Mercer's Sustainable Investment team, until recently the Responsible Investment team, provides consultancy advice to asset owner clients with assets under management in excess of $15 trillion.

Mercer has recently expanded its Sustainable Investment team to 25 dedicated specialists to emphasise its commitment to its environmental, social and governance (ESG) investing and provide its clients with more expertise from all over the globe in a constantly changing regulatory environment.

"With sustainable investment being a part of our investment consulting credentials we understand how sustainable investment advice fits into a client's investment process, how that sits alongside all the other investment decisions that our clients are facing," said Jillian Reid, principal of sustainable investment at Mercer. "That is the big picture that forms the sustainable investment journey we are able to take clients on and integrate ESG into their processes."

Mercer's global manager research team also evaluates more than 4,400 investment manager strategies on the extent to which they integrate ESG factors, and active ownership (voting and engagement) on a scale of ESG1 (the highest rating) down to ESG4 (the lowest rating).