Security Engineer - Networking

About the Role 

Shamrock is seeking a Network Security Engineer to join our Cyber Security team and help protect the organization's network infrastructure through the administration and support of enterprise firewall technologies and network security controls.  

This role is ideal for a security professional with 3+ years of experience who enjoys hands-on technical work and wants to continue growing within cybersecurity. The Network Security Engineer will focus on firewall operations, network segmentation, access control management, threat detection, and security incident support while partnering closely with Infrastructure, Networking, and Security teams.  

The ideal candidate possesses a strong foundation in networking and cybersecurity, experience supporting enterprise firewall platforms, and a passion for protecting systems and data from evolving cyber threats.  

What You’ll Do 

• Configure, manage, and maintain enterprise firewall environments to ensure secure and reliable network operations.  

• Implement, modify, and troubleshoot firewall policies and access control rules based on business and security requirements.  

• Monitor network traffic and security alerts to identify potential threats, vulnerabilities, and suspicious activity.  

• Support VPN technologies, secure remote access solutions, and network segmentation initiatives.  

• Investigate and resolve firewall-related connectivity and security issues.  

• Participate in the deployment, maintenance, patching, and lifecycle management of firewall and network security devices.  

• Conduct periodic firewall rule reviews and assist with access recertification efforts.  

• Partner with Security Operations, Infrastructure, and Network teams to strengthen security controls and improve threat visibility.  

• Assist with network-based security investigations and incident response activities.  

• Support vulnerability remediation efforts related to network infrastructure and security devices.  

• Maintain accurate documentation of firewall configurations, network diagrams, and security procedures.  

• Help ensure compliance with organizational security standards, policies, and industry best practices.  

• Stay informed on emerging cyber threats, attack techniques, and network security technologies.  

What You’ll Bring 

• 3+ years of experience in network security, cybersecurity, network engineering, or a related technical discipline.  

• Hands-on experience administering or supporting enterprise firewall platforms.  

• Experience implementing and troubleshooting firewall policies and security rule changes.  

• Familiarity with security monitoring, log analysis, and threat detection concepts.  

• Understanding of cybersecurity principles including vulnerability management, incident response, and defense-in-depth strategies.  

• Strong analytical, troubleshooting, and problem-solving skills.  

• Effective written and verbal communication skills.  

What Will Set You Apart 

• Experience supporting Palo Alto Networks firewalls.  

• Exposure to security monitoring and SIEM platforms such as:   

• Microsoft Sentinel  

• Splunk  

• Rapid7  

• CrowdStrike  

• Knowledge of Zero Trust architecture and network segmentation best practices.  

• Experience working within a Security Operations Center (SOC) or Cyber Security team.  

• Industry certifications such as:   

• CompTIA Security+  

• CompTIA Network+  

• Palo Alto PCNSA  

• Cisco CCNA  

• Fortinet FCP/NSE