Not THE "Orion" Project.

[Ray McCarthy]

Actually Europe is providing some of this, and will be using the modified ESA Space Truck as the Support Module for Orion.

Orion is only the capsule!
http://www.theregister.co.uk/2014/12/02/orion_test_flight_interview/

The original Orion
http://en.wikipedia.org/wiki/Project_Orion_(nuclear_propulsion)

The current Orion
http://en.wikipedia.org/wiki/Orion_(spacecraft)

ATV-based Service module
Orion spacecraft including the ATV derived Service Module with a propulsion stage attached at the back
In May 2011 the ESA director general announced a possible collaboration with NASA to work on a successor to the ATV. On June 21, 2012, Airbus Defence and Space announced that they had been awarded two separate studies, each worth €6.5 million, to evaluate the possibilities of using technology and experience gained from ATV and Columbus related work for future missions. The first looked into the possible construction of a service module which would be used in tandem with the Orion capsule. The second examined the possible production of a versatile multi purpose orbital vehicle.

On November 21, 2012, the ESA decided to develop an ATV derived service module for the Orion MPCV. The service module will likely be manufactured by Airbus Defence and Space in Bremen, Germany.

"ESA's contribution is going to be critical to the success of Orion's 2017 mission"
—NASA Orion Program manager

NASA announced on January 16, 2013 that the ESA service module will fly on Exploration Mission 1, the debut launch of the Space Launch System.

ESA, CNES and Arianespace doesn't get as much publicity as NASA, but is now the world leader in Commercial Space Technology. CNES is the French equivalent of NASA and does a lot of Science. Over 50% of launches and 61% of orbiting Satellites are by the European Space Center, which was commenced in 1960! Though in South America, most co-ordination and Control is from Darmstadt in Germany.

ESA Orion Service Module for Orion Capsule
http://en.wikipedia.org/wiki/Orion_Service_Module

So really as the future Launchers will not be NASA Rockets, NASA is hardly in the Space Vehicle arena at all. Only the capsule of Orion is a NASA project.