Overview

We are seeking an experienced and dependable Network Administrator to lead the support and evolution of our enterprise network infrastructure across on-premises and Microsoft Azure environments. This role requires a seasoned professional who thrives in a dynamic enterprise environment and brings demonstrated experience taking ownership of critical network operations from diagnosis through resolution.

This individual will play a key role in maintaining uptime, responding to incidents, and ensuring the stability and security of core network services across multiple locations and cloud platforms. The ideal candidate is hands-on, proactive, and comfortable operating under pressure, with the ability to troubleshoot complex issues quickly and effectively.

This position requires participation in an on-call rotation to support business-critical systems and respond to incidents as needed.

Responsibilities

Your key responsibilities

Azure & Hybrid Networking

Design, implement, and support Azure networking solutions, including:
- VNets, subnets, NSGs, UDRs
- VPN gateways (site-to-site and point-to-site)
- Azure Firewall, load balancers, public/private endpoints
Maintain and optimize hybrid connectivity between on-premises data centers and Azure.
Troubleshoot connectivity issues between cloud workloads, on-prem systems, and external services.
Support cloud migration efforts and ensure network readiness for new workloads.

Incident Response & On-Call Support

Respond to and resolve production-impacting incidents outside standard business hours.
Act decisively during outages, balancing speed and risk to restore service.
Lead root cause analysis (RCA) and implement corrective and preventive actions.
Work effectively under pressure while balancing competing priorities and time-sensitive issues.

Security & Operational Hardening

Implement and maintain secure network architectures, including:
- Firewall rule management
- Network segmentation and VLAN strategy
- Secure remote access
Partner with security teams on:
- Threat detection and response
- Vulnerability remediation
- Compliance initiatives
Ensure adherence to best practices in network security, Zero Trust principles, and least privilege access.
Support modern secure access approaches, including SASE/SSE concepts and related Zero Trust network access capabilities.

Infrastructure & Core Services

Support and maintain core network services:
- DNS, DHCP, IP address management
Ensure reliability of identity-driven connectivity (e.g., AD, Entra ID, authentication flows).
Maintain and improve monitoring, alerting, and visibility across network environments.
Leverage automation, scripting, monitoring platforms, and AI-assisted troubleshooting where appropriate to improve network operations, documentation, incident response, and service reliability.
Develop and maintain accurate network diagrams, documentation, and runbooks.

Project Execution & Continuous Improvement

Lead or contribute to infrastructure projects such as:
- Network redesigns and optimization
- Hardware lifecycle management
- Site deployments and expansions
- Cloud adoption initiatives
Continuously identify opportunities to improve resiliency, scalability, and operational efficiency.
Evaluate and recommend new technologies and approaches to modernize the network environment.
Manage and coordinate with key vendors and service providers, including ISPs, MSPs, firewall vendors, Microsoft, and other network technology partners.

Qualifications

Required Qualifications

5 years of hands-on experience in network administration in enterprise environments.
Strong expertise in:
- Routing and switching
- VLANs and subnetting
- DNS, DHCP, TCP/IP
- Firewall and VPN technologies
Proven experience with Microsoft Azure networking and hybrid connectivity.
Demonstrated ability to troubleshoot complex, multi-layered network issues under pressure.
Experience supporting mission-critical systems with high availability requirements.
Working knowledge of automation and scripting tools such as PowerShell, Python, Terraform, Bicep, or other infrastructure-as-code approaches.
Familiarity with SASE/SSE technologies or concepts, such as Zscaler, cloud proxy, secure web gateway, private access, or comparable secure access platforms.
Ability to work independently and take full ownership of issues from identification through resolution.

EEO/AA Employer M/F/D/V

Walbridge is an equal opportunity employer with a culture that promotes diversity, equity, and inclusion in the workforce. We provide equal employment opportunities to all qualified employees and applicants for employment without regard to race, color, national origin, sex, religion, age, marital status, sexual orientation, gender identity, citizenship status, status as an individual with a disability, military, or protected veteran status or any other legally protected status. We prohibit discrimination in decisions concerning career development, recruitment, hiring, compensation, benefits, training, termination, promotions, or any other condition of employment.

Walbridge

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