11x MAC Tournament Champions (1982, 1983, 1984, 1986, 1997, 1999, 2000, 2001, 2002, 2013) MAC East Division Champions (1984) 10× MAC Coach of the Year (1983, 1984, 1986, 1987, 1991, 1994, 1996, 1997, 2002, 2017) NFCA Coach of the Year (1987) NCAA Mideast Region Coach of the Year (1987) 2× NFCA Great Lakes Regional Coach of the Year (1994, 2000) Grand Valley State Hall of Fame (1989) Michigan Amateur Softball Hall of Fame (2000) West Ottawa High School Hall of Fame (2001) Margo F. Jonker is an American softball coach and the current head coach of the Central Michigan Chippewas.

She was a 2003 inductee in the National Fastpitch Coaches Association Hall of Fame.

During her 31 years as head coach, the Chippewas have gone to the NCAA tournament 13 times and have 11 Mid-American Conference (MAC) titles.

At the 2000 Olympics she served as an assistant coach on the United States Olympic softball team that captured the gold medal in Sydney, Australia.

[2] She is a Holland, Michigan native and attended and played softball for the Grand Valley State Lakers.