrow’s world—today.

Join us and start building tomorrow’s world today!

ALTEN is seeking an experienced Senior Chemical Process Engineer to support major engineering programmes across the nuclear, energy and industrial sectors. The successful candidate will lead process engineering activities through concept, optioneering, feasibility and detailed design phases, supporting the development of complex process and utility systems within large‑scale infrastructure projects.

This role requires strong process design capability, systems thinking, and the ability to evaluate and justify engineering solutions through structured decision‑making methodologies.

Key Responsibilities:

• Lead process engineering studies from concept through detailed design.
• Conduct optioneering and trade‑off studies using methodologies such as:
  • Pugh Matrix
  • Multi‑Criteria Decision Analysis (MCDA)
  • Gap Analysis
  • Design Option Assessments
• Develop and author:
  • Process Flow Diagrams (PFDs)
  • Piping & Instrumentation Diagrams (P&IDs)
  • System Design Descriptions (SDDs)
  • Functional Specifications
  • Process Design Basis documents
• Support implementation of systems engineering principles throughout the project lifecycle.
• Perform technical assessments and compare alternative design solutions.
• Interface with multidisciplinary engineering teams including systems, mechanical, electrical, civil and safety engineering.
• Participate in design reviews, HAZID, HAZOP and technical governance activities.
• Support stakeholder engagement and technical decision‑making.

Required Skills:

• Process design experience across water, utility, chemical, thermal, Balance of Plant (BoP), and waste/environmental systems, including treatment, distribution, storage, recovery, and sustainability projects.

Demonstrable experience in process engineering, system design, equipment specification, PFD/P&t, HAZOP/risk assessments, utility and BoP systems, multidisciplinary project delivery, regulatory compliance, and stakeholder management within highly regulated industrial environments.

Required Qualifications:

• A Bachelor’s or Master’s degree in Engineering
  , or
  equivalent
  military experience
  .
• Chartered Engineer status (or working towards) desirable.

Preferred Background in:

• Nuclear
• Energy
• Utilities
• Chemicals
• Oil & Gas
• Hydrogen
• Water Treatment
• Process Manufacturing

We bring together entrepreneurial, tech‑driven people to deliver innovative solutions for leading companies.

At ALTEN, you’ll work on exciting projects, supported by ongoing learning, mentoring, and clear career development tailored to your goals.

Join a passionate team and help build tomorrow, today.

• A personalised career path and a rewarding management style
• A huge diversity of engineering projects and industries
• Private Medical Insurance
• Employee assistance programme
• Life insurance & Pension Scheme
• Social atmosphere, regular gatherings &team buildings
• Flexible way of working (role dependent)

We are proud to support the Armed Forces Covenant & actively encourage applications from members of the Armed Forces community, including veterans, reservists, service leavers, and military spouses/partners. We…