Billy Sizeler founded I. William Sizeler & Associates in 1979 with just a handful of employees. Ian Thompson, RIBA, AIA and Thomas Brown, AIA joined the firm in 1980 and 1987, respectively. In 2006, the firm expanded its ownership and became Sizeler Thompson Brown Architects. The firm now has a staff of 32 professionals including architects, interior designers, planners, programmers and construction administrators. In the Fall of 2006, STBA once again increased their leadership appointing Allen Ohlmeyer, AIA, ACHA, ASHE and Brian Faucheux, AIA, LEED AP as principals of the firm.