William Callaghan – Biography
Last update: January 25, 2026Executive profile
William Callaghan is currently
Vice President of United Security Services at United Service Companies - View - United Service Companies org chart
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The colleagues of William Callaghan
Company Colleagues
- At United Service Companies, William Callaghan has 20 colleagues including Richard Simon (CEO), Steve Novak (US Aviation Services)…
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- In the Business Services industry, William Callaghan has 25,813 colleagues in 1,217 companies located in 66 countries. 13,066 executive movements have been recorded in the last 12 months. Learn more about Business Services.
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