Lee started out as a long-distance track runner and represented Australia in the 5000m at the 1998 Commonwealth Games and attended his first World Athletics Championships the following year.  He was a 4X national 10,000m champion and broke the Australian record in the 5000m in 1999.  He competed for Australia two times in the World Cross Country Championships and moved up to the marathon distance in 1999 with a 2:11 performance.

He made his Olympic debut in the 2000 Olympic marathon race in Australia.  After a series of injuries, he returned and competed in the marathon at the 2003 World Championships and competed in his second Olympics at the 2004 Athens Olympics.  He made his third Olympic team and raced again in the marathon at the 2008 Beijing Olympics.

Much later, as a masters athlete (40 years old) Lee placed in the top 15 with a 2:17:52 at the 2013 Boston Marathon.

With personal bests that include 13:14 (5000m), 27:51 (10,000m), 1:01 (half marathon) and 2:09:49 (marathon), this 3X Olympian is a complete distance athlete.

He completed his elite career in 2014.

Lee owns and operates T.E.A.M – Troop Events Athlete Management and is a Race Management Company dedicated to Road, Track, XC and Trail Races in Boulder, Colorado.  T.E.A.M Boulder also provides coaching options for Youth, Teens, Community and Elite runners.  His company consistently donates considerable money to local charities each year.

Lee lives in Boulder with his wife, Freyja, their daughter Macy and their two sons, Max and Jack.