Queensland firm McInnes Wilson Lawyers has promoted two of its team to the position of principal for the new financial year.

Gerard Timbs will head the firm's planning and environmental law practice. He has 10 years' experience in the field and prior to becoming a solicitor was a certified town planner.

Peter Seymour, a personal injuries litigation specialist, will join Chris McManus in leading the Brisbane personal injuries team.

The promotions bring the firm's total of principals to 21.