New Delhi, Nov. 17 -- Erstwhile billionaire and former promoter of Fortis Healthcare, Religare and Ranbaxy Laboratories, Shivinder Mohan Singh, has signalled a fresh comeback in the healthcare sector through a reflective and "open-ended invitation" shared on LinkedIn. The post-shaped more like an invitation than a formal job advert-emerges even as Singh deals with a challenging legal and financial phase, including a personal insolvency plea.

In the post, Singh writes that "the making of a great business has a prerequisite; a clear vision, unwavering purpose, systemic values and the right kind of people with a good work ethic."

He notes that he is preparing for "another innings in healthcare" with greater experience and a "deeper resolve...