Dennis was a copywriter at Burch & Co. and KSV Communicators, working on print and outdoor campaigns. His main clients were Cellular One and Creative Sound. For two non-profits, the Earth Peace Film Festival in Vermont and the National MS Society Vermont Chapter, he created press releases, volunteer recruitment posters, and PSA radio spots for their events. He was a freelance writer for two years at the Champlain Business Journal, covering new businesses and features. He was also a monthly humor columnist for the New England Auto Dealers Monthly, telling quirky car tales. He has a state certified business called Words Worth Ink, under which he offers his copywriting services.
As an editor/writer for the New York City Board of Education, he wrote and edited seven in-house special education handbooks and activity guides, distributed to teaching staff in all five boroughs.
He has produced radio voiceover projects for Shadow productions, include spots for Noyle W. Johnson Insurance and the Champlain Fair.