Get to know Telsis

Quality, availability and reliability.

Part of the Gamma Group, we are a highly focused centre of software engineering expertise in service management and cloud contact centre solutions.

We have experience and pedigree built over three decades, and more than 90 customers among tier 1, tier 2 telcos and MVNOs in 45 countries across three continents.

Telsis solutions are designed in Germany and the UK.

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Telsis carrier-grade solutions enrich communication, proactively manage fraud, secure revenues and transform network performance for carriers and systems integrators.

The Telsis mission is to enrich people’s lives through communications technology

Telsis provides network operators with flexible infrastructure and compelling telecoms services. From TDM, through IP-based networks to IMS and LTE, Telsis provides evolutionary solutions to match customers’ network developments and enable the provision of advanced services today.

SIP Trunk Call Manager

Telsis serves over 90 customers in 45 countries

Since 1987, Telsis has been partnering with major network operators around the world to help them drive value and achieve their business objectives. Our solutions deliver easy-to-use, engaging services to customers that drive revenues and create real competitive advantage.

Meet the team

Telsis Senior Leadership Team

Mike Mills

Director of Cloud and Infrastructure Partners

Mike has over 20 years’ experience within the telecoms, IT and mobile sectors and joined Gamma in 2007. Throughout that time he has held a variety of both sales and leadership roles across Gamma’s channel and wholesale business units. In his previous role, Mike was responsible for the transformation of Gamma’s carrier services business unit. Today he has overall sales responsibility for Telsis, as well as Gamma’s cloud and infrastructure partners. Mike is a graduate of the University of Northumbria’s Business School and has a degree in business systems and IT.

Peter Ritzmann

Managing Director

Peter joined Telsis in 1997 and is responsible for growth in Germany and the DACH region. Peter’s 20 year career in mobile and fixed-line telecommunications has provided him a deep understanding of SaaS market models, customer requirements, next gen-enabling software and the cloud-based business models.

Peter spent the early part of his career with ATIS systems and holds a master’s degree in Communications Engineering from Technische Universität Kaiserslautern.

Graham Moore

Product Delivery Director

Graham has over 25 years’ experience in the Telecoms, IT & Mobile sectors and as Telsis COO was fundamental in transitioning the company from a big-box network platform company into a software solutions vendor, which led to the acquisition of the company by Gamma in 2019.  Graham also helped establish Telsis’ channel based UCaaS provider, Telency which was built on top of Telsis’ software solutions.

Having worked with a wide range of customers, Graham understands how to balance both the service resilience needed by major fixed and mobile carriers with the agility needed to rapidly support end users with a diverse needs.

Graham is a Graduate of Manchester University and holds degrees in Science and Engineering.

Related products.

Case studies

Brands that rely on Telsis solutions.

Telsis provides solutions for some of the world’s tier 1 and 2 telcos and MVNOs in 45 countries.

Brands that trust Gamma.

Telsis has been our trusted partner and supplier for the past ten years, and we knew we could rely on their technical know-how to help us transition from traditional network technology to advanced communication systems that support SIP signalling protocols.

Frank Duderstadt
VP of Planning and Implementation, M-net

Job opportunities


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