Mahannah is the son of the late C. Mark Mahannah and president of Mark Mahannah & Co., which has been designing golf courses for 60 years. The company has designed 47 golf courses, including the Jacaranda and Bonaventure courses in Fort Lauderdale, the Boca Teeca in Boca Raton and the Royal Palm Beach course in Palm Beach.

Mahannah specialty is designing courses that have mass appeal. This means making the experience enjoyable for all levels of golf. Focusing on match play, it's essential to give both high and low handicappers a fair chance at winning each hole. Understanding the love of match play, Mahannah applies this fairness mindset to all his designs.