Senior Network Security Engineer

***This role requires on-site responsibility in the McLean, Virginia area.***

Our client, a pioneer in proactive exposure management and winner of the SC Award for Best CTEM Solution, helps organizations see, understand, and secure their hybrid digital environments across IT (on-prem, cloud, and remote workers), OT, and IoT. By dynamically modeling the entire environment, RedSeal uncovers hidden assets, misconfigurations, and lateral attack paths, prioritizes exposures based on business-critical impact with Risk Radius™, and continuously validates compliance with internal policies and industry standards. Trusted by hundreds of Fortune 1000 companies and more than 75 U.S. government agencies, including all five branches of the U.S. military, our client strengthens resilience, streamlines operations, and reduces business risk.

Our client is a leading enterprise cybersecurity platform company transforming how organizations secure their digital infrastructure. Our platform models complex networking environments (physical, cloud, hybrid) and delivers actionable intelligence that strengthens resilience, accelerates incident response, and maximizes security team productivity. We make large, messy networks visible and compliant—fast. You will lead complex deployments, integrate with customer stacks (cloud + on-prem), and turn security data into decisions. If you like both a terminal and a boardroom, you will fit here.

The Opportunity: Drive multi-million dollar Impact

Join our Professional Services team as a Senior Network Security Engineering Consultant and directly impact our clients' most critical security initiatives. You will architect and deploy cutting-edge security solutions in state-of-the-art environments, working with some of the largest and most complex networks in the world.

Drive Client Success & Revenue Growth

• Lead strategic deployments for our federal client with networks spanning 1000+ devices
• Architect solutions that align with client security objectives and deliver measurable improvements
• Support client success and identify opportunities for platform expansion
• Collaborate with stakeholders including technical teams, project managers, and security leadership

Technical Leadership & Innovation

• Deploy and optimize our platform across complex hybrid cloud environments
• Integrate with enterprise tools including Splunk, Azure Sentinel, ServiceNow, and SIEM platforms
• Develop automation scripts (Python/API) to streamline workflows and reduce manual effort
• Create custom workflows, dashboards, and reporting solutions for security compliance

Strategic Impact & Thought Leadership

• Support cross-functional teams through technical implementations and integrations
• Train client teams on security best practices and platform optimization
• Contribute insights to product development based on field experience
• Participate in industry events and client technical discussions

Must-have skills

• REQUIRED Security Clearance TS/SCI with a CI Poly or higher and willing to work on site.
• 5+ years in network/security engineering or architecture with customer-facing delivery.
• Network security at scale: routing/switching/firewalls/load-balancing; confident with IPv4/IPv6, NAT, BGP/OSPF/EIGRP, IPsec/GRE, MPLS/VPLS, VLANs/STP.
• Cloud & SIEM: real deployments in AWS/Azure plus Splunk or Microsoft Sentinel content (dashboards, detections, reports).
• Automation: Python for APIs/reporting/data normalization; comfortable with JSON/YAML/XML, or low code solutions like n8n, zapier, and nifi.
• Segmentation & exposure reduction: practical experience finding/fixing risky paths across hybrid estates.
• Compliance literacy: map controls and produce evidence (NIST RMF, DISA STIGs, PCI DSS, ISO 27001).
• Demonstrated business impact : Examples of driving revenue, cost savings, or efficiency improvements
• DoD 8140.03 formerly 8570 level II certification (e.g. CompTIA Security +, CySA+, Pentest +, CCNA, GIAC GSEC)

Nice-to-haves

• Reverse-engineering/extensibility (plugins, alternative data feeds), ServiceNow workflow integration.
• SOAR + scripting beyond Python (PowerShell/bash); Terraform/CloudFormation basics.
• Certs: CISSP, CCSP, CySA+, Security+, AWS/Azure Fundamentals, ITIL.
• Familiarity with AI-powered security tools, automated analysis, or machine learning applications

Responsibilities (day to day)

• Map customer objectives to platform capabilities; build a practical integration plan and execute it.
• Deliver standard + custom training and document work so it is repeatable.
• Propose adjacent value (new data sources, use cases, or automation that removes busywork).
• Communicate status crisply; escalate early; land the plane.

Work setup

• On site