Per Mar Security Services, which has offices in Griffith, Merrillville and Valparaiso, named a new CEO. The Davenport, Iowa-based company, which acquired Monument Electronics of Merrillville, Martin Security Systems in Valparaiso and Southlake Security in Griffith in recent years, promoted Brian Duffy from chief operating officer to president and CEO. He's the third generation of the Duffy family to lead the company founded by John and Eleanor Duffy in 1953. Outgoing CEO Michael Duffy now will serve as chairman of the board. âIâm very proud to have Brian be the third generation of t...