Senior Network Systems Engineer

Job Title: Senior Network & Infrastructure Systems Engineer

Role Overview
We are seeking an ownership-driven Senior Network & Infrastructure Systems Engineer to design, secure, and manage our enterprise communications and data backbone. In this senior role, you will lead the full lifecycle of our corporate networking environments-spanning high-availability LAN/WAN routing, wireless deployments, legacy and modern telephony (VoIP/PBX), and critical data center physical assets.
This position requires a technical strategist who can blend advanced network troubleshooting with solid fiscal responsibility. You will oversee operational infrastructure budgets, direct cross-functional IT deployments, manage essential vendor relationships, and ensure all systems adhere to strict regulatory security hardening benchmarks.

Key Responsibilities
Network Architecture & Operational Hardening
System Design & Delivery: Architect, deploy, and maintain robust enterprise network and communications topologies, including LAN, WAN, corporate WiFi, voice/PBX systems, and physical data center footprint infrastructure.
Security & Patch Lifecycle: Execute complex hardware, network operating system, and application software security updates; implement strict operating system hardening guidelines to protect data assets.
Capacity Engineering: Monitor system metrics continuously to plan, model, and execute network capacity expansions and hardware refreshes before operational bottlenecks occur.
Safety & Compliance: Ensure all infrastructure operations and server-room physical deployments align seamlessly with corporate compliance mandates, industry safety standards, and strict internal security policies.

Technical Operations & Incident Response
Expert Troubleshooting: Diagnose and remediate highly complex network bottlenecks and tier-3 structural failures, actively driving down system downtime and protecting operational continuity.
Vendor Governance: Manage critical IT vendor partnerships; negotiate maintenance agreements, review service contracts, and audit deliverables to guarantee strict compliance with SLA agreements.
Lifecycle Deployments: Direct physical hardware staging and rack installations, assisting cross-functional engineering teams with storage and core network deployments.
On-Call Management: Formulate and participate in a standard on-call rotation schedule, taking full ownership of planned after-hours system maintenance and network interventions.

Project Governance & Financial Management
Project Delivery: Act as the technical lead for complex infrastructure initiatives, taking responsibility for complete scoping, timeline mapping, and final task delivery.
Fiscal Accountability: Manage assigned capital budgets ($CAPEX$) and infrastructure operational funds ($OPEX$), tracking project resource expenditures to keep milestones aligned with corporate strategy.
Executive Presentation: Synthesize performance, capacity, and vulnerability metrics into clear, scannable documentation; prepare formal technical architecture presentations for business and technology leaders.

Qualifications & Requirements
Minimum Qualifications
Education: Bachelor's degree in Computer Science, Information Technology, Computer Engineering, or a related technical field.
Experience Baseline: Minimum of five (5) years of dedicated experience managing enterprise network routing, multi-site infrastructure, and critical communications platforms.
Technical Footprint:
oProven hands-on mastery over layer-2/layer-3 routing, edge security firewalls, SD-WAN topologies, and corporate wireless environments.
oDemonstrable experience maintaining enterprise telephony infrastructure (VoIP, hosted, or legacy PBX frameworks).
oClear experience with server architecture, data center storage area networks (SAN), and systems monitoring suites.

Core Competencies
Strong requirements gathering, analytical project management, and structural problem-solving skills.
Exceptional written and verbal communication habits with a proven track record of maintaining positive relationships across matrixed business and technology stakeholders.

Equal Opportunity Employer / Disabled / Protected Veterans

The Know Your Rights poster is available here:
_EEOC_KnowYourRights6.12.pdf

The pay transparency policy is available here:
_%20English_formattedESQA508c.pdf

For temporary assignments lasting 13 weeks or longer, AllSTEM Connections is pleased to offer major medical, dental, vision, 401k and any statutory sick pay where required.

We are committed to working with and providing reasonable accommodations to individuals with disabilities. If you need a reasonable accommodation for any part of the employment process, please contact your staffing representative who will reach out to our HR team.

AllSTEM Connections participates in the E-Verify program in certain locations as required by law. Learn more about the E-Verify program.
_Participation_Poster_ES.pdf

We also consider for employment qualified applicants regardless of criminal histories, consistent with legal requirements, including, if applicable, the City of Los Angeles' Fair Chance Initiative for Hiring Ordinance. Pursuant to applicable state and municipal Fair Chance Laws and Ordinances, we will consider for employment-qualified applicants with arrest and conviction records, including, if applicable, the San Francisco Fair Chance Ordinance. For Los Angeles, CA applicants: Qualified applications with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act.

Additional Skills

(none specified)

AllSTEM Representative Contact Info

Account Executive:

Nichols

Branch Phone:



Location:

Ontario, CA