Manager of Network and Infrastructure Security

You will own the operational maturity of our network security function, leading a team of engineers to ensure robust monitoring, rapid incident response, and disciplined change management across a complex, high-throughput data center environment. Working alongside Network Engineering, Infrastructure, and the broader Security organization, you will align tooling, telemetry, and process to keep our environment secure, stable, and continuously improving.

Responsibilities

• Own the security posture and operational health of the firm's data center and HPC network infrastructure, ensuring resilient and secure connectivity across our facilities, cloud interconnects, and partner environments
• Lead and mentor a team of network and infrastructure security engineers, establishing clear accountability, KPIs, and development paths
• Develop and enforce operational standards for network security monitoring, alerting, and escalation, ensuring 24x7 coverage and rapid response capability
• Lead response coordination for network and infrastructure security incidents, driving containment, root cause analysis, and long-term remediation
• Align firewall, NAC, EDR, and SIEM telemetry to enable rapid detection and containment of threats across the data center environment
• Ensure secure handling of third-party, vendor, and out-of-band connectivity into our facilities, enforcing architectural and security standards at every boundary
• Embed change control discipline into all network and security modifications, with rigorous version control practices for automation code and configurations
• Develop and maintain documentation for network security architecture, automation solutions, configuration guides, and operational runbooks
• Drive automation across network security operations, reducing manual effort and improving consistency and response times at scale
• Ensure vendor solutions and integrations align with the firm's architectural and security standards

Requirements

• Bachelor’s Degree in an IT-related field or equivalent experience
• 7+ years of experience in network and infrastructure security, with 5+ years in a mid-level or senior engineering role
• Strong working knowledge of network security technologies including NG firewalls, VPNs, WAFs, IDS/IPS, NAC, ZTNA, proxies, and DNS
• Hands-on experience with SIEM, security orchestration and automation (SOAR), DLP, and network forensics tooling
• Familiarity with data center networking technologies including BGP, VxLAN, and high-throughput switching environments
• Experience with leading network and security vendors and platforms, including Palo Alto, Cisco, Arista, and Meraki
• Proficiency in network automation and scripting using Python, with strong version control practices using Git
• Solid understanding of Linux and experience operating in large-scale, Linux-heavy infrastructure environments
• Strong interpersonal and communication skills, with the ability to operate effectively across technical and non-technical stakeholders
• Demonstrated decision-making and problem-solving skills in fast-paced, high-availability environments

Nice to Have

• Experience with infrastructure inventory and network source-of-truth tooling such as NetBox
• Background in securing bare-metal or HPC-scale network environments
• Familiarity with out-of-band management networks and secure remote access in data center contexts
• Relevant certifications such as CCNP Security, PCNSE, CISSP, or equivalent