uh...it contracted all the previous NASA work too...from Mercury to Apollo to the shuttle!
For example:
The Mercury space capsule was produced by McDonnell Aircraft, and carried supplies of water, food and oxygen for about one day in a pressurized cabin.
The Apollo Command Service Module CSM was developed and built for NASA by North American Aviation starting in November 1961
The Apollo Lunar Excuson Module Lunar Excursion Module (LEM), was the lander portion of the Apollo spacecraft built for the US Apollo program by Grumman Aircraft to carry a crew of two from lunar orbit to the surface and back.
the Saturn V was designed under the direction of Wernher von Braun and Arthur Rudolph at the Marshall Space Flight Center in Huntsville, Alabama, with Boeing, North American Aviation, Douglas Aircraft Company, and IBM as the lead contractors.
The Space Shuttle Program was Commissioned by NASA and built by the joint effoerts of United Space Alliance, Thiokol/ Alliant Techsystems, Lockheed Martin, and Boeing Rockwell.