Network Engineer

HF Sinclair is seeking a Network Engineer based in Dallas, TX. This role is a senior-level technical role responsible for the architecture, design, implementation, and operational support of enterprise network and connectivity services across on‑premises, hybrid, and cloud environments. This role serves as a subject matter expert for complex network technologies, provides technical leadership for large initiatives, and partners closely with infrastructure, security, cloud, and application teams to deliver resilient, scalable, and secure connectivity solutions that support evolving business needs. Job Duties Design, implement, and support enterprise network architectures across data center, campus, branch, and cloud environments Architect and operate hybrid connectivity solutions, including on‑prem to Azure integration (ExpressRoute, VPN, vWAN) Monitor health, performance, capacity, and availability of the enterprise network and cloud network services Lead and participate in incident response, root cause analysis, and post‑incident improvement efforts Serve as senior escalation point (Tier 3) for complex production network issues Provide strategic input and technical leadership for network modernization, cloud adoption, and digital initiatives Design and support routing, switching, wireless, SD‑WAN, load balancing, and firewall solutions Implement and maintain secure network connectivity aligned with Zero Trust and defense‑in‑depth principles Partner with Cloud, Security, Server, and Application teams to enable resilient application connectivity Evaluate emerging technologies and make architecture recommendations for short‑, mid‑, and long‑term initiatives Develop standards, reference architectures, and best practices for enterprise and cloud networking Automate routine network tasks using scripting and infrastructure‑as‑code tools where appropriate Coordinate and lead work with vendors, service providers, and managed services partners Produce clear technical documentation, diagrams, and operational runbooks Mentor junior engineers and act as technical lead on projects and initiatives Participate in scheduled maintenance windows and provide on‑call support as required Perform other duties and special assignments as determined by management Experience Minimum of 7 years of progressive experience in enterprise networking roles Demonstrated experience designing and supporting complex, multi‑site enterprise networks Strong hands‑on experience with: Routing and switching (BGP, OSPF, EIGRP, VLANs, VRF) Network security (firewalls, VPNs, segmentation, NAC, Load Balancers) Wireless networking and controller‑based architectures SD‑WAN technologies and architectures Proven experience with Azure networking, including: Virtual Networks (VNets), subnets, routing, NSGs, UDRs Azure VPN Gateway and ExpressRoute Azure Virtual WAN and hub‑and‑spoke architectures Load Balancers, Application Gateway, and private endpoints Experience operating in hybrid environments spanning on‑premises and public cloud Working knowledge of network monitoring, performance management, and troubleshooting tools Experience participating in or leading technical projects with cross‑functional teams Required Skills Expert understanding of OSI model Layers 1‑7 and modern network architectures Strong knowledge of TCP/IP, routing protocols, network security principles, and encryption Ability to design for high availability, fault tolerance, and scalability Solid understanding of cloud networking concepts and shared responsibility models Familiarity with Infrastructure as Code (IaC) concepts and tools (e.g., ARM, Bicep, Terraform) Working knowledge of automation and scripting (PowerShell, Python, or equivalent) Experience integrating networking with identity, security, and application services Strong analytical, troubleshooting, and problem‑solving skills Excellent written and verbal communication skills Ability to translate business requirements into technical solutions Capable of leading technical discussions and influencing architecture decisions Preferred Skills Experience with the following technologies and platforms: Cisco, Aruba, Arista switching and wireless platforms Palo Alto, Fortinet, or similar next‑generation firewalls Cloud‑native security services Experience with multi‑cloud networking (AWS or GCP exposure) Familiarity with DevOps, CI/CD pipelines, or SRE operating models Experience supporting regulated or industrial environments May act as technical lead or project lead on complex initiatives May provide task direction, mentoring, and technical guidance to other network engineers or contractors Work Conditions Primarily office‑based or hybrid, with travel up to 20% as required May include work in data center, refinery, plant, warehouse, or field environments Subject to on‑call rotation and participation in after‑hours maintenance windows Work may include nights, weekends, and holidays during scheduled or emergency activities Benefits Medical Insurance Vision Insurance Dental Insurance Paid Time‑Off 401(k) Retirement Plan with match Educational Reimbursement Parental Bonding Time Employee Discounts Physical Requirements Ability to sit, stand, walk, bend, and lift equipment up to 50 lbs. Ability to climb ladders and work in confined spaces when required Ability to wear required personal protective equipment as applicable Equal Opportunity Employer HF Sinclair Corporation is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status or any other prohibited ground of discrimination. #J-18808-Ljbffr