Established in 2007 by Andy Heyne, Mark Tillett and Tom Steel, Heyne Tillett Steel is an engineering practice with offices in London and Manchester.

The practice is a Certified B Corporation employing over 180 staff who work with developers and architects on projects spanning structural, civil, transport and geotechnical engineering.

Pictured above is Walworth Town Hall in London, UK, which underwent refurbishment by the practice in 2013.

Heyne Tillett Steel is featured in the Dezeen Jobs Top Companies 2026 list, highlighting studios that set new standards in workplace culture, inclusivity, wellbeing and professional growth. Find out more about the initiative here.