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Network & Security Projects

Selected transformations plus a detailed project inventory & RFP track record.

Selected Transformations

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Data-Centre Campus with Cisco ACI

Mission-critical SDN workload

Migration from multilayer core to Cisco ACI fabric incl. NGFW, micro-segmentation and compliance with minimal disruption.

Cisco ACISDNNGFWMicro-segmentation
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Teams Voice – >20 PBXs → 1 Platform

Microsoft Teams Phone roll-up

Consolidated >20 PBXs across EMEA & APAC to Teams Phone (>1 000 users), achieving ~-25 % voice OPEX with zero downtime.

Teams PhoneDirect RoutingSIP GWLegacy PBX
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Global SD-WAN for 30+ Countries

Local sites performance boost

Designed and led a cost-efficient SD-WAN with local breakout, improving app performance while reducing carrier spend (double-digit %).

SD-WANZero TrustLocal breakout

Pivotal Projects: Detailed Inventory

Project Inventory (selected)

  • Worldwide Data Centre Network Transition (details under NDA).
  • NGFW manufacturer transition to enhance global security.
  • Kubernetes cluster deployment & integration.
  • Azure cloud network extension across regions.
  • Firewall virtualization (NGFW → virtual appliances).
  • Data centre network relocation with no production impact.
  • SSL VPN architecture rollout for global remote work.
  • MS Teams Voice transition (legacy PABX replacement).
  • Cisco DC shift to SDN incl. NGFW integration.
  • MPLS → SD-WAN migration with internet/firewall redesign.
  • Local DC network build-out in Asia, integrated to corporate DC.
  • Global VPN network (>200 locations).
  • Relocation of Asia DC services and links to Europe.
  • Modern network infrastructure rollout (MPLS, LAN).
  • New DC network installs with internet & tiered firewall design.
  • Global Siemens PABX & VoIP integration.
  • Cisco Call Manager for financial HQs.
  • Bank group DC & backbone development (CEE).
  • UMTS packet core operations (Hutchison 3G Austria).
  • Continuous tech enhancements and compliance.

RFP Management & Execution

  • 2018: SDN DC campus (routers/switches + NGFW).
  • 2017: L2/L3 switch rollout (>200 units).
  • 2012: International MPLS network (>30 countries).
  • 2008: IP telephony migration in CEE (>1 000 phones).
  • 2007: New DC campus (routers/switches/firewalls).
  • 2007: Central high-speed European WAN.
  • 2006: Decentralized LAN switches for savings banks (2 500 units).
  • Pre-2005: Multiple carrier-grade solutions.

Contact

Email
office@wiedenhofer.co.at
Phone
+43 664 847 9106
Address
1220 Vienna, Schiffmühlenstraße 53/3