Delbert has been a member of the congregation since 1998. At various times he has been a member of the Abbey Assembly, the Congregational Giving Committee, and Deanery Synod. Currently he is a member of the Cathedral Social Justice Group.

Professionally he has worked for a number of organisations in the public, private, and voluntary sectors – primarily in finance and planning. He has been a Trustee of USPG, an Anglican mission agency. Following retirement from full time work he chaired Hertfordshire Probation Trust; and Workplace Matters, an ecumenical partnership. He holds degrees in Economics from the London School of Economics, and Birkbeck College; and an MBA from City University.