On 20 April 1979, Thomas became the first female skydiver for India, starting her career by completing her "A" license from the Skydiving Federation of India at Agra. She was just 24 years old, a mother of two children, and a civilian when she achieved this feat. A year later she completed 15 jumps which led to her joining the Skydiving Demonstration Team. Thomas did her first demonstration jump at Jabalpur for the Army Ordnance C, Celebration using a Para Commander for the first time.
1983: Thomas was part of the Demonstration Team for Federation Aeronautical International Annual Conference, hosted by the Aero Club of India. The jump was completed at Safderjung Airport, New Delhi. This led her to meet Claude Gillard, President of the
Australian Parachute Federation, a Delegate at the Conference, who invited her to attend the Australian National Parachuting Championship in Australia the following year.
1986: Thomas received a scholarship from the Hon. Prime Minister Rajiv Gandhi to attend the USA for further training. She completed over 150 Jumps at
Raeford, North Carolina. She also completed her first tandem jump and underwent the Basic Accelerated Freefall Course. She also trained as an Accuracy Jumper. ==World and national competitions==