PLATTSBURGH — He covered the 23rd District contest last year, when Doheny lost in a close race to Owens. He also covered the special election in 2009, when Owens triumphed narrowly over Conservative Party candidate Douglas Hoffman of Lake Placid.
"(Deputy) is a position that not only gets me in the room where strategy is discussed but entitles me to a fairly big say," Seymour said in a news release.
"I'm quite opinionated about what I believe works — and doesn't work — in campaigns here in the North Country.
"I am excited about the chance to bounce my ideas off some of the brilliant minds that will undoubtedly join us as the campaign ramps up."
Doheny, a native of Alexandria Bay, sought the Republican nomination for the 2009 special election that was created when longtime Republican Congressman John McHugh was named secretary of the army by President Barack Obama.
Doheny was one of nine candidates seeking the GOP nod but lost out to Dierdre "Dede" Scozzafava, a St. Lawrence County assemblywoman.
Republican Party leaders were heavily criticized by party members for their choice of Scozzafava, who was seen as too liberal.
She pulled out three days before Election Day as her poll numbers lagged. She threw her support to Owens, further upsetting party faithful.
Doheny, a former New York City investor, won the right to challenge Owens last year when he beat Hoffman in a primary.
Hoffman effectively stopped campaigning after the primary and pledged to support Doheny, but his name remained on the ballot as the Conservative Party candidate, and Hoffman received about 6 percent of the vote.
Many believed that doomed Doheny's chances.
Doheny has kept a low profile since last November, but he has been seen at various functions around the district, indicating that he still had interest in running.