Senior Juniper SRX Firewall Engineer

Symmetrio

4d•Remote

About The Position

Symmetrio is recruiting a Senior Firewall Engineer to join the network security team of a large government customer. The role supports a primarily Juniper SRX edge and core firewall infrastructure used for mission-critical applications and operations. This is a hands-on, day-to-day operations position focused on configuring firewall rules, building and troubleshooting VPNs, and diagnosing network issues. The engineer will work closely with the customer’s network engineers, security staff, and agency IT teams, owning issues from start to finish and communicating technical problems clearly to non-networking stakeholders. This is a remote, full-time W2 consultant role with Symmetrio. Candidates must be comfortable working EST hours. The position does not accept C2C or third-party candidates. The role also supports Palo Alto firewalls as the customer expands its use of that platform, with training provided as needed.

Requirements

At least 5 years of hands-on experience administering and troubleshooting Juniper SRX firewalls specifically on Junos OS.
Strong CLI skills, including building policies, zones, NAT, and VPNs from the command line rather than only through a GUI.
Proven IPsec/IKE/IKEv2 VPN troubleshooting experience.
Solid understanding of routing, switching, and enterprise network fundamentals.
Experience supporting large enterprise or multi-customer environments.
Ability to work independently, with strong written and verbal communication skills.
Willingness to complete a hands-on technical lab as part of the interview process.
Ability to pass a background check.

Nice To Haves

Experience with Palo Alto firewalls.
Experience with Juniper Security Director, Junos Space, or other centralized management platforms.
Experience with high-end SRX platforms, such as the SRX4000/5000 series, in edge or data center deployments.
Experience in government, municipal, or public safety environments.
Juniper certifications such as JNCIS-SEC, JNCIP-SEC, or higher.

Responsibilities

Administer, configure, and maintain Juniper SRX edge and core firewalls in a large multi-tenant enterprise environment.
Create, modify, and review firewall rules and security policies in response to agency and project requests.
Build, manage, and troubleshoot IPsec site-to-site and remote access VPNs using IKE/IKEv2.
Diagnose and resolve connectivity and traffic-flow issues using CLI tools, session and flow analysis, logs, and packet-level troubleshooting.
Perform planned changes, upgrades, and maintenance, with clear documentation and rollback plans.
Respond to escalated and critical incidents affecting network availability or security.
Work directly with agency IT teams and system owners to understand requirements and implement secure, supportable rules.
Coordinate with network engineering and cybersecurity teams to align policy, architecture, and incident response.
Schedule changes around the operational needs of public safety and other critical services, and communicate impacts to stakeholders in plain language.
Document configurations, standards, and procedures so knowledge is shared across the team.
Support Palo Alto firewalls as the customer expands its use of that platform.