In 2009, Hee Young Park's best finish was second at the Honda LPGA Thailand, where she carded a career-best and course record 64 in the second round, and tied for second at the Mizuno Classic, where she crossed the $1 million mark in career earnings.

Also tied for fifth at the LPGA Tour Championship Presented by Rolex, tied for sixth at the Sybase Classic Presented by ShopRite, tied for ninth at the U.S. Women's Open and tied for 10th at the P&G Beauty NW Arkansas Championship Presented by John Q. Hammons; carded 64 again the first round of the LPGA Corning Classic where she tied for 14th.

In 2008, carded a tie for fourth at the Bell Micro LPGA Classic; recorded three additional top-10 finishes: a tie for sixth at the Evian Masters and tie for ninth at both the Safeway International Presented by Coca-Cola and Stanford International Pro-Am.

In 2007, competed on the Korea LPGA (KLPGA); finished third at the LPGA Final Qualifying Tournament to earn exempt status for the 2008 LPGA season.

In 2005, played on the KLPGA and won three events en route to being named the 2005 KLPGA Rookie of the Year.

In 2004, turned professional in November after winning the Hite Cup on the KLPGA.