Network Engineer

Basic Function

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 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

Special assignments or tasks assigned to the employee by their superior, as determined from time to time in their sole and complete discretion.

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

Education Level

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

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 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

Supervisory/Managerial Responsibility 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

HF Sinclair offers a comprehensive benefits package designed to support the well-being of our employees and their families. Our benefits include, but are not limited to, the following: Medical Insurance

Vision Insurance

Dental Insurance

Paid Time-Off

401(k) Retirement Plan with match

Educational Reimbursement

Parental Bonding Time

Employee Discounts

We are committed to fostering a supportive and inclusive work environment, ensuring our employees have the resources needed to thrive professionally and personally. Benefit eligibility is governed by official plan documents, for more details visit Total Rewards.

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

Our One HF Sinclair Culture:

At HF Sinclair, we are united through our One HF Sinclair Culture, which is underpinned by our five core values of Safety, Integrity, Teamwork, Ownership and Inclusion. Developed to empower our people, our five core cultural values are at the heart of everything we do and extend to how we engage our stakeholders. These values influence our decisions, shape our behaviors and keep us connected across the entire organization. We maintain a true Safety culture for our employees, communities, environments and customers. Our goal is to make sure everyone returns home safely each day. We have a long-standing commitment to Integrity and ethical behavior and do what is right for our employees, investors, communities and the environment. We encourage employees to Step Up and Stand Out by championing a culture of Teamwork and Ownership. We foster a culture of Inclusion by encouraging diversity of experiences, viewpoints and backgrounds. What makes each of us different, together makes us stronger.

About HF Sinclair Corporation

HF Sinclair Corporation, headquartered in Dallas, Texas, is an independent energy company that produces and markets high-value light products such as gasoline, diesel fuel, jet fuel, renewable diesel and other specialty products. HF Sinclair owns and operates refineries located in Kansas, Oklahoma, New Mexico, Wyoming, Washington and Utah and markets its refined products principally in the Southwest U.S., the Rocky Mountains extending into the Pacific Northwest and in other neighboring Plains states. HF Sinclair supplies high-quality fuels to more than 1,500 branded stations and licenses the use of the Sinclair brand at more than 300 additional locations throughout the country. In addition, subsidiaries of HF Sinclair produce and market base oils and other specialized lubricants in the U.S., Canada and the Netherlands, and export products to more than 80 countries. Through its subsidiaries, HF Sinclair produces renewable diesel at two of its facilities in Wyoming and also at its facility in Artesia, New Mexico. HF Sinclair provides petroleum product and crude oil transportation, terminalling, storage and throughput services to its refineries and the petroleum industry.

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.