Network Security Engineer

About the role

NorthMark Compute & Cloud (NMC²) is backed by dedicated leadership and investment, operating at the bleeding edge of technology. Its goal is to scale and enhance high‑performance computing (HPC) and cloud infrastructure that supports clients' research, production, and delivery, enabling breakthroughs that shape the industries of tomorrow. Engineers build critical infrastructure to eliminate friction in scientific research, simulations, analysis, and decision‑making, accelerating discovery and driving faster innovation.

As a Senior Network Security Engineer, you will manage, implement, and optimise a hyperscale network security infrastructure. You will serve as a technical leader overseeing complex security architecture initiatives, mentoring peer engineers, handling escalated incident response efforts, and ensuring compliance with the latest security standards. The role emphasizes automation, requiring a strong background in and interest in leveraging automation technologies.

Responsibilities

• Mentor junior and mid‑level engineers, oversee team activities, and provide guidance in complex troubleshooting and architecture decisions.
• Implement and manage advanced security solutions using firewalls, proxies, system hardening, threat profiling, and segmentation strategies to protect intellectual data.
• Act as the lead escalation point for critical security incidents.
• Develop automation playbooks, network security policy frameworks, and consolidation models; drive root‑cause analysis with corrective actions.
• Oversee network vulnerability assessments, coordinate penetration testing, and plan remediation.
• Champion integration of automated tools for infrastructure build, day‑two support, and lifecycle management of security infrastructure using platforms such as Python, Terraform, vendor APIs, Algosec, Tufin, Jenkins, and Git.
• Collaborate closely with infrastructure, DevOps, and application teams to embed security best practices throughout the technology stack.

Requirements

• Extensive experience in network engineering and security engineering, with proven architectural experience in trusted, untrusted, and DMZ environments.
• Proven leadership experience in a senior or lead engineering role, capable of driving a team and working independently.
• Strong understanding of network protocols and the OSI model, with hands‑on experience in TCP/UDP‑based applications, routing, switching, and load balancing.
• Extensive knowledge of network security technologies, including firewalls, VPNs, proxies, MACsec, IPsec, HTTPS, certificate chains, DNS, NTP, AAA, and domain‑based authentication and authorisation.
• Expertise with multiple security vendors such as Palo Alto, Fortinet, Check Point, and F5.
• Strong understanding of Zero Trust principles, segmentation, and secure cloud networking in AWS or Azure.
• Familiarity with scripting and automation using Python, Ansible, or Terraform.
• Relevant certifications (e.g., CISSP, CCIE Security, GIAC GSEC/GCIH/GXPN, Palo Alto, Fortinet) are highly preferred.
• Must be legally authorized to work in the United States without employer sponsorship, now or at any time in the future.

Beneficial Skills and Experience

• Core network experience with VxLAN EVPN data‑center architecture.
• Experience with hybrid or multi‑cloud environments.
• Prior involvement in M&A technical integrations.
• Background in building SOC capabilities or working with MSSPs.
• Excellent written and verbal communication skills.
• Firewall automation experience.

Benefits & Perks

• Company‑paid lunch stipend (provided via GrubHub).
• 100% employer‑paid medical coverage in a high‑deductible health plan, plus dental and vision benefits for employees and families.
• 16 weeks of paid parental leave.
• Employee Assistance Program.
• Life insurance, short‑term disability, and long‑term disability.
• 401(k) with company match of 100% of contributions up to 6%.
• Optional employee‑paid benefits: PPO medical plan, Health Savings Accounts (with company contribution), Flexible Spending Accounts, supplemental life insurance, Wellhub, and more.
• Time off: 25 days of paid time off plus 12 company holidays.