1963 Registered architect, New York State.
1964 Member, American Institute of Architects (currently inactive).
1965 Certified by US National Council of Architectural Registration Boards (NCARB) for registration in any US state.
1970 Registered by ARCUK (later, ARB) as an architect for practice in the United Kingdom.
1972 Became member, Royal Institute of British Architects.
1992 Became member, Academy of Experts.
1992 Associate, Chartered Institute of Arbitrators (became full member 1999).
1996 Became member, Society of Expert Witnesses.
1999 Became member, Chartered Institute of Arbitrators. (I resigned my institute membership in 2010.)
2005 Accredited by the RIBA as Client Design Advisor—representing user needs when others appoint architects.
2007 Accredited by the RIBA as Chartered Architect.