Network Administrator

Erfahrener Netzwerkexperte mit Fachkenntnissen in SDWAN-Technologien sowie Cisco- und Fortinet-Lösungen. Kompetent in der Bereitstellung von Support, Fehlerbehebung und der Entwicklung kundenspezifischer Lösungen. Bewandert in BGP, OSPF, VPN und anderen Netzwerkprotokollen. Ausgeprägte Kooperations- und Kommunikationsfähigkeiten mit Erfahrung in der Schulung und Betreuung von Kollegen. Zertifizierungen in CCNA Routing & Switching und MTCNA. Zweifacher Bildungshintergrund mit Schwerpunkt auf Netzwerken. Spricht fließend Slowakisch, Tschechisch und Englisch. Genießt Outdoor-Aktivitäten und spielt Gitarre.

Network Consultant

(2022 September – current job)

• Mainly responsible for custom, non-standard solutions and migrations.
• Providing L4 support for SDWAN.
• Responsible for RCA, permanent and temporary fixes, adjusting the solution to resolve issues,documenting issues and solutions.
• Responsible for reporting design issues, proposing workarounds and modifications of design.
• Requesting and designing new features, including enhancements, risk mitigation and newfunctionalities.
• Responsible for research and initial test phase of new functionalities, workarounds, or customsolutions.
• Providing support to L2 and L3 teams during complex migrations, including support in planningphase.
• Providing consultations to customers, L2 and L3 teams, platform architecture and pre-salesarchitecture teams.
• Collaboration with network architecture and pre-sales architecture teams on creating newfeatures.
• Conducting SDWAN training sessions for L2 and L3 teams.
• Working with same technologies as described below.

Network Engineer

(2020 September – 2022 August)

• Worked with Cisco Viptela (vEdge 100b, 1000, 2000, ASR1001X/HX, ISR4331, C8300-1N1S/2N2S, C1111, C1161, C1109LTE, ISR11004G/6G (Viptela and IOS XE software), vEdge Cloud, CSRV1k, C8000V and ENCS) and Fortinet (VM64KVM, 60E, 100F) SDWAN technologies.
  • Worked with Cisco CSO/NSO, ESC, OpenStack, PNP.
  • Worked with C9300L, Nexus 9000 and ASR9K.
  • Deep knowledge of Cisco Viptela and Fortinet SDWAN solutions (eg. traffic engineering using PBR,QoS, AAR, SLA, health-checks, On-demand/ADVPN tunnels, ZTP, OMP).
  • Worked with AWS, Zscaler and Umbrella SIG.
  • Worked with BGP, OSPF, VRRP, VPN, NAT, BFD, Syslog, Cflow, ZBFW, UTD.
  • Providing L3 support for SDWAN and orchestration (including RCA and quick workarounds forcustomers).
  • Part of FP team where closely worked with NSO developers.
  • Functional, integration, regression and sanity testing of network features developed by FP team.
  • Responsible for troubleshooting FP and design related issues.
  • Providing RCA, solutions and/or workarounds for FP and design related issues.
  • R/B migrations in pre-production and production environments (including troubleshooting,recovering VNFs, restoring devices and providing RCA).
  • Executing customer’s specific migrations (including applying necessary manual configuration into their solution to support the migration and proposing/designing best migration approach for the customers).
• Providing consultations to customers, pre-sale engineering team, platform architecture team, FP team, and product management team.
• Experience with Jinja templates.
• Responsible for LLD of Fortinet SDWAN solution (ADVPN, IKE, IPSEC, BGP, SDWAN, health-checks,services, neighbors, AAR and QoS), including design, testing, implementation, and documentation.
• Worked closely with Cisco TAC engineers and Fortinet architects.
• Worked closely with Cisco’s lead software engineers and architects as Cisco Red Badge to deliverproducts to Ngena.
• Providing internal trainings to OPS and orchestration support teams.
• Worked with waterfall and agile approaches.
• Providing technical expertise at job interviews.
• Assessing and mentoring new colleagues.

Network Engineer in FCI Connectivity team

(2020 April - 2020 August)

- New project, mostly operation tasks.

• Incident and change management.
• Worked with Cisco ACI, NSO, OpenStack, Nexus 9000 and CSR1000V.
• Cooperation with architecture and software engineering teams.
• Worked with agile approach.

Network Administrator in WSA team

(2018 - 2020)

- Responsible for complex solutions, migrations, and maintenance activities.

• L2/L3 support, deep analysis and troubleshooting activities.
• Providing RCA and documentation.
• Consultations with customers and other stakeholders.
• Responsible for complex upgrade of WAN routers/switches where zero outage was mandatory.
• Worked with Cisco (Catalyst, ASR, Nexus), Brocade (VDX, MLX) and Huawei (NE9000).
• Worked with MP-BGP, OSPF, EIGRP, ISIS, MPLS, VPLS, HSRP, VRRP, VLAN, VRF, VPC, VDC, VSS, STP.
• Worked with SM9, HPNA, Wireshark.
• Worked on Linux bash scripts to provide automated pre/post-check.
• Connections to Internet, MPLS and 3rd party service providers.
• Incident, problem and change management.
• Attending safeguarding and CAB calls.
• Pro-active checks to mitigate potential risks.
• Created operation manual for newcomers.
• Trainer at DCNO network farm (November 2019 – December 2019).

Network administrator in DCLAN Implementation, DCLAN RUN and WSA team (part-time)

(2015 - 2018)

• Mostly responsible for new build-ups, decommissions and various troubleshooting activities.
• L2 support, troubleshooting calls with customers.
• Attending calls with customers to clarify solutions.
• Worked with MP-BGP, OSPF, EIGRP, ISIS, MPLS, VPLS, HSRP, VRRP, VLAN, VRF, VPC, VDC, VSS, STP.
• Worked with Cisco (Catalyst, ASR, Nexus) and Brocade (VDX, MLX).
• WAN and LAN datacentre connections.
• Improving system management, capability management and monitoring.
• Incident, problem and change management