FacebookTwitterEmail Go Rio Cruises, the company in charge of barge tours of the San Antonio River Walk, is hiring for a list of positions this week.Josie Norris /Staff Photographer Go Rio Cruises, the company in charge of barge tours of the San Antonio River Walk, is hiring for a list of positions this week. Go Rio is hosting a job fair from Tuesday through Thursday at the Tower of the Americas from noon to 3 p.m. Open positions include tour guides and boat captains, which are considered a priority, according to details posted online. Other available jobs include roles in the facilities department, mechanics, sales managers and admissions.