Khalid hails from Lahore, Pakistan. He was the seventh of 15 children in a family that featured many prominent tennis players. He decided to take up the game of squash at age 21, and within one year earned a spot on the prestigious Pakistani National Squash Team, which competed in the 1963 British Open. Khalid eventually moved to Greenville, South Carolina, where he taught math and physics in high school while traveling to play professional tournaments. In 1971, Khalid accepted a position as Head Squash Professional at the New York Athletic Club. For six consecutive years, Khalid won the New York Professional Championship title while posting strong results in the Metropolitan Open. From 1971-1979, Khalid ranked as one of the top six pros in North America. In 1979, Mir moved his family to Portland, Oregon, where he became Head Squash Professional at the Multnomah Athletic Club. While he developed an exceptionally strong squash program, Mir found time to capture two more National titles, Men’s 45 age group in 89' and Men’s 50 age group in 1991.
Mohsen represented the U.S. on the junior squash circuit at an elite level. In 1992, he won the U.S. National Junior Championships Under-17 Division which propelled him to the U.S. Junior Team, representing his country at the 1992 World Team Championships in Hong Kong. In 1993, at age 17, Mohsen finished 3rd place at the U.S. Men's National Championships where he decided to go pro moving to France to train with the best. For the next 4 years, Mohsen toured the PSA world circuit breaking top 100. In 1995 he was awarded a bronze medal as part of the U.S. Team at the Pan Am Games in Argentina. In 1996 at 21 years of age, Mohsen came back to native grounds capturing the U.S Men's Open National Championships in Denver over the defending champion Marty Clark, ranked #48 in the world. In 1997, Mohsen retired from the pro circuit to coach full time and promote further growth of the sport in the West Coast.