Andrew Leslie qualified as an architect but began specialising in design and construction health and safety in 1995 and became a member of APS the same year. Between spells working as a designer and CDM Consultant, during which he developed and delivered CDM training courses, he has built up experience working with several Membership organisations.

Andrew joined APS in 2014 as Technical and Standards Manager and was principal co-author of the APS’ Principal Designers Handbook. Shortly after the book was published, in 2016 he returned to consultancy to develop CDM support services and training and working extensively on regeneration projects in London and SE England. During this period, he became heavily involved in the post-Grenfell developments leading up to the Building Safety Act and secondary legislation in England.

Andrew re-joined APS as Head of Membership in 2021. Working on member services and accreditation schemes, he was part of the team delivering webinars on the Building Safety Bill/Act and secondary legislation. and was part of the working group that developed the Principal Designer Building Regulations (England) competence scheme. Andrew became Interim CEO in May 2024; the post being made permanent in October 2024, and together with the Board of Directors is working to position APS as the leading professional body delivering on Building Safety and regulatory compliance in the Built Environment.

Mark Snelling MCIOB, CertIOSH, FAPS, started in construction, setting up his own construction health and safety consultancy in 1995. He is President of the Association for Project Safety, a founder director of the Building Safety Alliance and the health, safety and fire consultant to the Property Institute. Since 2021 he has worked in building safety providing guidance, consultancy and training to professional bodies and others. His current focus is on competence and competence management which has included his membership of British Standards Institute [BSI] steering committees developing competence frameworks and standards including BS8670, PAS 8671, PAS 8763, and BS 8674. He is a member of the new industry organisational capability standard steering group and BSI’s CPB/1 Committee which is responsible to the BSI Standards Policy and Strategy Committee (SPSC) for standardization needs for competence in the built environment.