Sr Network Security Engineer

Creative Solutions Services, LLC; Mechanicsville (VA); Hybrid; USD 120,000 - 150,000; Full time

Job summary

Creative Solutions Services, LLC in Mechanicsville, VA is seeking a Sr Network Security Engineer to implement and secure the agency's IT network, cloud, and computing infrastructure. The role focuses on day‑to‑day operations, design, and deployment of secure hybrid networks across 300 statewide locations.

The ideal candidate will lead incident response, manage firewall and WAF configurations (Palo Alto, Azure WAF), work with SIEM tools like Splunk and Microsoft Sentinel, and mentor junior

Qualifications

• Experience with incident response, security investigations, and log analysis.
• Experience with SIEM products (e.g., Splunk, Microsoft Sentinel).
• Experience in vulnerability management and remediation tracking; familiarity with Nessus/Tenable.

Responsibilities

• Ensure network security architecture aligns with security standards.
• Lead investigation and containment of security incidents.
• Review firewall rule requests for compliance with security standards.
• Design and maintain secure hybrid network architecture across on‑premises and Azure environments.
• Monitor security events using SIEM and coordinate incident response.
• Perform network security assessments and recommend remediation strategies.
• Develop and maintain network security standards, diagrams, and documentation.
• Support penetration testing and remediation efforts.
• Participate in on‑call support during critical security incidents.
• Proactively hunt threats and detect anomalies.
• Validate WAF and firewall placement and management of WAFs.

Skills

Enterprise Networking

Azure Networking

WAF/NGFW

Security Incident Response

SIEM (Splunk)

Vulnerability Management

Active Directory

MFA

Zero Trust

802.1X

Tools

Splunk SIEM

Microsoft Sentinel

Palo Alto

F5 BIG-IP

Azure WAF

Cisco VPN

GlobalProtect

Nessus

Tenable

Job description

Title: Sr Network Security Engineer

Location: Mechanicsville, VA(Hybrid)

Duration: 10 Months

Interview Type: In Person Only

Job Description:

Client 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 Client's infrastructure.

The Sr NSE performs day-to-day activities related to securing, documenting, performing research, analysis, design, and implementation of Client'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 Client'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.

Required/ Desired Skills:

• Enterprise Networking
• Enterprise Security
• Azure Networking
• 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
• Candidate must have experience in the following areas: Active Directory, MFA, Conditional Access, Certificates
• Candidate must have experience with; SEC530, CIS Benchmarks, NIST CSF, NIST 800-53, Zero Trust principles
• Candidate must have experience with the following: Cisco Client, NAC, 802.1X, RADIUS, TACACS
• Candidate must have experience with the following products: Palo Alto, F5 Distributed Cloud, Azure WAF, Cisco VPN, Global Protect, F5 BIG-IP
• Candidate must have experience working in highly regulated environments and leading technical troubleshooting during outages
• Candidate must have ability to communicate technical issues to technical and executive audiences and an ability to mentor junior engineers.
• Candidate should have achieved or ability to achieve the following certifications: Azure Security Engineer (AZ-500), Azure Network Engineer (AZ-700),