Network Security Engineer
Location: Dallas, TX
Overview
This organization is backed by dedicated leadership and investment, with a clear mission as it operates 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. Its 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 play a critical role in managing, implementing, and optimising a hyperscale network security infrastructure.
As a technical leader, you will oversee complex security architecture initiatives, mentor peer engineers, handle escalated incident response efforts, and ensure compliance with the latest security standards. The company roadmap is centred on automation, therefore a background in automation and interest in leveraging automation is key to this role.
Key Responsibilities
- Mentor junior and mid-level engineers, overseeing team activities and providing guidance in complex troubleshooting and architecture decisions.
- Implement and manage advanced security solutions using firewalls, proxy, system hardening, treat profiles, and segmentation strategies to secure the intellectual data.
- Act as a lead escalation for critical security incidents.
- Develop automation playbooks, network security policies framework and consolidation, treat model, and drive root cause analysis with corrective actions.
- Oversee network vulnerability assessments, penetration testing coordination, and remediation planning.
- Champion the integration of automated tools for infrastructure build, day two support, and lifecycle management of all security infrastructure using platforms like Python, Terraform, and vendor APIs, leveraging tools such as Algosec, Tufin, Jenkins, and Git.
- Work closely with infrastructure, DevOps, and application teams to embed security best practices throughout the technology stack.
Required Experience
- Extensive experience in network engineering and security engineering, along with proven architectural experience in trusted, untrusted, and DMZ environments.
- Proven leadership experience in a senior or lead engineering role, with the ability to drive the team and work individually.
- 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, 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.
- Certifications such as CISSP, CCIE Security, GIAC (GSEC/GCIH/GXPN), Palo Alto, Fortinet, or equivalent highly preferred.
Preferred Experience
- Core network with VxLAN EVPN DC architecture experience.
- 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 is beneficial.
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