Network Security Engineer

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At Exxon Mobil, our vision is to lead in energy innovations that advance modern living and a net‑zero future. As one of the world’s largest publicly traded energy and chemical companies, we are powered by a unique and diverse workforce fueled by the pride in what we do and what we stand for.

The success of our Upstream, Product Solutions and Low Carbon Solutions businesses is the result of the talent, curiosity and drive of our people. They bring solutions every day to optimize our strategy in energy, chemicals, lubricants and lower‑emissions technologies.

We invite you to bring your ideas to Exxon Mobil to help create sustainable solutions that improve quality of life and meet society’s evolving needs.

Exxon Mobil’s state‑of‑the‑art campus north of Houston serves as home to its Upstream, Product Solutions and Low Carbon Solutions businesses and their associated service groups. The facility opened in 2014 and accommodates more than 10,000 employees and visitors.

The campus is designed to foster improved collaboration, creativity and innovation and enhance the company’s ability to attract, develop and retain the top talent in the industry. It is located in Spring, Texas, on 385 wooded acres immediately to the west of Interstate Highway 45 (I‑45), at the intersection of I‑45 and the Hardy Toll Road, approximately 25 miles from downtown Houston.

As a Network Security Engineer, you will play a critical role in designing, engineering, and managing the enterprise network security posture. You will ensure that the network infrastructure aligns with corporate security policies and standards, protecting against evolving cyber threats. This role involves operating and maintaining key security technologies—such as firewalls, IDS/IPS, and other advanced controls—while applying Dev Ops principles to drive automation, scalability, and resilience.

You will collaborate closely with network, infrastructure, application, and cybersecurity teams to support and enhance Exxon Mobil’s global IT services.

• Design, implement, and manage network security technologies and services across regions and different infrastructure environments (data centers, offices, edge).
• Research and recommend industry best practices and emerging technologies in network security.
• Operate and maintain network security appliances (Fortinet, Cisco, Juniper), including upgrades and patching.
• Build and manage network security infrastructure using Dev Ops practices and automation tools.
• Contribute to the Zero‑Ops infrastructure management vision by developing solutions that reduce manual intervention and improve operational efficiency.
• Support security operations: monitoring, analysis, incident response, and vulnerability management.
• Evaluate security advisories and vulnerabilities, providing timely recommendations and mitigations.
• Participate in ad‑hoc vulnerability assessments and incident response.
• Coordinate with stakeholders across Cybersecurity, Projects, and internal customers.
• Develop and maintain operational processes and documentation for ongoing support.

• Minimum 3 years of hands‑on experience in network security.
• Experience with network security platforms:
  Cisco ASA, FTD, Forti Gate, Juniper SRX.
• Strong understanding of networking fundamentals: TCP/IP, OSI model, routing/switching, ACLs.
• Familiarity with security technologies: firewalls, VPNs, IDS/IPS, encryption, authentication, vulnerability management, and incident response.
• Bachelor’s degree or higher in Computer Science, Computer Engineering, or IT‑related fields.

Deep knowledge of TCP/IP, Internet technologies, IPS/IDS, firewall virtualization, VPNs, NAT, DNS, etc.

Strong advantage: experience with Git Hub, Terraform, Ansible, Python, REST API, Jenkins, Jinja2, YAML.

Experience with AWS and Azure network security services.

• Excellent verbal and written communication in English.
• Mindset to grow and learn.
• S…