7+ years of technical experience or relevant education and certifications
Advanced knowledge of routing protocols (BGP, OSPF)
Proficiency in VLAN and switching technologies
Strong understanding of secure remote access technologies
Experience with LTE/cellular connectivity
Excellent troubleshooting skills with packet analysis
Effective communication skills across technical teams and clients
Responsibilities
Lead design and implementation of infrastructure solutions for client projects
Design and troubleshoot routed and switched network environments
Perform advanced troubleshooting across various connectivity issues
Support infrastructure modernization and operational continuity
Develop standardized configurations and support processes
Collaborate with internal teams and client stakeholders
Support high-availability designs and secure communications
Benefits
401(k) and Roth 401(k) options
Comprehensive dental, health, life, and vision insurance
Employee Stock Purchase Plan (ESPP)
Generous paid time off policy
Performance-based bonuses
Training and career growth opportunities
Full Job Description
We are seeking a Senior Infrastructure Specialist to support the design, implementation, troubleshooting, and support of enterprise and industrial infrastructure environments across multiple client projects.
This is a senior-level technical role for someone who can operate independently in a fast-paced professional services environment and contribute across architecture, technical design, implementation, documentation, and advanced troubleshooting. The role is heavily focused on network and infrastructure systems that support operational technology and critical infrastructure environments, including data centers, industrial facilities, utility-related systems, and remote connectivity. Key Responsibilities
Lead the architecture, design, implementation, and ongoing support of infrastructure solutions across multiple concurrent client projects
Design, deploy, and troubleshoot routed and switched network environments for enterprise, industrial, and critical infrastructure systems
Perform advanced troubleshooting across routing, switching, firewall, wireless, LTE/cellular, cloud, remote access, and general infrastructure connectivity issues
Support infrastructure modernization, upgrades, expansions, migrations, and cutovers with a focus on reliability, maintainability, and operational continuity
Build and maintain standardized configurations, templates, and support processes to improve consistency across projects and client environments
Collaborate with internal team members, project managers, cybersecurity personnel, field teams, and client stakeholders to deliver high-quality technical outcomes
Support environments requiring resilient and secure communications, including high-availability designs, WAN connectivity, VPNs, and remote site connectivity
Support LAN, WAN, and wireless infrastructure design, implementation, and troubleshooting
Support Azure and/or AWS infrastructure and networking environments
Develop network designs including IP addressing schemes, segmentation strategies, and resilient architecture patterns
Develop and maintain technical documentation, including logical and physical network diagrams, Visio drawings, implementation plans, cut sheets, and as-built documentation
Required Qualifications
Minimum of seven (7) years of technical experience, or an equivalent combination of relevant education, certifications, and hands-on technical experience
Advanced knowledge of routing protocols including BGP, OSPF, HSRP, and VRRP
Proficiency in switching technologies including VLANs, STP, RSTP, RPVST+, and VPC
Strong understanding of IPsec, VPN, and secure remote access technologies
Experience with LTE/cellular connectivity solutions
Strong packet analysis and troubleshooting capability using packet captures, routing validation, and protocol-level diagnostics
Strong technical documentation and diagramming skills, including Microsoft Visio
Ability to manage and prioritize work across multiple active projects and support efforts
Effective communication skills for both technical teams and clients
Strong ownership, follow-through, and attention to detail
Preferred Qualifications
Experience in IT, OT, industrial, utility, power, or critical infrastructure environments
Experience with VMware, virtual networking, or virtualized infrastructure environments
Experience with Azure and/or AWS networking
Experience supporting multiple concurrent projects in a consulting, systems integration, or client-facing services environment
Cybersecurity experience, especially in segmentation, secure access design, firewall policy support, and infrastructure hardening
CISSP certification is a plus
Work Conditions
Must have a valid driver's license and be authorized to work in the United States
Subject to a background check, as well as drug and alcohol testing, per applicable federal regulations
Benefits:
401(k) and Roth 401(k)
Dental Insurance
Health Insurance
Life Insurance
Vision Insurance
Employee Stock Purchase Plan (ESPP)
Paid time off
Performance Bonus
Career Growth Opportunities and Training
About Tetra Tech
Tetra Tech, Inc. is an American engineering services company that provides consulting, engineering, program management, and construction management services. The company serves a range of industries, including water, environment, infrastructure, resource management, energy, and international development. Tetra Tech was founded in 1966 and is headquartered in Pasadena, California. The company operates in over 50 countries and has more than 20,000 employees.
