Stefan Kreyssig

Developed private wireless, RAN, and core solutions for Tier 1 operators and industrial clients. Led tender responses, GTM execution, and ORAN integration for Deutsche Telekom. Delivered 5G solutions for BASF, BOSCH, Deutsche Bahn, and consulting for the German Police. Achieved 18% energy savings with AI/ML optimization and strengthened partner collaboration with Nokia, Ericsson, and Microsoft.

Managed presales for enterprise and Tier 1 operators, leading RFx responses, ORAN strategy, and partner collaboration with Microsoft, Dell, RedHat, and Airspan. Delivered Open RAN campus network design for a Tier 1 operator, managed 3 major RFPs, and enhanced customer satisfaction. Supported channel enablement, digital integration, and drove thought leadership via keynotes, webinars, and blog contributions.

Career break used for professional development, market research, and strengthening skills in strategic sales, partner collaboration, and digital transformation.

Led multi-BG solution sales across core, transport, and wireless, managing RFx cycles, stakeholder engagement, POCs, and partner collaborations. Delivered Indonesia’s first LTE-Advanced network ($100M project), generated $1.3M via Small Cells, and achieved $4M in annual software upsells. Boosted customer satisfaction through innovative architectural design and strategic cross-domain alignment.

Led a team of 10+ solution managers across ASEAN and South Korea, driving RAN solution sales for 2G/3G/LTE and supporting market entries in Vietnam and Bangladesh. Delivered 3000+ LTE sites in South Korea, 1000+ RAN sites in Myanmar, and the first U2100 deployment in Thailand. Boosted team performance and pipeline outcomes through strong leadership, strategic stakeholder engagement, and technical excellence.

Led RAN presales and marketing activities, driving tailored solution designs, proposal development, and stakeholder engagement. Delivered a competitor swap project in 2005, achieving 100% market share in Radio and Core. Boosted radio and microwave sales revenue by 50% and enhanced CSP brand visibility through targeted marketing campaigns and strategic upselling.

Led technical support and implementation for Radio Access and Packet Core networks across Southeast Asia, managing a 15-engineer team for upgrades, trials, and optimizations. Delivered seamless upgrades across Thailand’s networks, built strong CSP relationships, and supported proposal development and customer-specific solution designs, driving modernization and high customer retention.