Network Security Engineer, Senior

VC5 Consulting; Houston (TX); On-site; USD 120,000 - 180,000; Full time

Job summary

VC5 Consulting is seeking a Senior Network Security Engineer to lead and escalate complex security investigations across a global network. The role involves deploying and managing enterprise F5 Load Balancers and firewall policies, while administering CyberArk for privileged access and optimizing the Azure security stack with Sentinel and Defender for Cloud.

The candidate will also build security automation via PowerShell and Python, collaborating with Networking and Systems teams to strengthen

Qualifications

• 7+ years of progressive security engineering experience, from systems or network engineering into security.
• Experience deploying and managing enterprise firewall and F5 Load Balancers in large environments.
• Experience administering CyberArk for privileged access management, including vault configuration and access governance.
• Strong familiarity with Azure security tools (Microsoft Sentinel, Defender for Cloud).
• Solid understanding of TCP/IP, BGP, DNS, VPN, NAT in enterprise networks.
• Scripting in PowerShell and/or Python for security automation and tooling integrations.

Responsibilities

• Serve as Tier 2/3 escalation for complex security investigations across global network infrastructure.
• Design, deploy, and manage enterprise firewall solutions and F5 Load Balancers to enforce security policies.
• Administer Azure security stack (Microsoft Sentinel, Defender for Cloud) for threat visibility and response.
• Manage CyberArk privileged access infrastructure with policy enforcement and audit readiness.
• Tune SIEM/IDS to reduce noise and deliver actionable alerts to operations and leadership.
• Create security automation workflows using PowerShell and Python to streamline tasks.

Skills

F5 Load Balancers

CyberArk

Azure Sentinel

Defender for Cloud

PowerShell

Python

Incident response

Security automation

Networking fundamentals

Tools

F5

Microsoft Sentinel

Defender for Cloud

CyberArk

Job description

Our client, a global enterprise operating in a complex Microsoft and Azure environment, is seeking a Senior Network Security Engineer to serve as the cornerstone of their infrastructure security practice. In this role, you will function as the Tier 2/3 escalation point for advanced security investigations, partnering daily with Networking and Systems teams to architect and defend a high-scale, globally distributed infrastructure. You will own the full lifecycle of enterprise firewall and F5 Load Balancer deployments, manage privileged access through CyberArk, and drive meaningful security automation that reduces manual toil and strengthens organizational resilience. This is a hands-on leadership opportunity for an engineer who has grown from network and systems roots into deep security expertise and is ready to make a measurable impact on enterprise-wide security posture.

Key Responsibilities:

Serve as the Tier 2/3 escalation point for complex security investigations, leading incident analysis and response across global network infrastructure.

Architect, deploy, and manage enterprise firewall solutions and F5 Load Balancers to enforce network defense policies and ensure high availability.

Administer and optimize the Azure security stack — including Microsoft Sentinel and Defender for Cloud — to maximize threat visibility and detection coverage.

Manage CyberArk privileged access management infrastructure, ensuring least-privilege enforcement and audit-readiness across the environment.

Tune SIEM and IDS platforms to reduce noise, improve signal fidelity, and deliver actionable security alerts to operations and leadership.

Design and build security automation workflows using PowerShell and Python to streamline repetitive tasks and accelerate incident response capabilities.

Requirements:

7 or more years of progressive security engineering experience, with a career trajectory from systems or network engineering into a dedicated security function.

Deep hands-on expertise with F5 Load Balancers, including deployment, SSL offloading, and security policy configuration in enterprise environments.

Proven experience administering CyberArk for privileged access management, including vault configuration, session monitoring, and policy enforcement.

Strong command of Azure security tooling including Microsoft Sentinel, Defender for Cloud, and related identity and network protection services.

Solid understanding of networking protocols (TCP/IP, BGP, DNS, VPN, NAT) and enterprise firewall platforms at an architectural level.

Proficiency in scripting with PowerShell and/or Python to develop security automation, tooling integrations, and operational workflows.

Employment Type: Contract to Hire

Location: Houston, Texas 77042