Network Engineer III

Simpson Thacher & Bartlett LLP; New York (NY); Hybrid; USD 175,000 - 210,000; Full time

Job summary

Simpson Thacher & Bartlett LLP in New York, NY is seeking a Senior Network Engineer to fortify the firm’s network and security posture. You will design, deploy, and maintain secure solutions across on-premises and cloud environments, manage firewall rules, and lead migration projects.

The ideal candidate has 7+ years of experience with Palo Alto networks, PAN-OS, Panorama, Cisco and Fortinet, plus Prisma Access VPN and SASE know-how.

Qualifications

• 7+ years of relevant experience in network security and engineering.
• Proficient with firewall management, rule optimization, and security zoning.
• Experience with enterprise platforms and cloud/on-premise deployments.

Responsibilities

• Create firewall rules and policy-based forwarding; manage site-to-site VPNs and SASE targets.
• Deploy Palo Alto SDWAN-IONs; design and maintain secure on-prem and cloud networks.
• Lead firewall migrations and upgrades; enforce regulatory compliance.
• Collaborate with IAM and Service Delivery; mentor junior engineers.
• Stay current on threats and firewall tech to improve defenses.

Skills

Palo Alto Networks

PAN-OS

Panorama

Cisco

Fortinet

Next-Gen firewalls

VPN

SASE

Education

Bachelor's degree in IT / Cybersecurity / CS

Tools

Prisma Access

Prisma Service Connections

Security monitoring tools

Job description

## Network Engineer IIIApply: Hybrid: New York, NY: Full time: Posted 3 Days Ago: R-2026-686The Senior network Engineer that will play a vital role in fortifying Simpson Thacher’s network and security, ensuring the protection of our infrastructure which aligns with our commitment to operational excellence and innovation. The role is critical for maintaining the safety and integrity of our IT infrastructure, ensuring seamless and secure operations across the company. The Senior Network Engineer will directly have an impact on the Firm's ability to safeguard its digital assets, maintain regulatory compliance, and ensure the continuous delivery of high-quality services to our clients and stakeholders.Essential Job Duties & Responsibilities* Deep-Expert level proficiency with leading enterprise platforms like Palo Alto networks, PAN OS, Panorama, Cisco and Fortinet as well as the Palo Alto Networks family of Next Gen firewalls, including but not limited to: + firewall rule creation + Configuring Policy based forwarding rules + Create site to site VPNs and SASE targets* Experienced with deploying Palo Alto SDWAN-IONs* Architect & Design, deploy, and maintain secure network solutions across on premises, and cloud environments.* Manage firewall rules and policies to ensure secure and efficient network traffic flow, perform rule base optimization and establish security zones to harden the enterprise* Conduct regular system audits to assess security risks and compliance with established protocols, ensuring that our network defenses remain impervious to external threats* Identify vulnerabilities within our network and recommend enhancements to our security posture* Collaborate closely with other IT teams, including the Identity and Access Management (IAM) and Service Delivery teams, to integrate firewall management with wider security and operational strategies* Ensure firewall configurations and policies maintain compliance with regulatory frameworks.* Provide technical support and guidance in network security issues to various departments, enhancing the overall security knowledge within the company* Stay up to date with emerging security threats and firewall technologies to continuously improve our security framework* Lead Firewall migration projects using vendor specific tools and oversee hardware/Software upgrades.* When needed provide technical guidance, training and troubleshooting support to junior network engineers and security engineers.* Perform other duties as neededEducationRequired* Bachelor's degree in information technology, Cybersecurity, Computer Science, or a related field, or equivalent professional experience in network securitySkills and ExperienceRequired* 7+ years of relevant experience* Proficient in network protocols, routing and switching concepts, and the ability to troubleshoot complex network security issues* Ability to perform with little to no guidance from management* Familiarity with various firewall management tools and security monitoring technologies.* Excellent analytical and problem-solving skills, with the ability to make quick, informed decisions* Extreme understanding with Palo Alto Networks Prisma Access VPN solution* Ability to configure Prisma service connections and Prisma HIP checks* Familiarity with SASE targetsPreferred* Legal IT experience a plus but not required**Salary Information**NY Only: The estimated base salary range for this position is $175,000 to $210,000 at the time of posting.The actual salary offered will depend on a variety of factors, including without limitation, the qualifications of the individual applicant for the position, years of relevant experience, level of education attained, certifications or other professional licenses held, and if applicable, the location in which the applicant lives and/or from which they will be performing the job. This role is exempt meaning it is not overtime pay eligible. **Simpson Thacher will not sponsor applicants for work visas for this position.**