Tok'ra Technicians are members of their species who were primarily responsible for the creation as well as destruction of the underground crystal tunnels employed by their race. They were also charged with keeping their people equipped.
In addition to these duties, the Tok'ra technicians were responsible for evaluating alien technology that would be used to aid in their struggle against the Goa'uld. (RPG: "Friends and Foes: Stargate Season Two")