Senior CFD Engineer

RJM International; Winchester; On-site; GBP 50,000 - 75,000; Full time

Job summary

A leading engineering technology company is seeking a Senior CFD Engineer to lead advanced CFD analysis for low-carbon energy solutions. This role involves collaboration across teams, optimizing plant performance, and developing innovative combustion technologies. Join a pioneering team dedicated to making energy cleaner and more efficient globally.

Benefits

Subsidised private healthcare

Discretionary bonus scheme

Flexible working opportunities

Global career opportunities

Qualifications

• 7+ years in industrial CFD, ideally within power generation.
• Strong proficiency in ANSYS Fluent for combustion analysis.
• Ability to validate and optimize CFD models using real-world data.

Responsibilities

• Lead CFD simulations for combustion and emissions control.
• Conduct process calculations and engineering assessments.
• Act as a mentor to junior engineers.

Skills

Collaboration

Problem Solving

Communication

Education

MEng or PhD in Chemical, Process, or Mechanical Engineering

Tools

ANSYS Fluent

SpaceClaim

Design modeller

Job description

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Director of Operations // Mechanical Engineer // Thermal Plant Specialist

Why Join RJM?

At RJM International, we are at the forefront of the global energy transition. As a world-leading engineering technology company, we enable energy producers to achieve efficient, reliable, and cost-effective low-carbon power generation—and we’re growing to meet demand.

• Helping existing energy assets reduce harmful emissions and improve efficiency, ensuring they remain a viable source of reliable power.
• Driving innovation in biomass and Energy from Waste to enhance reliability and performance in the next generation of power solutions.

Our work is complex, bespoke, and pioneering. We don’t just optimise existing systems – we invent new ones. Our track record of innovation has earned us industry recognition, including the prestigious Queen’s Award for Enterprise: Innovation.

At RJM, you’ll be working with a team of experts on high-impact projects worldwide, tackling some of the most pressing energy challenges of our time. We operate across multiple sectors, from utility-scale power generation to industrial energy users, handling everything from 1,000MWe power units to 100MW gas-fired boilers. Our expertise spans all fuel types and all firing systems, with a particular focus on biomass and Energy from Waste solutions.

With offices in Winchester, Singapore, Malaysia, and the USA, we offer global opportunities for ambitious engineers who want to expand their expertise and make a real impact on the future of energy.

Senior CFD Engineer – Reinvent the Future of Energy

Are you a highly skilled CFD Engineer looking for an opportunity to develop cutting-edge combustion and emissions reduction solutions? RJM International is seeking an experienced Senior CFD Engineer to lead advanced CFD analysis, develop innovative combustion system designs, and contribute to the future of low-carbon energy solutions.

In this role, you will lead CFD analysis and solution design, collaborating closely with Process, Mechanical, and Business Development teams, playing a key part in optimising plant performance, reducing emissions, and developing new combustion technologies. You'll also have opportunities to engage in R&D initiatives, support commissioning activities, and work directly with clients to develop tailored solutions.

What You’ll Be Doing

Advanced CFD Analysis & Engineering

• Lead CFD simulations for combustion and emissions control in power generation projects.
• Perform detailed reacting and non-reacting fluid flow analysis using ANSYS Fluent.
• Develop and enhance CFD capabilities, continuously improving methods and approaches.
• Conduct process calculations and engineering assessments to validate CFD results.
• Design and optimise ultra-low NOx burners firing coal, biomass, oil, gas, and hydrogen.
• Maintain accurate documentation and ensure best practices are followed.
• Work closely with process and mechanical engineers to develop combustion solutions.
• Engage with clients and project teams to present findings, solutions, and recommendations.
• Support Business Development efforts by providing technical input for proposals and client discussions.
• Assist in preparing quotations, project resource planning, and progress reporting.

Technical Leadership & R&D

• Act as a mentor to junior engineers, providing training and technical guidance.
• Explore new CFD techniques and develop methodologies for combustion simulation.
• Support R&D initiatives by proposing and developing new technologies.
• Support site-based diagnostic testing, commissioning, and design verification.

What We’re Looking For

We value talent and expertise, but we also recognize potential. If this role excites you but you don’t meet every requirement, we’d still love to hear from you.

Must-Haves:

• MEng or PhD in Chemical, Process, or Mechanical Engineering, ideally with a combustion focus.
• 7+ years in industrial CFD, ideally within power generation, emissions control, or combustion R&D.
• Strong proficiency in ANSYS Fluent for combustion analysis.
• Proficiency in 3D model and mesh generation (SpaceClaim, Design modeller, Fluent meshing) and optimization for large-scale models.
• Strong understanding of thermodynamics, fluid mechanics, and combustion chemistry.
• Knowledge of turbulence models, chemical kinetics, radiation heat transfer, and multiphase flows.
• Ability to validate and optimize CFD models using real-world data.
• Experience with High-Performance Computing (HPC) clusters in Linux & Windows environments.
• Ability to present complex technical solutions to clients and stakeholders.
• Strong collaboration and communication skills across multidisciplinary teams.
• Proven ability to manage time and resource to meet deadlines in a commercial environment.
• Strong verbal and written English language skills for preparing technical presentations and reports.
• Prior experience CFD modelling a wide variety of boiler types and firing system designs.
• Ability to analyse emissions formation (NOx, CO, SOx, particulates, etc.) and propose solutions.
• Programming skills (Python, C++, FORTRAN, or VBA) for CFD automation.
• Understanding of plant thermal performance and root cause analysis techniques.
• Ability to read and interpret engineering drawings to create geometric models.
• Comfortable with multi-tasking, leading and prioritising activities, and working autonomously.
• Strong problem-solving skills with a proactive, hands-on approach to engineering challenges.
• Chartered Engineer status (or actively working towards it).
• Full UK driving license and additional language skills are a plus.

Why RJM?

We invest in top talent and offer:

• Subsidised private healthcare
• Discretionary bonus scheme
• Flexible working opportunities
• Global career opportunities & continuous development

Join RJM and lead projects that are making energy cleaner, more efficient, and more sustainable.

Ready to take the next step? Apply now!

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering, Research, and Science

• Industries

  Electric Power Generation, Oil and Gas, and Engineering Services

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