About citilan — Enterprise experience for the Mittelstand
Behind citilan stands Frank Arndt: a graduate engineer in electrical engineering and, for more than 20 years, a transformation manager for enterprise networks and IT security — with career stations at the industry’s giants: Nokia, Nokia Siemens Networks and Hewlett Packard.
That is where the expertise took shape that moves the Mittelstand forward today: complex transformations at international scale. A global SASE/SD-WAN transformation for a Tier-1 automotive supplier — SASE before the term even existed. Europe-wide platform solutions for service providers. Sovereign, highly available infrastructure for the public sector. Always with measurable results — from 60% cost reduction to 40% fewer outages.
Since 2021, Frank Arndt has been bringing this experience to where it makes the greatest difference: the German Mittelstand. citilan plans, builds, operates and secures IT — SASE and Zero Trust, SD-WAN, network design, cloud and digital sovereignty. No buzzword bingo, no call-center chain: you talk directly to the person who builds it.
At home internationally. What works for corporations across borders will carry your cross-border business too — whether DACH, Europe or worldwide.
Collaborative. Dependable. As equals.
Business Innovator 2026
Awarded by the German Institute for Innovation and Sustainability (diind)
Our Strengths
Hands-on Experience
Hands-on experience from numerous successful projects
Technology Expertise
Broad know-how across modern IT systems and architectures
Vendor Independent
Independent consulting with no product lock-in
Fast Delivery
Agile methods for rapid time-to-value