William Halliday is a seasoned security professional currently serving as the Senior Director of Security Consulting at RosettiStarr since January 2023. Prior to this role, William held the position of Director of Global Security at Marsh & McLennan Companies for nearly two decades, from April 2003 to April 2022. With extensive experience in the security sector, William Halliday has demonstrated expertise in managing comprehensive security strategies and initiatives.
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