System Administrator Network Engineer Dallas TX

System Administrator / Network Engineer Position Overview

We are seeking a skilled System Administrator / Network Engineer to support, modernize, and secure our multi‑site IT infrastructure. This role is hands‑on, operational, and project‑focused—spanning Microsoft 365, Azure, network engineering, firewall/wireless modernization, endpoint management, and cross‑team collaboration.

You will play a key role in our transition from Fortinet/Forti Gate firewalls, switches, and APs to an Ubiquiti Uni Fi‑based infrastructure, while also supporting ongoing Azure, Microsoft 365, SD‑WAN, and site‑to‑site modernization efforts.

Who are we? Building Controls & Solutions (BCS) is a leading provider of energy management, building controls, automation, and gas detection solutions for the commercial HVAC community, including distribution of products, in‑market value added services, and a “smart” path towards using IoT and the Cloud for building automation. Serving mechanical, electrical and controls contractors working in the Commercial building markets, as well as end users (property management companies, school districts, hospitals, etc.)

and integrators, the company offers a wide array of HVAC controls, gas detection systems, flow measurement, security and access control, lighting control, wireless, analytics and IoT technologies. As a distributor and service provider, BCS brings global product brands and inventory together with local in‑market technical resources. “Our value starts with high quality products and is truly enhanced by solutions that bring customized value‑added services to our commercial building customers every day,” says CEO, Eric Chernik.

www.bui

• Manage Microsoft 365/Entra  lifecycle, licensing, MFA, Conditional Access, and security baselines.
• Support Azure network integrations including firewalls, VNET gateways, routing, and hybrid connectivity.
• Manage Windows endpoints and servers; automate administrative tasks with Power Shell.
• Maintain compliance and security posture across enterprise endpoints.
• Administrate endpoint monitoring, patching, and deployment using Ninja One.

• Support current Fortinet/Forti Gate infrastructure during transition, including firewall policies, NAT, VPN/IPsec tunnels, VLANs, and multi‑site routing.
• Participate in the organization‑wide migration from Fortinet/Forti Gate to Ubiquiti Uni Fi by:
  • Designing Uni Fi gateway, switching, and wireless architectures.
  • Standing up and managing Uni Fi Network Controllers / Uni Fi OS.
  • Migrating sites from Fortinet to Uni Fi with minimal downtime.
  • Converting firewall policies, SSIDs, VLANs, and routing configurations.
  • Documenting Uni Fi baselines, standards, and deployment procedures.
• Maintain stable and secure multi‑site connectivity, including SD‑WAN, VPN, and cloud‑connected services.

• Maintain identity, endpoint, network, and cloud security baselines.
• Review and update firewall rules, segmentation, and zero‑trust‑aligned controls.
• Respond to incidents across endpoints, identity, network, and cloud.
• Ensure consistent patching, alerting, and configuration hardening.

• Act as Tier‑3 escalation for complex tickets involving networking, cloud, identity, and endpoint issues.
• Produce runbooks, SOPs, and configuration documentation.
• Collaborate with MSPs, vendors, and cross‑functional internal teams.
• Contribute to change management through planning, testing, and approvals.

• Lead or support projects such as:
  • Site network cutovers and SD‑WAN transitions.
  • Azure connectivity improvements.
  • Endpoint fleet modernization.
  • Wireless redesigns.
  • Firewall and network segmentation transformations.
• Evaluate and implement emerging technologies to strengthen performance, security, and operational efficiency.

• 5+ years combined experience in system administration and network engineering.
• Strong hands‑on knowledge of Microsoft 365/Entra , Windows Server, and Azure fundamentals.
• Experience administering firewalls (Fortinet preferred)…