Sr. Network Security Engineer Level 3

Must sit near Salisbury, NC or downtown Chicago. If hired full-time, the engineer will be required to go onsite 3 days a week. Contractors can work remotely but must be located close enough to come in as needed.

About the role

TEKsystems is seeking a skilled and proactive Network Security Engineer to join our customer’s Network Security team. This role focuses on designing, implementing, and maintaining secure network infrastructure with an emphasis on Palo Alto firewalls, Zscaler cloud security, and Aruba ClearPass for network access control. The ideal candidate will have a deep understanding of network security principles and hands-on experience with enterprise-grade security tools.

This organization is undergoing several major initiatives, including data center migrations, upgrades, and refreshes related to these technologies. They are also beginning their Zero Trust journey, offering the opportunity to make a significant impact.

Responsibilities

• Design, deploy, and manage Palo Alto Networks firewalls, including policy creation, threat prevention, and traffic analysis.
• Administer and optimize Zscaler Internet Access (ZIA) and Zscaler Private Access (ZPA) environments.
• Configure and maintain Aruba ClearPass for network access control, authentication, and endpoint compliance.
• Monitor network traffic and security alerts to identify and respond to threats in real-time.
• Collaborate with IT and security teams to enforce security policies and ensure compliance with industry standards.
• Conduct regular vulnerability assessments and recommend mitigation strategies.
• Maintain documentation for network security architecture, configurations, and procedures.
• Participate in incident response and root cause analysis for network-related security events.

Requirements

• Bachelor’s degree in Computer Science, Information Security, or a related field (or equivalent experience).
• 5+ years of experience in network security engineering roles.
• Hands-on experience with:
  • Palo Alto Networks firewalls and Panorama
  • Zscaler cloud security solutions (ZIA/ZPA)
  • Aruba ClearPass Policy Manager and Guest Access
• Strong understanding of TCP/IP, routing, switching, VPNs, and network protocols.
• Familiarity with security frameworks such as NIST, ISO 27001, or CIS Controls.
• Excellent troubleshooting and analytical skills.

Preferred Qualifications

• Relevant certifications such as:
  • PCNSE (Palo Alto Networks Certified Network Security Engineer)
  • Zscaler Certified Professional
  • Aruba Certified ClearPass Professional (ACCP)
• Experience with SIEM tools, IDS/IPS, and endpoint protection platforms.
• Knowledge of scripting or automation (Python, PowerShell, etc.) is a plus.

Skills

• Security
• Firewall
• Palo Alto
• Network security
• Network engineering
• Zscaler
• Fortinet (additional skill)

Pay

The pay range for this position is $55.00 - $75.00/hour.

Benefits

Eligibility requirements apply to some benefits and may depend on job classification and length of employment. Benefits are subject to change and may include:

• Medical, dental, and vision insurance
• Critical illness, accident, and hospital coverage
• 401(k) Retirement Plan (pre-tax and Roth post-tax contributions available)
• Life Insurance (voluntary life and AD&D for employee and dependents)
• Short- and long-term disability
• Health Spending Account (HSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, vacation, or sick leave)

Schedule

This is a hybrid position based in Chicago, IL, requiring onsite presence 3 days a week for full-time employees. Contractors may work remotely but must be located close enough to come in as needed.

About TEKsystems

TEKsystems is a partner in transformation, helping clients activate ideas and solutions to capitalize on new opportunities. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe, and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we drive change through true partnership.