Biggi resigned as the city of Greeley's economic development manager on Dec. 31, a position he had held for seven years. Tom Gendren, chief executive of Woodward Inc. in Fort Collins, and auto dealer Scott Ehrlich in Greeley are heading up the effort to form the new economic development group that wants to establish one brand for Northern Colorado, mainly Larimer and Weld counties, and work with site selectors to attract new businesses to the region.