Senior Network Security Engineer Jobs in Texas (NOW HIRING)

The Company NorthMark Compute & Cloud (NMC²) is backed by dedicated leadership and investment, and it operates at the bleeding edge of technology. Its goal is to scale and enhance the high‑performance computing (HPC) and cloud infrastructure that supports its clients’ research, production, and delivery, enabling breakthroughs that shape the industries of tomorrow.

• Contribute to the design, implementation, and delivery of scalable network security architecture and controls including firewalls, IDS/IPS, and VPNs across on‑premises and cloud environments.
• Serve as the team's primary subject matter expert for network security technologies, providing guidance and technical direction on complex security challenges.
• Apply technical depth and sound judgment to resolve complex network security challenges, making trade‑offs that balance security requirements with operational and delivery needs.
• Collaborate effectively with cross‑functional peers across infrastructure, cloud, and IT operations, communicating technical decisions and progress with clarity and ensuring alignment across teams.
• Develop and maintain network security standards, policies, and technical documentation.
• Support network segmentation and micro‑segmentation efforts by providing technical expertise on traffic flows, access controls, and policy enforcement.
• Participate in security architecture reviews for new projects, systems, and third‑party integrations to ensure network security requirements are addressed.
• Mentor junior security engineers and contribute to the overall growth and development of the network security team.

• 7+ years of experience in network security engineering, with hands‑on experience across trusted, untrusted, and DMZ environments.
• Strong understanding of network protocols and the OSI model, with practical experience in TCP/UDP‑based applications, routing, switching, and load balancing.
• Experience securing both on‑premises and cloud network environments (AWS, Azure, or GCP).
• Experience designing and securing network environments across both on‑premises and cloud platforms (AWS, Azure, or GCP).
• Proven ability to identify and deliver process improvements, automation opportunities, and tool enhancements within a security engineering function.
• Experience with security monitoring tools and SIEM platforms, with the ability to investigate and respond to network‑based threats.
• Strong understanding of security frameworks and hardening standards such as NIST, CIS Benchmarks, or ISO 27001.
• Effective communicator with the ability to articulate technical decisions and trade‑offs clearly to both technical peers and leadership.

• Relevant certifications such as CCNP Security, PCNSE, CISSP, or equivalent.
• Experience with VxLAN EVPN data center architecture.
• Background in SOC operations or working with MSSPs.
• Firewall automation experience.

The Company reserves the right to adjust, add to or eliminate any aspect of the above description. The Company also retains the right to require all employees to undertake additional or different job responsibilities when necessary to meet business needs. Must be legally authorized to work in the United States without the need for employer sponsorship, now or at any time in the future.

• Company‑Paid Lunch Stipend via GrubHub.
• 100% Employer‑Paid Medical in our 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% up to 6% of contributions.
• Optional Employee‑Paid Medical insurance in our PPO plan, Health Savings Accounts with 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 OR EXPRESSION, MARITAL STATUS, MENTAL OR PHYSICAL DISABILITY, AND 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.