Mr Reeves will take up a role with leading accountancy firm Deloitte, beginning in January.
He said: “My eight years of working in Bradford have been stimulating, challenging and extremely enjoyable. Working for Bradford Council isn’t about individual people however, it’s about this great and very special place and all the people who live and work here.
“Councillors, staff at the council, and partner organisations across the public, private, voluntary and community sectors, will continue to make sure that the regeneration of, and investment in, our city and district continues at pace.
“The hard work and increasing confidence of businesses, local people and organisations in Bradford is shaping a shared, bright future, making our city and district a better place for everyone - now and for generations to come.”