Building Physics Modelling Engineer

SNC-Lavalin; City Of London; Hybrid; GBP 50,000 - 70,000; Full time

Job summary

A leading engineering firm in the UK is seeking a Principal Engineer/Technical Authority to drive sustainability initiatives across various sectors. The role involves developing energy strategies, collaborative project management, and staying current with best practices in modelling. The ideal candidate has a degree in a relevant field, strong technical knowledge, and excellent mentoring capabilities. This position supports flexible working arrangements and continuous professional development.

Benefits

Flexible working arrangements

Training and professional development opportunities

Competitive salaries and employee rewards

Qualifications

• Strong technical knowledge of UK and EU standards, especially Building Regulations.
• Experience in developing energy strategies and dynamic modelling.
• Professional memberships such as CIBSE, IET, or IMechE are advantageous.

Responsibilities

• Develop early-stage operational energy strategy models.
• Lead technical projects, managing resources and producing reports.
• Engage with the Global Technical Centre for project enhancement.

Skills

Technical knowledge of UK and EU standards

Expertise in passive design and energy-efficient solutions

Proficiency in IES-VE

Strong communication and reporting skills

Team-oriented mindset

Adaptable and culturally aware

Education

Degree in mechanical engineering or building physics

Tools

IES-VE

SAP

CFD

Therm

PHPP

Job description

Job Description

Transform how organisations reach net zero.

Are you ready to take up a vital role in shaping some of our exciting projects? How about joining our talented team, where everyone has a voice, and together we face our clients' problems head-on. It is a diverse and inclusive work environment where world‑class talent knows no distinctions.

We know that different people have different priorities, which is why we’re here to support you. Flexible and remote working is a central part of our culture. Talk to us about what’s ideal for you – from reduced weeks to buying more leave over school holidays. And if you’re returning from a career break, ask us how we can help you transition back into work with us.

Bring your skills to the mix as a Principal Engineer/Technical Authority. You’ll play a vital role, collaborating with clients and design teams around the UK. Our Sustainability practice leads the way in innovation, transformation and digital on the path to Net Zero. Lead carbon management and sustainability integration across Aviation, Defence, Energy, Cities & Development, Education, Rail, and Water. We’re big on expertise but not on hierarchy. Trust you with more responsibility faster, supporting your career to the next level.

Your role

• Develop early‑stage operational energy strategy models to inform design decisions.
• Collaborate with digital teams to create, test, and deploy in‑house modelling tools.
• Conduct advanced IES modelling assessments, including compliance checks (Part L, TM52, TM59, TM54, ASHRAE 90.1), daylighting, and wind studies.
• Lead technical projects, managing resources and producing detailed reports on review and interdisciplinary impacts.
• Act as Project Leader for Building Physics initiatives, ensuring quality and timely delivery.
• Report progress and issues to the Building Physics Lead, maintaining transparency and accountability.
• Engage with AtkinsRéalis Global Technical Centre to enhance project value through international collaboration.
• Stay current with modelling best practices and emerging technologies to improve project outcomes.
• Boost team productivity and quality by implementing processes, training, and software interoperability (e.g., Revit to Dialux, IES).
• Support team development, including mentoring junior staff and expanding modelling expertise across tools like IES‑VE, SAP, CFD, Therm, and PHPP.

About you

• Strong technical knowledge of UK and EU standards, Building Regulations (especially Part L), and building services systems.
• Expertise in passive design and energy‑efficient solutions, with experience in developing energy strategies and dynamic modelling.
• A degree in mechanical engineering or building physics.
• Proficiency in modelling tools and assessments (e.g., IES‑VE, SAP, CFD), with the ability to manage scope and resources effectively.
• Professional memberships (CIBSE, IET, IMechE) and Low Carbon Energy Assessor status are advantageous.
• Strong communication and reporting skills, with high literacy and the ability to author technical reports.
• Team‑oriented mindset, with mentoring capabilities and a supportive approach to junior staff development.
• Logical and solution‑driven, with a passion for improving building performance and contributing to digital transformation and net zero goals.
• Adaptable and culturally aware, able to work across diverse teams and client environments.
• Security clearance eligibility and UK passport holder, with a confident, professional, and proactive attitude.

Reward & benefits

Explore the rewards and benefits that help you thrive – at every stage of your life and your career. Enjoy competitive salaries, employee rewards and a brilliant range of benefits you can tailor to suit your own health, wellbeing, financial and lifestyle choices. Make the most of an array of opportunities for training and professional development. Combine our hybrid working culture and flexible holiday allowances to balance a great job and fulfilling personal life.

About AtkinsRéalis

We’re AtkinsRéalis, a world‑class engineering services and nuclear organization. We connect people, data and technology to transform the world's infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. We’re committed to leading our clients across our various end markets to engineer a better future for our planet and its people.

Additional information

Security clearance

This role may require security clearance and offers of employment will be dependent on obtaining the relevant level of clearance. If this is necessary, it will be discussed with you at interview. The vetting process is delivered by United Kingdom Security Vetting (UKSV) and may require candidates to provide proof of residency in the UK of 5 years or longer. If applying to this role please do not make reference to (in conversation) or include in your application or CV, details of any current or previously held security clearance.

We are committed to creating a culture where everyone feels that they belong – a place where we can all be ourselves, thrive and develop to be the best we can be. So, we offer a range of family‑friendly, inclusive employment policies, flexible working arrangements and employee resource groups to support all employees.

As an Equal Opportunities Employer, we value applications from all backgrounds, cultures and ability.

#LI-INFRASTRUCTURE | #LI-UK