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# Senior Network Security Engineer

- **Company:** AppLab Systems Inc
- **Location:** Houston, TX, United States
- **Experience:** Expert
- **Contract:** Temporary contract
- **Skills:** Application Programming Interfaces (APIs), Amazon Web Services, Microsoft Azure, Cloud Engineering, Cyber Security, Data Centers, Fault Tolerance, Identity and Access Management, IT Management, Intrusion Detection and Prevention, Intrusion Detection Systems, Virtual Private Networks (VPN), Network Security, Routing, Network Segmentation, Zero Trust Network Access, Security Information and Event Management, Wide Area Networks, Web Applications, Private Cloud Environment, Computer Networking Systems, Google Cloud, Load Balancing, In-Plane Switching (IPS), Software Security, Firewalls (Computer Science), Juniper, Fortinet, Firewall Services Module
- **Published:** October 29, 2026
- **Apply:** https://www.thejobnetwork.com/job/af1b20fc-0578-429d-bea0-28fc4378c432/senior-network-security-engineer

## About the Role

* Strong hands-on experience in designing and implementing network segmentation using enterprise firewalls (Juniper SRX preferred) in complex environments.
 * Proven capability to build application-aware firewall policies based on traffic flow analysis.
 * Experience with policy design, enforcement, monitoring, and optimization in firewall-based segmentation environments.
 * Strong understanding of east-west traffic inspection, security zoning, and firewall-enforced segmentation.
 * Familiarity with Zero Trust Network Access (ZTNA) and identity-driven access models.

Network Security & Infrastructure

 * Strong experience managing LAN/WAN security technologies, including firewalls, IDS/IPS, SIEM, VPN, and NAC.
 * Expertise in firewall architecture and design with strong hands-on experience in Juniper SRX (primary), along with Fortinet and Palo Alto.
 * Deep expertise in:

 * Security zones, policies, NAT, routing
 * Application control and threat prevention
 * High-availability clustering and scale design

 * Experience securing public and private cloud (AWS, Azure, GCP) environments.
 * Design and implementation of Web Application and API Protection (WAAP) solutions.
 * Strong experience in proxy (forward/reverse), load balancing, and application security integration.
 * Experience with SDN and SD-WAN architectures, including segmentation use cases.

Networking & Protocol Expertise

 * Strong knowledge of Juniper

## Description

* Translate high-level business strategic objectives and goals into Enterprise IT requirements and conceptual designs.
 * Develop and support comprehensive solutions that meet requirements and align with Client global network security and strategy using Juniper SRX platforms.
 * Develop and maintain a multi-year strategic network and security architecture roadmap, incorporating Zero Trust and firewall-based segmentation models.
 * Lead end-to-end network and security architecture across global platforms ensuring secure, high-performing, fault-tolerant, and resilient environments. Segmentation & Zero Trust Responsibilities (Juniper SRX Focus)
 * Architect and implement network segmentation strategies using Juniper SRX firewalls across data center, campus, and cloud environments to limit lateral movement and enforce least-privilege access.
 * Design and operationalize Zero Trust Architecture (ZTA) principles, integrating identity, application, and network-based policy enforcement using firewall controls.
 * Collaborate with application owners to Client, validate, and map application dependencies to enable policy-driven segmentation via firewall rules and security zones.
 * Define and enforce granular security policies using zone-based segmentation,VRFs, and SRX policy constructs across hybrid environments.
 * Integrate segmentation with firewalls, SIEM, IAM, EDR/XDR, and cloud-native controls for unified policy enforcement.
 * Lead adoption and standardization of Juniper SRX as the primary segmentation enforcement platform across enterprise environments.
 * Develop segmentation governance models, policy lifecycle management, and compliance alignment (CIS/NIST/Zero Trust frameworks).

Core Network Security Responsibilities

 * Participate in network security design reviews and ensure all implementations meet enterprise security standards.
 * Analyze business requirements to design and implement security across data centers, campus networks, and hybrid environments.
 * Provide ongoing risk metrics, control effectiveness tracking, and security posture reporting.
 * Conduct and support internal and external security audits and compliance assessments.
 * Maintain awareness of emerging threats and update policies accordingly.
 * Develop and manage policies, processes, and procedures ensuring reliability, availability, and security of network systems.
 * Manage and optimize Security Information and Event Management (SIEM) systems.
 * Collaborate with Cyber Security, infrastructure, and application teams toward compliance and operational excellence.