Daniel Tiefnig


As co-founder of Sipwise, Daniel managed growth of the company from its beginnings as a high-tech startup to a leading Open Source telco vendor. With his engineering mind and longtime industry experience, he is now opening up new frontiers with Sipwise as part of the ALE group. Daniel has been working as an Open Source advocate in the ICT industry since early 2000, engineering some of the biggest ISP systems in Austria and abroad.

Gernot Fuchs


Gernot started his career in the IT industry in 1995, working as a consultant and project manager for software development and system architecture in Austria and the US. Before joining Sipwise in 2012, Gernot served as  Director Engineering & B2B Operations at UPC, Austria’s largest cable operator, and held various executive positions with UPC’s subsidiaries in Austria and Europe.

Susanne Windisch

Head of HR and Administration

From Recruiting and onboarding to talent management and International Employment law Susanne shapes the working environment for employees at Sipwise since 2012. Through her training and many years of experience working in the HR and management sector, she has gained extensive knowledge in the domain. Susanne has been part of the Sipwise board of Directors team since 2020.

Oliver Schlögl

VP Marketing & Sales

Oliver is working in the field of IT & Telcommunications since 1999 and is responsible for sales and marketing at Sipwise. The industry expert has been working for the company since 2013 and has gained extensive technical and management knowledge during his many years of work in the ICT field. Before he joined Sipwise he was Head of Partner Management B2B at UPC (known as T-Mobile/Magenta Telekom) and responsible for the indirect sales channel in Austria.

Alex Lutay

VP Development

Enhancing the Sipwise team as Head of Quality Assurance in 2013, Alex is now in charge of the entire development area. As an accomplished NGCP and Softswitch expert, he is responsible for ensuring consistent performance and quality of the Sipwise Unified Communication solutions. Before joining Sipwise, he gained distinctive knowledge of the telecommunications industry, heading his own department at PortaOne. Alex has been part of the Sipwise executive board since 2020.