South African production company Velocity Afrika has announced an alliance with S.A.'s Freshwater Films. Freshwater will join Velocity sibling Accelerator Films under the Velocity umbrella, but will continue to be marketed under the Freshwater name. ... Director Kathi Prosser, formerly of Piper Productions, has signed with Chelsea Pictures for U.S. commercials representation. ... San Francisco-based editor Peter Sorcher, formerly of Red Car, has signed with New York edit house wild(child) for east coast representation. The company has also added Spanish Flame artist Raul Ortego to its staff. ... Editor Jeff Grippe, formerly of The Grape Group, has joined Santa Monica edit house Swietlik.