A locally owned design firm is marking its 25th anniversary with a new leadership team in place.

Arrington Watkins Architects, which has an office at 5240 N. 16th St., recently celebrated with its seven new principals. They are Mike Conder, managing principal; Matthew Gorman, managing principal; Mike Quinn, managing principal; Michelle Diaz, principal/business manager; Peter Sangiorgio, principal architect; Kyle Swanson, principal architect and Patricia Thornton, principal architect. Lynn Arrington and David Watkins started the firm in 1994. Thornton, Diaz and Sangiorgio live in Phoenix.