Complex sentence: TEEP, in conjunction with Trans-Unity Pride, held its first job fair in 2008 and since then, TEEP has collaborated with the West Hollywood Chamber of Commerce on a yearly job fair.
Split into simpler sentences: TEEP, in collaboration with the organization Trans-Unity Pride, held its first job fair in 2008. Since then, with the West Hollywood Chamber of Commerce, TEEP has held a yearly job fair.