Valentin O.
Project - Core Network + CEs Migration from MPLS -> SRv6 + SDWAN
Experience
Jan 2024 - Dec 2025
2 yearsHamburg, Germany
Project - Core Network + CEs Migration from MPLS -> SRv6 + SDWAN
Dataport AöR
- Design of a network management strategy focusing on network automation following NetDevOps principles and model-driven telemetry based on YANG data models
- Conducting workshops on setting up various customer services (L2VPN, L3VPN over SRv6) using NETCONF/YANG and real-time monitoring of network elements via model-driven telemetry
- Developing a role and permission concept for the consolidated operation of the networks
- Developing an end-to-end service measurement concept based on IPSLA and Telegraf-Prometheus-Grafana
- Creating and implementing an architecture concept for the dual-stack transformation of the management network
- Devices: Cisco NCS540
Jan 2022 - Dec 2023
2 yearsEllwangen, Germany
Project - Migration and Operation of an MPLS Network Infrastructure including Capacity and Problem Management
NetcomBW GmbH
- Configuring and operating MPLS components in Cisco and Nokia environments
- By automating migration tasks with Python and Ansible, including validation and rollback strategies, I achieved savings of over €300,000 in annual operating costs
- Proactive capacity management by identifying bandwidth bottlenecks through quantile-based analysis of network metrics and developing and implementing technical redesign recommendations to eliminate bottlenecks and optimize the network
- Project management in technical rollouts and network transformation projects — from planning to implementation
- Active participation in problem management by closely working with the engineering team to analyze and resolve complex network issues
- Devices: Nokia 7750, SAS-R6, IXR-R6, SAS-MXP, IXRe routers, Cisco 7600 routers, ISR 4000, Cisco switches 4500, 3560, 3850
Jan 2021 - Dec 2024
4 yearsWiesbaden, Germany
Project - Cisco SD-WAN Engineering and Operation
Hessian Center for Data Processing
- Engineering tasks in network architecture focused on extensions such as ZTP on-premises servers and CloudConnect solutions
- Configuration and operation of Cisco SD-WAN components (vManage, vEdge, vSmart, vBond)
- Developing operational concepts, including creating detailed operation manuals
- Administering and automating network processes using Python scripts
- Contributing to the introduction and continuous expansion of the SD-WAN solution, including integration into existing IT environments
- Devices: Cisco SD-WAN (Controllers, cEdge ISR4000, ASR1000, C8000 series), Cisco P, PE routers ASR9000 series
Jan 2020 - Dec 2022
3 yearsDarmstadt, Germany
Project - IP Core QoS and Metro Network Migration
Entega Medianet GmbH
- Developing and implementing an IP core QoS concept, including testing, implementation, and conducting training
- Migrating from Orckit to Huawei systems in the MPLS metro network, including planning, execution, and validation in live operation
- Operating, supporting, and troubleshooting customer connections as part of 2nd/3rd-level support
- Devices: Huawei NE20, NE8000, NE05, Juniper MX240, MX204, MX480, MX10003, Cisco ISR4000, 800 series
Jan 2020 - Dec 2020
1 yearProject - Cisco SD-WAN Network Deployment + Test Automation
- Setting up a Cisco SD-WAN network in a test environment
- Setting up a Linux platform for test automation with pyATS
Jan 2019 - Dec 2020
2 yearsStuttgart, Germany
Project - IP Core Network Optimization within the 2019 Connect fixed-line test
Unitymedia GmbH
- Network optimization in the backbone network focusing on latency, throughput, and routing performance for the 2019 Connect fixed-line test
- Capacity planning for central IP core nodes to support operational and strategic decisions
- Identification and analysis of design errors in the core network, e.g., in ACL design, CoPP strategies, and IGP redistribution
- Development of an IPv6 connectivity concept for servers including test deployment and successful acceptance in the live network
- Equipment: Juniper MX960, QFX5100, Alcatel 7750, A10 Thunder 6435
Jan 2015 - Dec 2019
5 yearsEschborn, Germany
IP Engineer on Vodafone BNG Modernization Project
Huawei Technologies Deutschland
- Acceptance and validation of various software versions according to technical and operational guidelines
- Development and acceptance of technical solutions for BNG platforms (Broadband Network Gateway) to deliver broadband services
- Creation of operational documentation for operations, support, and rollout
- Planning and conducting customer workshops for solution alignment, handover, and training
- Partial automation of test processes with Visual Basic
- Equipment: Huawei ME60 - X8 BNG, Cisco 1921 router, Nokia 7750, Easybox, Fritzbox
Jan 2014 - Dec 2015
2 yearsEschborn, Germany
Senior IP Engineer
Ericsson
- Acceptance and validation of various software versions according to technical and operational guidelines
- Extensive troubleshooting and fault resolution in the IP/MPLS metro and core area, including analysis of complex faults and sustainable problem solving
- Participation in the 24/7 on-call duty
- Equipment: Huawei NE40E - X3/X8, X16 routers, Cisco 7200/7600/10000/12000 routers, Nexus 5000 Series switch, Juniper ERX1440 BNG, MX routers, EX4200 switch, Nokia 7750 Service Router
Jan 2011 - Dec 2014
4 yearsBucharest, Romania
IP Engineer
Huawei
- Support of various IP projects at well-known telecommunications companies such as Telefónica O2 Germany – ME60 BRAS platforms, Deutsche Telekom – NGVI infrastructure, and Telenor TGS Norway – Next Generation Network (NGN)
- Verification, optimization, and implementation of technical solutions in complex WAN environments
- Commissioning of routers and switches in production-critical network areas
- Acceptance of different software versions according to technical and operational guidelines
- Equipment: Huawei CX600 - X8 metro switches, Huawei Eudemon X3, X8 firewall, Huawei NE40E - X3, X8 router, Huawei ME60 - X8, X16 BNG
Summary
As an experienced network specialist in the telecommunications industry, I plan and execute challenging network projects for carrier and enterprise environments. My focus is on integrating modern technologies, automating complex operational processes, and continuously optimizing networks – always aiming to build stable, scalable, and future-proof infrastructures. With deep technical expertise, high quality standards, and proven project management, I ensure successful outcomes – from architecture and implementation through operational handover.
Languages
Romanian
NativeGerman
AdvancedEnglish
AdvancedEducation
Oct 2010 - Jun 2012
Faculty of Electronics, Telecommunications and Information Technology - Politehnica University of Bucharest
Master of Engineering, Operation and Administration of Networks and Network Services · Operation and administration of networks and network services · Bucharest, Romania
Oct 2006 - Jun 2010
Faculty of Electronics, Telecommunications and Information Technology - Politehnica University of Bucharest
Bachelor of Engineering, Networks and Telecommunications Software · Networks and telecommunications software · Bucharest, Romania
Certifications & licenses
CCIE Routing & Switching #64718
Cisco
CCNA 1-4
Cisco
CCNP BSCI
Cisco
Juniper JIR
Juniper
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