In 2006, he launched the visual arts non-profit Organism, which has hosted the work of artists Jarrett Mitchell[9] Pipilotti Rist, Yoram Wolberger, Weppler & Mahovsky and Hank Willis Thomas.
One of Jahn's most memorable curatorial projects was a scholarly conference and exhibition[10] dedicated to the work of Donald Judd with Robert Storr as keynote speaker at the University of Oregon's Portland campus.
One Seattle critic, Jen Graves, described the work as, "a faux forest canopy made of jagged pieces of plywood that create a small, localized environment of green-tinted shadows where you can hide out to think.
As publisher and chief critic of PORT, he prompted Stuart Horodner to state, "In the ecology of Portland he is an important independent player....He's calling for a level of seriousness.
"[22] On December 20, 2006 Richard Speer stated, "Jeff Jahn has the smarts to mount quirky conceptual shows by nationally known artists…"[23] The Seattle Post-Intelligencer described "Fresh Trouble" (which included China's Cao Fei) as "impressive.