Campbell Wilson has described his appointment as CEO and MD of Air India as a "great chance" to head a historic airline, but he has acknowledged that there would be "mountains to conquer" in his new role.
Mr Wilson is the Chief Executive Officer of Scoot Air, a wholly-owned subsidiary of Singapore Airlines.
Singapore Airlines (SIA) is a Tata Group joint venture partner in Vistara, a full-service carrier.
Campbell Wilson was appointed as the Managing Director and Chief Executive Officer of Air India by Tata Sons on Thursday.
"This afternoon I informed the management team and your union representatives of my resignation from Scoot and the SIA Group," he stated in a statement emailed to Scoot employees on Friday. He admitted that leaving was not an easy decision, given SIA was his first professional employment and his "home for the last 26 years."
Mr Wilson stated that Singapore Airlines has provided him with far more possibilities and experiences than he could have imagined across three continents, six countries, and more than 12 roles.
"It's especially difficult to leave Scoot, which I've had the honour and pleasure of developing from a mere idea in two chapters - together with a beautiful, wonderful group of individuals, past and present -
"It's very difficult for me to leave Scoot, which I've had the honour and pleasure of growing from a basic spreadsheet to, amongst many other things, the World's Best Long-Haul, Low-Cost Airline," he said.
"Scoot has genuinely been a labour of love from the beginning, through tremendous expansion, to the depths of aviation's worst-ever crisis, and now the accelerated recovery," he said.
"But there are other mountains to conquer," he said, "and I am humbled to have been chosen by Air India's board of directors as that airline's next CEO."
"It's a tremendous opportunity to lead a historic airline, now owned by the Tata Group, to new heights, and I'm glad to have the full support of the SIA management team to take on that exciting challenge," he said.
After winning the bid for Air India on October 8 of last year, the Tata Group seized control of the airline on January 27.