Leonard R. Gráf

Project Specialist Network Security & Telecommunications Team Lead @Robert Half

Munich, DE

Lead team of 6 (3 supervisors, 3 technicians) delivering network and telecom operations for Messe München under a 24/7/365 service agreement with 4-hour reaction time; deputize for the department head during high-pressure event operations.Operate at Messekoordinator scope: workforce planning and shift scheduling, custom-solution scoping and quoting for exhibitor requirements beyond standard portfolio, per-event billing reconciliation, and primary contact for VIP customers and Messe München project leads.Architect and deploy secure network infrastructure for flagship events including IAA Mobility visitors, 750 exhibitors from 37 countries, 3,700+ international journalists) and Expo Real participants, 1,780 exhibitors).Implement IAM controls and 802.1X authentication for WLAN and telecom access across 18 exhibition halls serving thousands of concurrent exhibitor connections.Design per-exhibitor VLAN segmentation on Extreme Networks infrastructure, enforcing Layer 2/3 isolation to prevent lateral movement across network segments.Detect and neutralize rogue access points using Netscout AirMagnet; perform RF spectrum analysis and channel optimization to prevent wireless interference.Own incident intake, escalation management, and SLA monitoring across the full delivery chain — from order management through on-site provisioning to billing reconciliation — with early detection of resource bottlenecks across personnel, materials, and subcontracted services.Maintain zero security incidents during high-profile events with VIP attendees including government officials and Fortune 500 executives.

Harvard Business School Online

Financial Accounting

MIT Sloan School of Management

MIT Sloan Executive Certificate in Management and Leadership