A1 Group

A1 Group runs the kind of infrastructure that gets discussed in incident postmortems: fixed-line and mobile networks, broadband, data centers, and payment systems serving roughly 30 million customers across seven Central and Eastern European markets. Founded in 1998 as Telekom Austria AG and now part of América Móvil, the group operates in Austria, Belarus, Bulgaria, Croatia, North Macedonia, Serbia, and Slovenia. When a carrier at that scale fails, the failure is systemic - which is the point of the work.

The attack surface is broad and not optional to defend. Fixed-line networks, mobile networks, broadband internet, data centers, data and IT services, smart home solutions, payment solutions, and wholesale telecom services all sit inside the same perimeter, spanning consumer voice telephony and home entertainment through to business IT and wholesale offerings. The portfolio runs from Voice telephony and Broadband Internet to Mobile services, Home entertainment, Smart home solutions, Data and IT services, Wholesale offerings, Payment solutions, and a wider digital services lineup. Payments and smart home endpoints extend the problem past the network core into devices and financial flows the group doesn't fully control.

Scale: 16,000 employees, approximately 30 million customers, seven countries, in operation since 1998. The group describes its remit as system-critical infrastructure - connecting people and businesses through reliable infrastructure - and combines global expertise via América Móvil ownership with local presence in each market. That mix of multinational structure and national-market operations is the operating reality security work has to fit into.