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DIEM Ltd was established in 2005 by David Inman FRICS CEnv and we've grown steadily by delivering high quality, results-driven consultancy to elite commercial clients across the UK and globally, alongside major UK public-sector organisations including the NHS, universities, and local authorities.
We turn FM, ESG, and sustainability into measurable business advantages through practical, ISO-aligned strategies (ISO 14001, ISO 50001, ISO 45001, ISO 9001 & more) that enhance resilience, reduce energy consumption and waste, ensure compliance, and future-proof assets. Proven with world-class clients and landmark projects:
Every engagement upholds RICS regulated standards, full professional indemnity, and our core commitment: environmental stewardship that delivers real value, from net-zero pathways and energy optimisation to workplace excellence. With David's 25+ years of frontline experience, from multimillion-pound rail upgrades to international ESG rollouts , plus RICS APC leadership, isurv contributions, and published work on circular economy & embodied carbon, DIEM Ltd brings unmatched authority and care to every challenge. Guided by our core ethos of value above fees, we prioritise long-term client success by delivering high-impact, expert solutions. Partner with proven expertise. Build safer, greener, higher-performing operations today. 
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David Inman FRICS CEnv PISEP PCQI is director and Chartered Environmental Surveyor and Chartered Environmentalist at DIEM Ltd, based in Formby, Merseyside.
He is a Fellow of the Royal Institution of Chartered Surveyors (FRICS) and Chartered Environmentalist (CEnv). With over 25 years of experience in commercial real estate, facilities management, construction, environmental leadership, and sustainability, David Inman FRICS CEnv stands as one of the UK's most authoritative Chartered Surveyors in delivering transformative, standards-driven solutions. He delivers strategic FM, real estate, business management and ESG consultancy to major UK clients and key highlights include
With senior experience on landmark projects, David provides authoritative, results-driven guidance to optimise estates, reduce risks, and advance net-zero goals. He currently sits on the RICS Land and Natural Resources Professional Group Panel, is a RICS APC Assessor Chairman. He has previously sat on RICS UK Education Standards Board, RICS North West Regional Board plus was Chairman of RICS Lancashire Local Association and RICS Lancashire Matrics. In 2019 David was appointed a Director of the charity The Mersey Gateway Environmental Trust. Partner with proven expertise for smarter, sustainable business, FM and real estate. 
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Local delivery, global reach
DIEM Ltd has supported UK based Clients on their worldwide operations.
DIEM Ltd has supported UK based Clients on their worldwide operations.