Senior Network / Security Engineer (Fortinet / Cisco)

Vaco LLC; Irving (TX); Hybrid; USD 135,000 - 165,000; Full time

Job summary

Vaco Recruiter Services is seeking a Senior Network Engineer to support network integration and optimization in Irving, TX. This role will involve overseeing the consolidation of multiple networks into a standardized enterprise configuration, utilizing technologies from Cisco and Fortinet.

The ideal candidate will have extensive experience with enterprise networking and security, excelling in a hybrid work environment. Key responsibilities include system management, technical troubleshooting, and mentoring junior staff.

Qualifications

• 9+ years of experience in Enterprise Network Engineering.
• Hands-on Cisco Networking experience (9+ years).
• 5+ years of experience with Fortinet Security.

Responsibilities

• Manage and optimize a large-scale enterprise network and security infrastructure.
• Resolve escalated technical issues and mentor junior engineers.
• Support acquired companies' network integrations and standardization activities.

Skills

Enterprise Network Engineering

Cisco Networking

Fortinet Security

Routing / Network Architecture

M&A Network Integration

Network Assessment / Migration Strategy

Tools

Cisco Nexus 7K/9K

FortiGate

SolarWinds

Job description

Senior Network Engineer (Fortinet / Cisco)

Details

Location: Irving, TX 75039 (hybrid 4 days [M-TH] per week onsite)

Position Type: Direct-Hire

Hourly / Salary: to $150K (based on experience)

Job Summary

Vaco is currently seeking a Senior Network Engineer (Fortinet / Cisco) for a Direct-Hire opportunity that is located in Irving, TX 75039 (onsite 5-days per week). The Senior Network Engineer will primarily focus on supporting the integration of acquired companies into the established enterprise network configuration, including assessment, standardization, and migration activities across network and security environments. The Senior Network Engineer will manage and optimize a large-scale enterprise network and security infrastructure and will design, implement, maintain and troubleshoot LAN / WAN, wireless, and data center networks, while ensuring high availability, performance, and security. Additionally, the Senior Network Engineer will resolve escalated technical issues, mentor junior engineers, lead network projects, perform capacity planning, maintain comprehensive documentation, and drive continuous process and systems improvements.

• Enterprise Network / Security Operations– Managing Enterprise Network / Security Infrastructure Supporting Availability / Integrity / Stability / Performance Across Large-Scale Environments | LAN / WAN / Wireless Networks / Routing / Switching Consistency / Routers / Firewalls / Switches / IP-Based Communication Systems
• Network Engineering / Administration– Designing / Implementing / Maintaining Enterprise Network Infrastructure | Supporting Performance Monitoring / Bottleneck Resolution / Capacity Planning / Infrastructure Scalability / Global Connectivity / Operational Stability
• Technical Support / Operations– Resolving Escalated Network Issues | Managing Monitoring / Alerting / Incident Activities / Enterprise Ticketing Processes / Operational Issue Resolution / Incident Documentation | Providing Advanced Troubleshooting Support
• Security / Governance– Maintaining Security Controls (Firewalls / Access Controls / Intrusion Detection) | Supporting Change Management / Operational Governance / Process Improvements / Enterprise Standards Alignment
• Infrastructure Delivery / Cross-Functional Collaboration– Managing Infrastructure Software / Hardware Initiatives / Technical Analytics / Reporting / Documentation / Knowledge Base Contributions | Coordinating Cross-Functional Resources Supporting Technology Projects / Enterprise Implementations
• M&A Network Integration– Supporting Acquired Company Network Integration / Infrastructure Standardization / Migration Activities | Aligning Legacy Environments to Enterprise Standards
• Documentation / Continuous Improvement– Developing Technical Documentation (Diagrams / Procedures / Configurations) | Supporting Technology Modernization / Process Enhancements / Operational Visibility / Long-Term Infrastructure Scalability

About the Project

The core mission is to lead the migration and standardization of a large, acquired network into an established enterprise “golden configuration.” This involves assessing the acquired environment, performing gap analysis, designing migration strategies, and executing large-scale cutovers across Cisco (Nexus 7k/9k / Catalyst) and Fortinet (FortiGate / SD-WAN / FortiManager) environments while maintaining HA and security. This role will require a combination of deep technical expertise in Cisco Routing / Switching and Fortinet Security with strong integration leadership to consolidate hundreds of sites into one standardized, high-performing network. This is a high-impact role blending hands‑on engineering, project leadership, and cross-team coordination during a critical growth phase, with the ultimate goal of unifying 2 large networks into one best-in-class enterprise infrastructure.

Job Requirements

• Enterprise Network Engineering (9+ years) – Data Center Infrastructure (advanced) / Cisco / Fortinet
• Cisco Networking (9+ years | hands‑on) – Design / Configuration / Troubleshooting | Cisco Nexus 7K/9K / Catalyst Routing/Switching Platforms
• Fortinet Security (5+ years) – Supporting FortiGate / FortiManager / FortiAnalyzer / Fortinet SD-WAN
• Routing / Network Architecture (deep expertise) – Across Routing Protocols (BGP / OSPF / EIGRP / Route Redistribution / Policy-Based Routing)
• M&A Network Integration – Network Integration / Consolidation / Standardization Initiatives Following Enterprise Mergers and Acquisitions
• Enterprise Network Transformation – Delivering Large-Scale Network Migrations into Standardized Enterprise “Golden Configuration” Models | Preserving Availability / Reducing Operational Disruption
• Network Assessment / Migration Strategy – Conducting Network Assessments / Gap Analysis / Migration Planning / Roadmap Development for Acquired Enterprise Environments

Preferred (not required)

• Fortinet Security Ecosystem (advanced) – FortiGate HA Clusters / Security Fabric / FortiSwitch / FortiAP / Integrated Security Components
• Network Access Control (NAC) – Implementing / Managing Cisco ISE for Enterprise Network Access Control / Policy Enforcement
• Enterprise Wireless Management – Supporting Ruckus Wireless Solutions for Large-Scale WiFi Infrastructure
• Network Monitoring / Observability – Utilizing SolarWinds for Network Monitoring / Performance Management / Reporting / Operational Visibility
• VPN / Secure Connectivity – Designing / Supporting Site-to-Site IPsec VPN / SSL VPN Solutions Enterprise-wide
• M&A Network Integration – Executing Large-Scale NW Integration / Post-Acquisition Consolidation Initiatives
• Network Standardization (Multi-Site) – Leading Multi-Site Network Standardization Across Distributed Enterprise Environments | Ensuring Consistency and Compliance