Complex sentence: One of these positions belonged to senior vice president of alternative programming Kristin Connolly Vadas, one of two alternative programming executives at The CW, who was in charge of the network's unscripted projects since 2008.
Split into simpler sentences: One of these positions belonged to SVP alternative programming Kristin Connolly Vadas. Vadas was one of two alternative programming executives at The CW, in charge of the network's unscripted projects since 2008.