Firewall Engineer

The Network Security Firewall Engineer will configure, monitor and maintain network security equipment including, access control lists (ACLs), layer 3 and 4 firewalls, and layer 4-7 application-aware firewalls. Responsibilities: Skill in implementation of physical and virtual firewalls. Experience with Remedy trouble ticketing system. Manage firewall and network security systems by establishing and enforcing approved policies. Ability to research and verify ports, protocol and services (PPS) for security compliance. A thorough understanding of how applications communicate over the network using source and destination IP addresses, ports and protocols. Ability to analyze network security requirements and implement perimeter security changes. Serve as a subject matter expert in coordinating and troubleshooting with customers, other infrastructure support activities and business units. Develop network documentation of security infrastructure. Troubleshooting a variety of products within a multi-vendor environment. Monitor network performance and implement performance tuning as necessary. Utilize industry best practices for security, disaster recovery, business continuity, change control, the engineer will design, configure, manage and troubleshoot a variety of network firewall technologies. *This position is designed to be flexible, with responsibilities evolving to meet business needs and enable individual growth.

Requirements

Ability to obtain a Secret Clearance (preference goes to candidates who possess an Active Secret Clearance) 8+ years of Networking experience Knowledge or experience of Cisco ASA and Palo Alto Firewalls Experience in administrating and troubleshooting firewalls in medium to large, complex organizations. Preferred applicants will also have experience with intrusion detection systems, VPN technologies, vulnerability assessment tools, event and log analysis solutions, configuration and change management and other network security systems and devices. Solid experience configuring and troubleshooting routing and switched infrastructure. Experience with packet capture and analysis methodologies. Preferred applicants will also be familiar with government information assurance standards including DISA STIGs, NIST 800-53, IAVAs management, auditing and accreditation processes. Experience scripting with Python, Java, and or Perl. Why Work for Us? Core4ce is a team of innovators, self-starters, and critical thinkers—driven by a shared mission to strengthen national security and advance warfighting outcomes. We offer: 401(k) with 100% company match on the first 6% deferred, with immediate vesting Comprehensive medical, dental, and vision coverage—employee portion paid 100% by Core4ce Unlimited access to training and certifications, with no pre-set cap on eligible professional development Tuition assistance for job-related degrees and courses Paid parental leave, PTO that grows with tenure, and generous holiday schedules Got a big idea? At Core4ce, The Forge gives every employee the chance to propose bold innovations and help bring them to life with internal backing. Join us to build a career that matters—supported by a company that invests in you. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy), national origin, disability, veteran status, age, genetic information, or other legally protected status. Apply To This Job