Peter Arbitter has been working in the ICT industry since 1991. First as a freelancer, then as CFO of a medium-sized service company.

This was followed by twelve years with Siemens AG in various management positions: Strategy for the COM business unit, telco sales for the IT unit, data center operation for the outsourcing unit and finally CTO for the IT unit. 

In 2009, he joined T-Systems GmbH as the VP IT and Cloud portfolio.

In 2011, he moved to Microsoft Deutschland GmbH to run the technical support for corporate customers division in the DACH region. After two years, he was responsible for the "Cloud & Enterprise" business group.

In 2016, Peter Arbitter re-joined Deutsche Telekom to lead the product devision of the B2B business. Additionally he took over the Tribe for "Enterprise Networks" and the business unit “SDx” – both multi billion virtual end-to-end organizations with several thousand employees. In 2023 he started building the cross group business unit Magenta APIs.

In March 2025 Peter Arbitter joined Aduna, a Joint Venture of Ericsson and 11 leading global Telcos as the Chief Commercial Officer.