By Sam Laskaris Writer The Six Nations Rivermen have some new men at the helm. It was officially announced on the weekend that Derek Graham, whose lengthy list of accomplishments include winning a National Lacrosse League (NLL) championship with the Buffalo Bandits, has been named as the head coach of the local Senior B team. And Six Nations member Jay Smith has been appointed as the general manager for the Rivermen. Smith joins the organization via the Six Nations Tomahawks. Last year Smith served as both the head coach and the GM of the Tomahawks, a Senior C club that captured the provincial Senior Series Lacrosse championship. The Rivermen compete in the six-team Ontario Series Lacrosse (OSL). The circuit also includes the Brooklin Merchants, Ennismore James Gang, Clearview Crushers, Owen…