Standorval Thrall
From Star Trek : Freedom's Wiki
Lt. Standorval Thrall is a crusty Andorian who lost one arm in combat. He is known as a tougher instructor and reigns on Holodeck 8 at the Academy. He can be grumpy and demanding, but is known to be fair with high standards.
His students have included these notables: Jono Janeway, Lewis Nymes, Eric McDermott, Maraht the Horta, Agent Thom Hania, Henna-star and Brianna Frazier.
Academy Instructor Lt. Standorval Thrall is played by the creative writer/actor/role player known as Al Muir.