Robertson served as assistant curate of St. Philip on-the-Hill, Unionville in 1997 and then at the Cathedral Church of St. James, Toronto from 1997 to 2000.
He held three incumbencies: St. Peter, Oshawa (2000-2005), St. Nicholas, Birch Cliff (2005-2011), and Christ Church Deer Park (2011-2016).
[4] He is responsible for 55 parishes in the York Scarborough section of the Diocese of Toronto.
In late December 2018, the Diocese of Toronto issued a congratulation to Bishop Kevin Robertson and Mr. Mohan Sharma, who were married at St. James Cathedral.
[6] The report stated that:"Bishop Kevin and Mohan, who have been a couple since 2009, had their relationship blessed in 2016 according to the Pastoral Guidelines of the Diocese of Toronto and are now married under the marriage provision of the same guidelines."