IndiGo is India's largest domestic low-fare carrier, and is now that country's third largest airline in terms of passengers carried.
D A G Jayasuriya, Head of Engineering at Sri Lankan, said the airline has done several heavy maintenance checks for airlines such as Airblue and Emirates over the last several years.
"We have demonstrated time and again that we provide the highest level of expertise and a rapid time of completion at very competitive rates," he said.
"Our objective now is to secure continuous business from major airlines and smaller airlines that are expanding rapidly."
Manoj Gunawardena, Sri Lankan's chief executive, said Sri Lankan Engineering is now ready to carry out work for all airlines in the region.
"It is our intention to develop our maintenance, repair and overhaul (MRO) facility to be a centre of excellence."Sri Lankan Engineering in 2007 received the industry standard EASA 145 from the European Aviation Safety Agency, in recognition of its ability in aircraft maintenance.
The airline's school for pilots, aircraft engineers and technicians, Sri Lankan Technical Training, also became one of a few companies in Asia to receive the EASA 147 certification to provide training in aircraft maintenance to foreign and local students.
Sri Lankan has experience with Airbus aircraft, having an all-Airbus fleet of A320, A330, and A340 aircraft.
Indigo, which commenced operations in August 2006, now has 125 flights a day to 17 cities in India.
It has a fleet of 19, all of them twin-engined Airbus A320-200 aircraft, and has placed a six billion dollar order for 100 Airbus A320 and A321 aircraft which it expects to take delivery by 2016.