Senior Network Security Engineer

Senior Network Security Engineer

Category: Information Technology Employment type: Contract Reference: BH-400822

Yoh has an exciting opportunity for a Senior Network Security Engineer to join our advanced technology client. This is a hands-on senior engineering role focused on securing and scaling complex enterprise network environments, with a strong emphasis on Palo Alto Networks, firewall architecture, network segmentation, VPN/security connectivity, and network automation.

Location: San Mateo, CA preferred; Washington, D.C. also strongly considered; additional locations may include Santa Clarita, CA; San Diego, CA; and Frisco, TX Type: Contract Compensation: $70-105/hr DOE Eligibility: Must be a U.S. Citizen or Green Card Holder (ITAR / CUI environment)

Responsibilities

• Engineer and support secure network infrastructure across corporate offices, data centers, remote locations, and cloud-connected environments.
• Configure, administer, and enhance Palo Alto Networks technologies, including PAN-OS, Panorama, GlobalProtect, threat protection, application controls, and related security capabilities.
• Manage firewall rules, network segmentation, NAT, site-to-site and remote-access VPNs, and secure connectivity solutions.
• Support network access controls, authentication technologies, and Zero Trust/SASE initiatives.
• Investigate network traffic, security events, connectivity issues, and vulnerabilities while assisting with remediation and incident response.
• Perform firewall upgrades, configuration hardening, lifecycle maintenance, and production changes.
• Troubleshoot complex routing, switching, WAN, wireless, firewall, application-access, and performance issues.
• Support secure network connectivity between enterprise infrastructure and cloud environments, including AWS and Azure.
• Collaborate with network, cloud, infrastructure, and cybersecurity teams on architecture and technical implementations.
• Develop automation for network and security operations using tools such as Terraform, Ansible, Python, or Bash.
• Create and maintain technical documentation, network diagrams, configuration standards, and operational runbooks.
• Provide senior-level escalation support for critical network and security incidents.
• Participate in planned maintenance, on-call support, and technical knowledge sharing with other engineers.

Qualifications

• 6+ years of professional experience supporting network security within complex enterprise or production environments.
• Advanced hands-on experience with Palo Alto Networks, particularly PAN-OS and Panorama.
• Strong understanding of firewalls, segmentation, NAT, VPN technologies, threat prevention, routing, switching, and network troubleshooting.
• Experience working with enterprise networking platforms such as Juniper, Cisco, or Arista.
• Hands-on experience with network automation or infrastructure-as-code tools such as Terraform, Ansible, Python, or Bash.
• Ability to independently lead technical initiatives and resolve complex, business-critical network and security problems.
• Strong written and verbal communication skills with the ability to work effectively across technical teams.
• Bachelor's degree in a technical field or equivalent combination of education and professional experience.

Preferred Qualifications:

• Experience with Palo Alto GlobalProtect, Prisma Access, Cloud NGFW, SASE, and/or Zero Trust architectures.

• Experience administering Juniper routing and switching technologies.

• Familiarity with Network Access Control solutions such as Aruba ClearPass or Mist Access Assurance.

• Knowledge of 802.1X, RADIUS, certificate-based authentication, and enterprise wireless environments.

• Experience supporting AWS and/or Azure networking.

• Relevant certifications such as PCNSE, CCNP Security, CCNP Enterprise, JNCIS/JNCIP, or comparable credentials.

• Previous experience supporting regulated, mission-critical, aerospace, defense, or highly technical engineering environments.

• Estimated Min Rate: 66.50

• Estimated Max Rate: 95.00

• What’s In It for You? We welcome you to be a part of the largest and legendary global staffing companies to meet your career aspirations. Yoh’s network of client companies has been employing professionals like you for over 65 years in the U.S., UK and Canada. Join Yoh’s extensive talent community that will provide you with access to Yoh’s vast network of opportunities and gain access to this exclusive opportunity available to you. Benefit eligibility is in accordance with applicable laws and client requirements. Benefits include:

• Medical, Prescription, Dental & Vision Benefits (for employees working 20+ hours per week)

• Health Savings Account (HSA) (for employees working 20+ hours per week)

• Life & Disability Insurance (for employees working 20+ hours per week)

• MetLife Voluntary Benefits

• Employee Assistance Program (EAP)

• 401K Retirement Savings Plan

• Direct Deposit & weekly epayroll

• Referral Bonus Programs

• Certification and training opportunities

• Note: Any pay ranges displayed are estimations. Actual pay is determined by an applicant's experience, technical expertise, and other qualifications as listed in the job description. All qualified applicants are welcome to apply.

• Yoh, a Day & Zimmermann company, is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.

• Stay Safe During Your Job Search

• 10-02-2026