Khalis graduated from the National University of Singapore in 1985 and was called to the Singapore bar in 1986.
Khalis was in private practice from 1986 to 2005. He dealt with property, trusts, estates, corporate, criminal, Muslim law, family and civil litigation. He was the first Chairman of the Law Society’s Muslim Law Practice Committee.
Khalis was an elected Member of Parliament from 2001 to 2006. He was Vice-Chairman of the GPC for Law and Home Affairs Ministries.
He was Director of an Islamic Finance Consultancy firm in 2005-2006. He currently holds a Certified Islamic Finance Executive certificate issued by Ethica Institute of Islamic Finance (Dubai).
Khalis was corporate counsel for Meinhardt (Singapore) Pte Ltd, an international engineering firm with a presence in 22 countries, for two years.
Khalis later became Legal Director of Mubadala CapitaLand Real Estate LLC (“Capitala”) based in Abu Dhabi. Capitala is a multi-billion dollar joint-venture between CapitaLand (Singapore) and Mubadala Development Company of Abu Dhabi.
Khalis joined SLP in 2011.