Office of Administration ITSD » Directory Office of Administration ITSD » Directory Go back to directory. Add to Address Book. Office of Administration ITSD Office of Administration ITSDDepartment of Economic Development Contact: Colin Duewell, GIS Specialist Work 301 W. High St. Rm. 580 Jefferson City MO 65102 work Work Phone: 573-522-8465work Work Email: colin.duewell@oa.mo.govINTERNET Categories: State Updated 3 years ago.