Senior Network Security Engineer - Hybrid Cloud Defense

Mbi Llc; Mechanicsville (VA); Hybrid; USD 110,000 - 140,000; Full time

Job summary

VDOT is seeking an experienced Sr Network Security Engineer to implement and support the agency’s IT network, cloud, and computing infrastructure, including Azure networking, Palo Alto firewalls, and WAF technologies.

The Sr NSE will lead security operations, perform threat hunting, vulnerability management, and incident response; collaborate with Infrastructure, Cloud Engineering, and the Information Security Office to ensure confidentiality, integrity, and availability across 300+ locations.

Qualifications

• Experience in designing and implementing secure, hybrid network architectures.
• Experience leading investigations and containment of security incidents.
• Ability to communicate technical issues to technical and executive audiences and mentor junior engineers.
• Experience with regulatory environments and outage troubleshooting.

Responsibilities

• Ensures network security architecture aligns with operational security standards prior to deployment.
• Lead investigation and containment of network security incidents.
• Review firewall rule requests and ensure compliance with security standards.
• Design and maintain secure hybrid network architecture across on-premises and Azure environments.
• Monitor security events using SIEM technologies and coordinate incident response activities.
• Perform network security assessments and recommend remediation strategies.
• Develop and maintain network security standards, diagrams, and operational documentation.
• Support penetration testing and remediation efforts.
• Participate in on-call support during critical security incidents.
• Responsible for conducting proactive threat hunting and anomaly detection.
• Validates WAF and firewall placement and integration exposure/connectivity; leads implementation and management of agency WAFs.
• Identify and diagnose system problems and threats using logs, SIEM, and diagnostic tools.
• Identify, prioritize, and remediate network security vulnerabilities.
• Provide documentation, topology diagrams, IP schemes, firewall rules, and access controls when required.
• Work independently on assigned projects.

Skills

Network security engineering

Incident response

Threat hunting

WAF/NGFW

300+ devices

SIEM (Splunk/Microsoft Sentinel)

Vulnerability management

AD/CA/Certificates

NIST/CIS/Zero Trust

Cisco ISE/NAC/802.1X/RADIUS/TACACS

Palo Alto / F5 / Azure WAF

Tools

Palo Alto

F5 BIG-IP

Azure WAF

Cisco VPN / GlobalProtect

Job description

VDOT is seeking an experienced Sr Network Security Engineer to implement and support the agency’s IT network, cloud, and computing infrastructure, including Azure networking, Palo Alto firewalls, and WAF technologies.

The Sr NSE will lead security operations, perform threat hunting, vulnerability management, and incident response; collaborate with Infrastructure, Cloud Engineering, and the Information Security Office to ensure confidentiality, integrity, and availability across 300+ locations.