Contact Us

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Andrew F. Salyers
GIS Manager/President
126 South Main St.
Mount Vernon, OH 43050
(740) 485-0340
salyers@gislandmark.com
Ray Summerfield
GIS/GPS Project Manager
(740) 507-6657
summerfield@gislandmark.com
Jason Ewalt
GIS Project Manager
(740) 507-5227
ewalt@gislandmark.com
Matt Duston
GIS Project Manager/International
(740) 334-5439
duston@gislandmark.com