Network Engineer Job at HF Sinclair (Dallas)

Job Description

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. The ideal candidate combines deep traditional networking expertise with hands-on experience in Azure and cloud networking, automation, and modern network operating models.

Job Responsibility

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

Requirements

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
Bachelor's degree in Computer Science, Information Technology, or related field or equivalent experience
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

Nice to have

Azure certifications (e.g., Azure Network Engineer Associate, Azure Solutions Architect)
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

What we offer

Medical Insurance
Vision Insurance
Dental Insurance
Paid Time-Off
401(k) Retirement Plan with match
Educational Reimbursement
Parental Bonding Time
Employee Discounts

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