Senior Network Security Engineer — HPC, Cloud & Automation

GTN Technical Staffing; Dallas (TX); Hybrid; USD 120,000 - 160,000; Full time

Job summary

GTN Technical Staffing is seeking a Senior Network Security Engineer - HPC & Cloud to design, implement, and optimize security across large-scale HPC, cloud, and mission-critical infrastructure environments. This hands-on engineering role combines network security architecture, incident response, automation, and technical leadership.

The successful candidate will work closely with Network Engineering, Platform, Infrastructure, and DevOps teams to strengthen security across distributed,

Qualifications

• 8+ years of experience in network engineering and network security.
• Experience designing and securing complex enterprise or data center networks.
• Strong knowledge of TCP/IP, routing, switching, load balancing, and OSI fundamentals.
• Deep experience with Palo Alto, Fortinet, Check Point, F5, or similar technologies.
• Experience implementing segmentation and Zero Trust architectures.
• Strong scripting and automation experience with Python, Terraform, Ansible, or similar tools.

Responsibilities

• Design and implement scalable network security architectures across on-premises and cloud environments.
• Develop segmentation strategies, Zero Trust controls, and secure network designs for HPC and distributed infrastructure.
• Configure and optimize firewalls, VPNs, proxies, load balancers, and advanced threat protection technologies.
• Support secure connectivity across trusted, untrusted, DMZ, and hybrid cloud environments.
• Serve as a senior escalation point for complex network security incidents.
• Lead root-cause analysis and drive corrective and preventative actions.
• Provide technical guidance on architecture, troubleshooting, and security best practices.
• Mentor engineers and support technical decision-making across the team.
• Build automation for security infrastructure provisioning, policy management, and lifecycle operations.
• Develop tooling and workflows using Python, Terraform, Ansible, APIs, and Git-based processes.
• Support firewall policy automation and orchestration using AlgoSec, Tufin, Jenkins, or similar technologies.
• Reduce manual security operations through repeatable automation and Infrastructure-as-Code practices.
• Support vulnerability assessments, penetration testing coordination, and remediation activities.
• Develop and maintain security policies, threat models, and technical standards.
• Partner with engineering teams to embed security into infrastructure and application environments.
• Support incident response, security monitoring, and risk-reduction initiatives.

Skills

Network security expertise

Automation scripting

Technical leadership

Incident response

Tools

Palo Alto

Fortinet

Check Point

F5

AlgoSec

Terraform

Ansible

Job description

GTN Technical Staffing is seeking a Senior Network Security Engineer - HPC & Cloud to design, implement, and optimize security across large-scale HPC, cloud, and mission-critical infrastructure environments. This hands-on engineering role combines network security architecture, incident response, automation, and technical leadership.

The successful candidate will work closely with Network Engineering, Platform, Infrastructure, and DevOps teams to strengthen security across distributed,