Core Telecom prides itself on delivering excellence through an exclusive focus on inbound call services. We draw on extensive commercial experience gained from senior roles within a range of blue chip companies and each member of the team has a depth of understanding and expertise in inbound call management and non geographic number services. But ultimately, we believe that people do business with people, so we hope this section allows you to get to know us a little better.

Mahmood Mazhar

Chief Executive

Mahmood is a qualified accountant with over 20 years of business experience in the UK. He holds a Masters Degree in Business Administration and has a wealth of business acumen within the industries of leisure, retail and property; including a previous stake in an international food manufacturing business, being integral to its fortification. Since becoming involved with the telecoms industry his strategic focus and brand development has enhanced Core Telecom’s portfolio and profile.

Paul Turner

Managing Director

Paul is an accountant and has gained extensive senior experience with Compass Group, QMH and Hilton International, as well as developing businesses in the South Asian market over the last ten years. As one of the founding partners of Core, Paul is responsible for setting business parameters and commercial direction.

James Crowther

Sales Director

James started working in the telecoms industry in 1999, and has worked in many aspects of the industry from the distribution channel to reseller partnerships.

Working with the bleeding edge technology of hosted VoIP since 2007, he now heads up our Horizon team as a much more matured technology.


Michael Boyd

Sales Manager

Michael initially worked within the sales department and through a series of promotions  he now manages much our sales activity. Having joined in 2011, he has a wealth of telecoms knowledge and experience and is key member of our team.

Derek Branch

Head of Finance

Derek is one of the companies longest serving members having worked within our finance department for over 10 years. During this time he has also worked within practice developing trusted relationships with a range of private clients. His role at Core includes the preparation of the company’s accounts as well as the management of all out-payments to resellers and rebate customers.

Stuart Depelle

Head of Technology

Stuart is responsible for all our internal IT requirements, including our internal networking and tech support. He is also our portal expert who provides strategic advice as well as assistance to clients using our online portal.

Steven Raith

System Admin

Steven has over 15 years experience of systems support and administration, and has always tended to go for roles that he’d find interesting, as opposed to roles that would suit a traditional career path.

With experience ranging from pre-broadband ISP support, to being at the sharp end of large scale private and public IT installation/maintenance/administration, he has a unique view of systems administration centred around up-time, scalability and maintainability.