Nicollet turned professional in 2009 when she was 18 years old. She is the youngest Indian golfer to qualify for Ladies European Tour. She is the second Indian to earn a full card on the Ladies European Tour.
Nicollet won the 2009–2010 Order of Merit on the Women's Golf
Association of India and then five further events to finish on top of
the 2010– 2011 Order of Merit. She finished the top Indian golfer at
T22, at the 2011 Hero Honda Women's Indian Open, with the lowest score
of the day in the final round. She has a total of 11 wins on the Women's
Golf Association of India.
She finally qualified with a full
tour card for the Ladies European Tour in 2012, being the youngest
Indian golfer to qualify. Nicollet was the champion of the Hero-KGA
tournament in 2012 and the Hero-WPGT in 2015.