She is the current national record holder in the marathon, a distinction she achieved by clocking 2:34:43 at the 2015 World Championships in Beijing.

[11] At the 2014 Asian Games held in Incheon, South Korea, Jaisha won the 1500 metres bronze with a time of 4:13.46.

[4][14] At the National Games, held early February in the year in Jaisha's home state of Kerala, the marathon runner easily beat out the rest of her competition and won the gold medal in the 5000m event.

[15] In August 2015, Jaisha participated in the marathon at the World Championships in Beijing, where she finished 18th, one place ahead of compatriot Sudha Singh, among the 52 athletes who completed the race.

Both Jaisha and Singh improved upon the former's national record time set earlier in the year at the Mumbai Marathon, and both also qualified for the 2016 Olympics by virtue of their showing.