After completing the sophomore year at high school Berlin Frohnau, Miriam decided to continue training with her trainer Jonathan Yarwood at the Leadbetter Academy Bradenton (Florida). She attended Bradenton High School and got her diploma in 1999. Afterwards, she began studying "International Business and Management" at Arizona State University (ASU) where she had received a golf scholarship. At ASU she played for the Ladies Team Sun Devils. After a year however, Miriam was determined to follow her dream and become a playing professional. She moved back to Florida.She turned professional in february 2001 and played her first season as a professional on the furtures tour in america. She immedieately managed to achieve through constant play a conditional card of the LPGA season 2002. Despite that she concentrated on the future tour in 2002 and managed to achieve the third place in the money list in 2002. She thereby gained the right to play the LPGA Tour in 2003.

She finished her first full LPGA Season successfully with the 79th place in the order of merrit including a 10th place at the LPGA Williams Championship and an 11th place at the LPGA Shop Rite Classic. During the following winter Miriam trained hard with the fitness guru Kai Fusser, who also works with Annika Sorenstam.

Due to backproblems the season 2004 unfortunately did not run as well as expected. At the end of the season Miriam was 125th of the moneylist and had only a conditional card for the year 2005 on the LPGA. Therefor Miriam participated at the qualifying school for the Ladies European Tour in November and won the tournament. She therefore had for the first time also the full qualification for the European Tour.

2005 was up to now the most successful season for Miriam. She started at 24 tournaments. 7 of those were in Europe. In Tenerife Miriam scratched almost her first victory. At the end she finished with $ 89,905 price money at the 87th place on the moneylist and therefore had for 2006 the full qualification again for both - the LET and the LPGA tour.

2006 started with a personal highlight. Miriam participated along with Anja Monke at the world cup in south africa and made a terrific 9th place. Her best placing in 2006 was  the tournament right after the world cup in Hawaii where she was placed 6th.

Due to a skiing accident in December of 2006 she was forced to take most of 2007 season off and only participated in a few LPGA events towards the end of the year. She took a Medical Exemption in 2007 and returned to a full season in 2008.  In 2008 she did not play successfully on the LPGA and lost her  status.  

  In  the spring of 2009 Miriam played some mini Tour events on the Suncoast Series in Florida and found her motivation again. She also decided to spend some time back home in Europe. She played tournaments on the SAS Tour, a Feder Tour held in Sweden as well as a few tournaments on the European Tour.  In the fall Miriam  participated in both Qualifying schools as well as the Futures Tour Qualifying School. She made the cut at the LPGA Q-school and regained a conditional card for the European Tour. She also got her full status back for the Futures Tour. 

Miriam played the 2010 season entirely on the Futures Tour. She finished the year 42nd on the money list.  Her highlights were a 4th and 5th place finish at the Brownsville Open in Texas and at the Daytona Beach Invitational.  In 2011 Miriam is looking forward to play on the LPGA Futures Tour which starts at the end of March. 

As a preperation for her season, she has played two Suncoast Series events in the Orlando, Florida area. She was able to finish 5th in her first event with scores of 73, 68, 70 and  a 3rd place finish with scores of 72,70,72.