Boston-based architecture and engineering design firm Einhorn Yaffee Prescott Architecture & Engineering P.C. (EYP) has hired three new employees.

Jason Olsen has been named senior designer and associate. He has more than 10 years of design experience. A licensed architect, Olsen is a member of the American Institute of Architects and a LEED-Accredited Professional.

Desmond McAuley has been named senior designer and senior associate. He comes to the firm with more than 22 years of architectural experience. A LEED-Accredited Professional, he is a member of the Boston Society of Architects, American Institute of Architects, the National Council of Architectural Registration Boards and the Royal Institute of the Architects of Ireland.

Kelly Baldarelli joined the firm as an executive assistant. With more than 20 years of experience, her responsibilities include a variety of administrative support tasks, specifically for EYP’s vice president of design and expertise.