Senior Network Security Engineer

ZealHire Inc.; Mechanicsville (VA); Hybrid; USD 120,000 - 160,000; Full time

Job summary

ZealHire Inc. in Mechanicsville, VA seeks a Senior Network Security Engineer to design, implement, and sustain secure network and cloud infrastructure for a statewide enterprise.

This hybrid role requires 12+ years of experience, strong firewall, SIEM, and incident response skills, plus hands-on work with Palo Alto, Azure networking, WAF, and SD-WAN. Local candidates only; visa restrictions apply; in-person interview.

Qualifications

• 12+ years of network security engineering experience.
• Experience with hybrid enterprise networks and security controls.
• Proven ability to design and implement secure architectures.

Responsibilities

• Ensure network security architecture aligns with standards before and after deployment.
• Lead incident investigations and containment of security events.
• Review firewall rules for compliance with security standards.
• Design and maintain secure hybrid network architecture across on-prem and Azure.
• Monitor security events using SIEM and coordinate incident response.
• Perform network security assessments and remediation guidance.
• Develop security standards, diagrams, and documentation.
• Support penetration testing and remediation efforts.
• Participate in on-call support during critical incidents.
• Proactively hunt threats and detect anomalies.
• Validate WAF/firewall placement and manage agency WAF(s).
• Diagnose issues using logs, SIEM, and diagnostic tools.

Skills

WAF/NGFW

Incident response

Threat intelligence

Threat hunting

Splunk SIEM

Microsoft Sentinel

Nessus

Tenable

Firewall management

Tools

Splunk SIEM

Azure networking

Palo Alto Firewalls

ExpressRoute

Job description

Senior Network Security Engineer | JPC-7808

ZealHire. Mechanicsville, Virginia, United States Contract Deadline: Oct 20, 2026

Location : Mechanicsville,VA NEED LOCALS ONLY
Duration : 9 + Months
Visa : USC/GC ONLY
Interview: In Person Only
Position : Hybrid

Minimum 12+ years required

Description : VDOT is seeking an experienced Sr Network Security Engineer (Sr NSE) to implement and support the agency’s IT network, cloud, and computing infrastructure. The Sr NSE performs day-to-day activities related to securing VDOTs infrastructure.

The Sr NSE performs day-to-day activities related to securing, documenting, performing research, analysis, design, and implementation of VDOT’s network and computing related infrastructure.

The Sr NSE will support a hybrid enterprise environment consisting of approximately 300 statewide locations, Palo Alto firewalls, Azure networking, ExpressRoute connectivity, WAF technologies, Splunk SIEM, SD-WAN, and mission-critical public-facing applications. The role partners closely with Infrastructure, Cloud Engineering, and the Information Security Office to maintain the confidentiality, integrity, and availability of VDOT’s network infrastructure.

Key Responsibilities:

• Ensures network security architecture aligns with operational security standards prior to and after 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. Also leads implementation, review, and management of agency WAF(s).


• Identifies and diagnoses system problems and threats by using system logs, line monitors, SIEM, diagnostic software, and test equipment.


• Identifies, prioritizes, and remediates network security vulnerabilities.


• Must have the ability to provide documentation, network architecture topology diagrams, IP schemes, firewall rules, and access controls when required.


• Must have the ability to work independently on assigned projects.

Skils

Years of experience

Last Used

WAF/NGFW

Supporting environments with 300+ Network Devices

Candidate must have experience in the following areas: Incident response, Security investigations, Log analysis, Threat intelligence, Security monitor

Candidate must have experience with the SIEM products (e.g. Splunk, Microsoft Sentinel)

Candidate must have experience in vulnerability management and remediation tracking as well as vulnerability scanning tools (e.g. Nessus, Tenable, Def

$000,000 – $000,000 Salary range is not shown on the candidate portal