With more than 15 years of IT, Telco and development experience, using multiple technlogies and administrating various services, I have built excelent knowledge base in data processing, *nix administration, IP services managment and open source development. Ex. ISP Chief Systems and Network Administrator with 10y experience in core ISP concepts, VoIP and Billing developer with deep understending of mediation and fulfilment processes. Experience in sales and business processes.