Earlier in his career, Tuvok served on the U.S.S. Wyoming and was a teacher and cadet trainer at Starfleet Academy for 16 years before joining Janeway's crew on her ship prior to the U.S.S. Voyager; for a brief time he was on leave with a temporary assignment at Jupiter Station. In his youth, he was an opponent of the Federation-Klingon treaties but later came to see the wisdom of fellow Vulcan Spock's drive for alliance.
In his personal life, Tuvok is a devoted parent and husband — his wife was in labor for 96 hours with their third child — and engages his interest in the traditional Vulcan lute, playing it for his children when they could not fall asleep at bedtime. His youngest son was especially fond of "Falor's Journey," a 347-verse epic ode. Tuvok is also an expert botanist with growing orchids a specialty he continues in his own quarters, practices the Keethara meditation routine, and began his interest in the Vulcan game kal-toh with master studies at age 5. Prior to his stint on the Wyoming, he taught archery science at the Vulcan Institute for Defensive Arts, and has maintained a scholarly interest in the study of violence for over a century.
As a member of Voyager, Tuvok's physical, investigative and tactical skills are an inspiration to the crew, while his Vulcan equanimity and calm demeanor make him a valued peacekeeper aboard the ship. With his combination of wisdom, experience and vitality, Tuvok is one of the most respected members of the crew, even among the former Maquis.
From The Official Star Trek Website