United Space Alliance was started as a cooperative venture between Lockheed and Boeing to handle all the launch preparation for the Space Shuttle. With the end of the Shuttle program, they have had massive layoffs, but still maintain a small presence supporting the International Space Station. If Boeing's CST-100 goes forward or life is breathed back into the Space Launch System (Ares V++), then USA has a chance to grow back. Barring that, I cannot imagine that it will continue operating much longer.