Network Administrator

Job Title: Network Administrator
Location: Texas (Houston, Occasional Travel to office when required)
Reporting to: Director, IT Infrastructure
Duration: 6-Month Contract-to-Hire

Summary: Bigrio is seeking a highly skilled and motivated Network Administrator to join our growing Infrastructure and IT Operations team. This role is responsible for designing, implementing, securing, and supporting enterprise-scale network environments across on-premises and cloud platforms.

The ideal candidate will have strong experience with modern networking technologies, hybrid cloud infrastructure, network security, and enterprise connectivity solutions. This position requires a proactive problem solver who thrives in a fast-paced environment and enjoys collaborating with cross-functional teams to build scalable, secure, and high-performing infrastructure solutions.

At Bigrio, we value innovation, continuous improvement, collaboration, and operational excellence. The Network Administrator will play a key role in ensuring the reliability, scalability, and security of the organization's infrastructure while supporting business growth and technology modernization initiatives.

Qualification:
Education:
Bachelor's degree in Computer Science, Information Technology, or a related field preferred
Equivalent professional experience and relevant industry certifications may be considered in lieu of a formal degree

Experience:
5+ years of progressive experience managing enterprise-scale network infrastructures in on-premises and cloud environments
Strong expertise in LAN, WAN, and WLAN design and implementation across multi-site environments
Hands-on experience operating Meraki-based enterprise networks, including:

MX (security & SD-WAN
MS (switching)
MR (wireless)
Centralized configuration, monitoring, and troubleshooting via the Meraki Dashboard

Strong experience with Palo Alto Networks firewalls, including:

Network segmentation and traffic inspection
Security policy design and enforcement
VPN connectivity (site-to-site and remote access)
Integration with hybrid and cloud-based network architectures

Proven experience designing and supporting hybrid Azure networking, including:

Virtual Networks (VNets), subnets, and IP addressing strategy
Network Security Groups (NSGs) and traffic controls
VPN and/or ExpressRoute connectivity
Hub-and-spoke or segmented network topologies

Experience supporting highly virtualized environments, including VMware and/or Hyper-V
Strong understanding of network security principles, including Zero Trust concepts, least-privilege access, and defense-in-depth
Demonstrated ability to design, diagram, document, and present both high-level and detailed network and infrastructure architectures
Experience with network capacity planning, performance optimization, and high-availability design
Familiarity with monitoring, telemetry, and alerting in complex network environments
Experience collaborating closely with infrastructure, cloud, security, application, and leadership teams

Professional Attributes:
Able to balance architectural best practices with pragmatic execution in a fast-paced environment
Strong self-management skills with a continuous improvement mindset
High attention to detail with a focus on reliability, security, and operational excellence
Enjoys working in a highly collaborative team where ownership and accountability are shared
Motivated to learn and apply new technologies and practices that advance the organization's infrastructure and security posture


Responsibilities:
Network Architecture & Engineering
Design, implement, and evolve enterprise network and hybrid-cloud architectures aligned with business, security, and compliance requirements
Define and maintain network standards, patterns, and reference architectures across on-prem and cloud environments
Engineer and support a hybrid Azure/on-prem network model, ensuring secure and reliable connectivity between environments
Design and maintain network segmentation strategies leveraging Meraki and Palo Alto platforms
Support modernization initiatives that enable distributed systems and service-oriented or microservices-based platforms

Operations, Reliability & Performance
Ensure reliable network connectivity for servers, virtual infrastructure, cloud workloads, and enterprise services
Configure, operate, and maintain:
Meraki switching, wireless, and SD-WAN infrastructure
Palo Alto firewalls and security policies
Perform capacity planning and proactively address performance, scalability, and resiliency risks
Implement and maintain monitoring, alerting, and testing strategies to proactively detect and resolve network issues
Act as support escalation for network and connectivity incidents

Security, Governance & Compliance
Apply network security best practices including segmentation, traffic inspection, and least-privilege access
Partner with security and compliance teams to support regulatory requirements, audits, and risk mitigation initiatives
Contribute to infrastructure governance through standardized configurations, documentation, and asset visibility
Participate in incident response and post-incident reviews related to network or security events

Collaboration, Documentation & Improvement
Work closely with infrastructure, cloud, security, and application teams to support platform and application needs
Produce and maintain clear, accurate network diagrams, technical documentation, and runbooks
Research, evaluate, and recommend new network technologies, tools, and approaches that improve reliability, security, and operational efficiency
Coordinate with vendors and third-party partners for implementation and support when required

General
Install and configure network hardware and software as needed
Maintain working knowledge of operating systems and enterprise applications as they relate to network operations
Adhere to company Code of Conduct and compliance policies
Perform other job-related duties as assigned

Physical demands and work environment:
Frequently required to sit
Frequently required to stand
Frequently required to utilize hand and finger dexterity
Frequently required to talk or hear
Frequently required to utilize visual acuity to operate equipment, read technical information, and/or use a keyboard
Occasionally exposed to bloodborne and airborne pathogens or infectious materials