Mark Butler possesses expertise in mobile devices, pre sales, telecommunications, integration, outsourcing and 6 more skills. Colleagues describe him as "I´ve worked with Mark when rolling out operator business in Central and Eastern Europe. His professionalism in customer projects was essential in driving operator billing to successful implementations. His empathy was crucial when dealing with customers." and "Mark is a natural solver of technical problems and one of the best engineers I have ever worked alongside. His ability to deliver effective solutions to deadline is second to none. I would gladly work with Mark again and have no hesitation in recommending him."