In 2005 and 2006, Grieve led the Burning Man Temple project, originated by artist David Best. In 2005, he designed and oversaw the construction of the festival's “Temple of Dreams. ” Then, in 2006, he led a team of volunteers to create the "Temple of Hope," named one of the best twelve art pieces at the festival.In 2007, Together with partner Ilana Spector, Grieve created "Bike Arch," aka "Bicycle Arch" aka "Bike Rack" a large scale piece using re-purposed bicycles as a medium. The archway was created from approximately 240 unusable junk bicycle parts headed for the dump from bicycle cooperatives. Soaring over the entrance to Burning Man's Center camp, "Bike Arch" was located in the central area in "Black Rock City" where bikes form the main mode of transportation. The artwork appeared in South Park Season 14, Episode 13, referencing Burning Man as well as the official 2012 London Olympic Opening Ceremonies program to illustrate the sport of cycling.