In 2015, Marianne played in 16 LET tournaments and secured 7 top-15 finishes. Her best performances of the season were achieved at the ISPS Handa New Zealand Women’s Open and the Buick Championship were she finished T4 at both events. She finished the season in 12th position in the Order of Merit, winning €111,355.05.
In 2014, Marianne played in 17 LET tournaments and secured her best finish at the Italian Ladies Open where she finished T8.
In 2013, Marianne played 20 events and earned her third LET title at the South African Women’s Open, which was reduced to 18 holes due to adverse weather. Her next best finish was T6 at the Lalla Meryem Cup.
In 2012, played 19 events with a season best tie for 2nd at the Lalla Meryem Cup in Morocco. Season’s earnings: €56,127.79 (54).
In 2011, Marianne played in 13 events and finished T23 twice, at the RACV Ladies Masters and Finnair Masters.
In 2010, Marianne played in 7 events finishing runner-up twice; to Laura Davies at the Pegasus New Zealand Women’s Open and Sophie Gustafson at the AIB Ladies Irish Open. She finished 35th on the Henderson Money List with season earnings of €61,318.18.
In 2009, Marianne recorded two wins and seven additional top-10 finishes. She became a first time winner at the Deutsche Bank Ladies Swiss Open at Golf Gerre Losone, finishing one stroke clear of England’s Melissa Reid. She then earned a second victory at the Carta Si Ladies Italian Open at Golf Club Le Rovedine in Milan, rolling in a six foot birdie putt at the third play-off hole to deny Laura Davies. Marianne finished 4th on the Henderson Money List with season’s earnings of €203,350.38, which was her best result in five years on tour. At the end of the season, Marianne finished third at the LPGA Final Qualifying Tournament, where she earned Priority List Category 11 for the 2010 LPGA season.