ACA Connects names Bill Tortoriello, ex-UScellular and AT&T, director-regulatory affairs … Aviatrix, cloud networking company, hires former Splunk CEO Doug Merritt as president-CEO, succeeding Steve Mullaney; Merritt also becomes board chairman … PCTel elects Ocolo’s Anthony Rossabi, also ex-Recovery Point Systems CEO, to its board ... Postmedia names lead director Peter Sharpe interim chair, replacing departed Executive Chair Jamie Irving ... Communications security platform Pavion promotes Alan Rosenkoff to chief marketing officer.