Network Security Engineer

NorthMark Compute and Cloud LLC; Dallas (TX); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Company‑Paid Lunch Stipend via GrubHub

100% Employer‑Paid Medical, Dental, and Vision benefits

16 weeks of Paid Parental Leave

401(k) with company match

25 days of Paid Time Off plus 12 company holidays

Job summary

NorthMark Compute and Cloud LLC is looking for a Senior Network Security Engineer to manage, implement, and optimize our hyperscale network security infrastructure. In this role, you will lead complex security initiatives, mentor fellow engineers, and ensure compliance with security standards.

The ideal candidate will possess extensive experience in network and security engineering, along with a strong background in automation and a passion for leveraging technology for improved security.

Qualifications

• Extensive experience in network engineering and security engineering.
• Proven leadership in a senior engineering role.
• Strong understanding of network protocols and OSI model.
• Expertise with security vendors like Palo Alto and Fortinet.
• Familiarity with scripting and automation.

Responsibilities

• Mentoring junior and mid-level engineers.
• Implementing advanced security solutions.
• Acting as lead for critical security incidents.
• Developing automation playbooks and security policies.
• Oversight of network vulnerability assessments.

Skills

Network engineering

Security engineering

Automation

Leadership

Network protocols

Zero Trust principles

Python scripting

Firewalls

VPNs

Cloud networking

Education

CISSP, CCIE Security, GIAC or equivalent

Tools

Python

Terraform

Jenkins

Algosec

Tufin

Job description

The Position 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. Our company roadmap is centred on automation, therefore a background in automation and interest in leveraging automation is key to this role.

Responsibilities

• Mentoring junior and mid-level engineers, overseeing team activities and providing guidance in complex troubleshooting and architecture decisions.
• Implementing and managing advanced security solutions using firewalls, proxy, system hardening, threat profile and segmentation strategies to secure intellectual data.
• Acting as a lead escalation for critical security incidents.
• Developing automation playbooks, network security policies framework and consolidation, threat model and driving root cause analysis with corrective actions.
• Overseeing network vulnerability assessments, penetration testing coordination and remediation planning.
• Championing 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.
• Working 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, 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 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.
• Certifications such as CISSP, CCIE Security, GIAC (GSEC/GCIH/GXPN), Palo Alto, Fortinet or equivalent highly preferred.
• Additional beneficial skills: core network with VxLAN EVPN DC architecture, hybrid or multi‑cloud environments, M&A technical integrations, SOC capabilities or MSSP experience, excellent written and verbal communication, firewall automation experience.

Benefits & Perks

• Company‑Paid Lunch Stipend via GrubHub.
• 100% Employer‑Paid Medical in a High Deductible Health Plan, Dental and Vision benefits for employees and their families.
• 16 weeks of Paid Parental Leave.
• Employee Assistance Program, Life insurance, Short‑Term Disability and Long‑Term Disability.
• 401(k) with company match 100% of contributions up to 6%.
• Optional Employee‑Paid Benefits such as PPO medical insurance, Health Savings Accounts (company contribution), Flexible Spending Accounts, Supplemental Life Insurance, Wellhub and more.
• 25 days of Paid Time Off plus 12 company holidays.

Equal Opportunity Employer

NorthMark Strategies LLC is an Equal Employment Opportunity Employer. The Company’s policy is not to discriminate against any applicant or employee based on race, color, religion, national origin, gender, age, sexual orientation, gender identity, marital status, mental or physical disability, genetic information, or any other basis protected by applicable law. The firm also prohibits harassment of applicants or employees based on any of these protected categories.