Tennery began his career at Verizon Wireless. He spent his first four years there as Director of Sales in New York and Philadelphia before graduating to Vice President of National Distribution. In 2001 Tennery migrated to AT&T where he spent two and a half years as the Vice President of Sales and Marketing.
Tennery's next gig was at DotPhoto, a photo sharing platform where he acted as Vice President of Wireless. He spent the next two years as Vice President of Sales and Operations at Telos, a telecommunications company that was annexed with Sprint.
Jeff worked for 6 years as the Senior Vice President of AOL where he drove business and corporate development for their Mobile Advertising firm. In 2014 Tennery left AOL and became the founder and CEO of Moonlighting Marketplace. During that time he also became an Advisory Board Member at X-Mode, a location platform that focuses on innovation of map data.