Eric Wilkinson worked for the Northern Colorado Water Conservancy District (Northern Water) as general manager until his retirement in October 2018. From 1984 to 1987, Wilkinson worked for the city of Greeley Water Department as a water resources engineer. From 1973 to 1984, he was employed by the Colorado Division of Water Resources, Office of the State Engineer in the Dam Safety Branch. In 1972, he served as the deputy water commissioner for the Cache la Poudre River.
Wilkinson served on many boards as both a representative and chairman, including:
- South Platte Basin representative on the Colorado Water Conservation Board.
- Chairman of the Colorado Water Conservation Board.
- South Platte Basin on the Interbasin Compact Committee (IBCC).
- Advisory boards and committees and on the board of directors of Colorado Water Congress.