Gary O’Callaghan has been appointed division manager of power transmission and distribution (PTD) for Siemens. In his new role, he will assume responsibility as head of PTD in Ireland. PTD is a new division for Siemens and reflects a growing business and energy market for transmission and distribution products and solutions. O’Callaghan joined the company in 1992 as sales manager for enterprise communications and went on to run the business between 1998 and 2004. Following which, he then transferred to the energy and transport division where he spent the last three years as sales manager for PTD products.