Leo A Daly has appointed Isaiah Johnson as a senior aviation planner to its Washington office.

Johnson, who has more than 23 years experience planning and designing airport facilites, will be based at the company's Washington office and will provide airport terminal planning, programme and project management expertise

Previously a vice president at HNTB, Johnson is an associate of the American Institute of Architects (AIA) and has worked on projects at Atlanta Hartsfield, Washington Dulles and Philadelphia international airports.

"Isaiah's broad range of aviation projects and client relationships will help in the growth and positioning of one of our firm's key sectors. His depth of experience and knowledge adds yet another layer of strength to our aviaton team in the Washington office," said Alan Feltoon, vice president and managing principal of Leo A Daly.