Network Engineer
Data EdgeRomania19 days ago
Part-timeRemote FriendlyInformation Technology
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Contract Details: Freelance(6 months with high probability of further extension)
Hybrid work: 2 days from home, 3 days from the clients office from Bucharest.
Seniority: Mid-Senior Level
Language: Excellent English (spoken & written)
Role Overview
We are seeking a skilled Network Security Engineer to manage, maintain, and enhance our network security infrastructure. The ideal candidate will have solid hands-on experience with Cisco Firewalls (ASA & Firepower), strong networking fundamentals, and the ability to support a complex enterprise network. This role is critical in ensuring security, stability, and performance across all network layers.
Key Responsibilities
Firewall & Security Management
Education & Experience
Hybrid work: 2 days from home, 3 days from the clients office from Bucharest.
Seniority: Mid-Senior Level
Language: Excellent English (spoken & written)
Role Overview
We are seeking a skilled Network Security Engineer to manage, maintain, and enhance our network security infrastructure. The ideal candidate will have solid hands-on experience with Cisco Firewalls (ASA & Firepower), strong networking fundamentals, and the ability to support a complex enterprise network. This role is critical in ensuring security, stability, and performance across all network layers.
Key Responsibilities
Firewall & Security Management
- Manage Cisco ASA and Firepower firewalls, ensuring compliance with security policies and operational standards.
- Operate and maintain IDEMIA firewalls, centrally managed by the Network Security team.
- Create, modify, and remove filtering rules based on ticket requests, ensuring appropriate validation from Security and Compliance.
- Administer firewalls through FMC (Firepower Management Center), handling configuration updates, security hardening, and optimizations.
- Apply system configurations and enforce security hardening for new firewalls.
- Configure and manage routers, switches, firewalls, and load balancers to support stable network performance.
- Monitor network activity, detect anomalies, investigate incidents, and troubleshoot issues proactively.
- Oversee network performance using tools such as Wireshark, SolarWinds, Cisco IOS/NX-OS.
- Ensure robust and secure operations through best practices in TCP/IP, VLANs, VPNs, BGP, OSPF, and overall network security.
- Work closely with system engineers, project managers, and external vendors to integrate network components into larger infrastructure projects.
- Provide guidance and support to IT teams submitting firewall rule requests.
- Participate in infrastructure upgrades, migrations, and new deployments.
Education & Experience
- Bachelors degree in Computer Science, Software Engineering, or a related field (preferred).
- 3-5 years of hands-on experience in a similar networking/security role.
- Strong foundational knowledge of networking principles and enterprise-grade infrastructure.
- Experience managing complex network environments, ideally in infrastructure-heavy or construction-related industries.
- Mandatory: Practical experience managing Cisco ASA Firewalls (configuration, troubleshooting, policy management).
- Hands-on experience with Cisco Firepower, FMC, and firewall administration.
- Expertise in:
- TCP/IP
- VLANs
- VPNs
- BGP, OSPF
- Network security best practices
- Proficiency with troubleshooting & monitoring tools:
- Wireshark, SolarWinds, Cisco IOS/NX-OS
- Knowledge of cloud networking (AWS, Azure, GCP) and SD-WAN technologies is a strong plus.
- CCNA
- CCNP
- Or equivalent networking/security certifications.
- Strong problem-solving and analytical capabilities.
- Proactive mindset and ability to anticipate and resolve network issues.
- Excellent communication skills for interactions with both technical and non-technical stakeholders.
Key Skills
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