Krzysztof Nowak
Summary
Experienced Network Engineer with knack for solving complex network issues and improving infrastructure stability. Enhanced network performance through streamlined configurations and proactive maintenance, resulting in reduced downtime and increased user satisfaction. Skilled in implementing security measures that ensure data integrity and protect against breaches.
Overview
11
11
years of professional experience
6
6
years of post-secondary education
1
1
Certification
Work history
Network Engineer
Atos
Bydgoszcz, Poland
2020.08 - 2026.05
- Designed and implemented network solutions in multi-customer, multi-VRF environments
- Managed and executed network changes across firewalls, routing, IPsec VPNs, DNS, and traffic shaping
- Delivered firewall and network migration projects (Cisco ASA multi-context, Check Point)
- Configured and troubleshot BGP and OSPF routing protocols -
- Performed deep packet inspection and traffic analysis using tcpdump, fw monitor, and Wireshark
- Diagnosed complex network issues across VPN tunnels (site-to-site and remote access) and NAT policies
- Collaborated with network architects on network design, segmentation, and security architecture
- Supported infrastructure upgrades and hardware refresh initiatives
- Worked across multi-vendor environments: Cisco, Juniper Networks, Check Point
- Managed multiple projects simultaneously whilst maintaining high standards of workmanship.
Junior Network Engineer
Dimension Data
Prague, Czech Republic
2018.05 - 2020.06
- Providing remote technical support to clients.
- Remote support of on-site engineers and end users/customers during installation (Cisco Access points, switches and routers).
- Remote troubleshooting and fault finding in issues occur upon initial installation.
- Identifying root cause of incidents.
- Performing IOS upgrades for Cisco, Juniper devices (Routers, Switches, Standalone Access points, WLCs)
- Configuring Cisco, Juniper network Devices (Routers, Switches, Standalone Access points, WLCs).
- Ensuring resolution of incidents and service requests.
- Participating in performance reviews, identifying causes of performance shortcomings and provide suggestions for improvement.
- Reviewing the recurring or high impact incidents and managing them through problem management process.
Network Operations Center
Atos
Bydgoszcz, Poland
2017.03 - 2018.04
- Network Operator with German/English (NOC) is a part of Network, Data Center and Communication Services organization (NDCS). Team is a single point of contact for all network, security and communication issues for internal and external support teams. NOC is supporting worldwide infrastructure of more than 300 of Atos’ clients. Network Operator is providing daily operational support for our clients’ network, security and communication infrastructure.
- Daily responsibilities:
- Performing diagnosis on incidents
- Implementing standard changes to the environment
- Communicating with internal and external technical counterparts
- Management of system performance, capacity, service quality
1st Line Support with German
Atos
Bydgoszcz, Poland
2015.08 - 2017.02
- Troubleshooting various hardware, software, and network operating problems via phone, email, chat and remote control tools, involving technical resources to ensure resolution. Applying understanding and knowledge of information systems products and services to assist users.
- Identification, investigation, and research of user questions and problems as well as isolating and resolving information systems problems.
- Receiving and prioritizing issues and forwarding using appropriate escalation procedures.
Education
Applied Linguistics
Johannes Gutenberg University Mainz
Mainz, Germany 2012.01 - 2013.12
Bachelor's degree - Applied Linguistics
Uniwersytet Kazimierza Wielkiego
Bydgoszcz, Poland 2011.01 - 2014.12
Skills
- Networking
- Foreign Languages
- Cisco Routers/Switches
- Juniper Routers/Switches
- Checkpoint/ Cisco ASA firewalls
- WANs and LANs familiarity
- TCP and IP knowledge
- Technical documentation writing
- Network monitoring tools
- IP addressing and routing
- Networking equipment procurement
- Knowledge of juniper networks
- Networking concepts understanding
Languages
English
Fluent
German
Fluent
Polish
Native
Certification
- CCNA RS > Jun 2016
- Certified Meraki Network Operator > Aug 2018
- Cisco Certified Network Associate Wireless (CCNA-W) > Jan 2019
- CMNA > Mar 2019
- CCNP Enterprise > Aug 2022
- AWS Certified Cloud Practitioner > Nov 2022
- AWS Certified Developer - Associate > Feb 2025
- AWS Certified Solutions Architect - Associate > Nov 2025
- Juniper Networks Certified Internet Associate (JNCIA) > May 2026
Affiliations
- Electric guitar
Timeline
Network Engineer
Atos
2020.08 - 2026.05
Junior Network Engineer
Dimension Data
2018.05 - 2020.06
Network Operations Center
Atos
2017.03 - 2018.04
1st Line Support with German
Atos
2015.08 - 2017.02
Applied Linguistics
Johannes Gutenberg University Mainz
2012.01 - 2013.12
Bachelor's degree - Applied Linguistics
Uniwersytet Kazimierza Wielkiego
2011.01 - 2014.12