Elle Thomas, one of CIBSE's '30 under 30', on the front cover of CIBSE Journal!

Cover page to CIBSE Journal, September 2025 edition, showing faces of some of the winners of the 30 Under 30 awards.

Elle Thomas, Senior Engineer in our London office, is named among the CIBSE Young Engineers Global '30 under 30' list, an initiative showcasing the industry's brightest young engineers, on the 30th anniversary of the Young Engineers Awards. 

Elle Thomas is among the nine Ambassadors who have been recognised for redefining the industry through paying forward their experience and learning. Elle has been chosen for her commitment to inspire, mentor and lead, particularly in the field of low carbon design.

Since joining our practice in 2019, Elle has delivered a diverse range of projects, become chartered with CIBSE, co-chairs our Women and Minority Groups network, and lectures and tutors in environmental design for MSci Architecture students at the Bartlett, UCL. 

Her teaching approach, rooted in building physics principles, gives the architecture students a grounding in the importance of building services and passive design, equipping them for the design challenges they'll encounter in a changing world. Elle leads by example, listening and asking questions to fully understand the position of others before presenting considered solutions. 

"I'm honoured to have been selected by CIBSE 30 Under 30. After meeting the other winners last week, I'm feeling invigorated about the power younger engineers have to shape the industry, and I'm hopeful that we have the ambition to bring about the radical changes that are needed."

A headshot of Elle Thomas wearing a white vest top

MEng
Senior Engineer
Partner

Elle's vision of the future of building services engineering includes a shift towards a whole-building, holistic approach, and sustainability-first, with retrofit as the norm. She believes that closer collaboration with architects will achieve better outcomes for sustainability aspirations, with clients and design teams on board from the outset. She also believes that diversity will save the day, positively influencing strategy in favour of sustainable and inclusive design.

Cover page to CIBSE Journal, September 2025 edition, showing faces of some of the winners of the 30 Under 30 awards.

CIBSE Journal