Hehn Trickey Professional Corporation is licensed public accounting firm that has been providing accounting, assurance and taxation services to Simcoe County since 2005 when its predecessor firm T. J. Hehn and Associates was started by Terry Hehn with the assistance of Debbie Trickey and Nynka Greer.

In 2008, Debbie Trickey became a partner and the firm name was changed to Hehn Trickey Professional Corporation. Jennifer Man joined the firm in January 2015.