Network Security Engineer Jobs in Katy, TX (NOW HIRING)

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At ExxonMobil, 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 ExxonMobil to help create sustainable solutions that improve quality of life and meet society’s evolving needs. Learn more about our What and our Why and how we can work together.

ExxonMobil'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.

By bringing many global functional groups together, the campus provides employees with the tools and capabilities needed today, and in the future, to achieve business objectives and accelerate the discovery of new resources, technologies and products. It was 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.

The campus 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 the cultural vibrancy of downtown Houston.

The campus was constructed to the highest standards of energy efficiency and environmental stewardship. Its design incorporates extensive research into best practices in building and workplace design through extensive benchmarking of the world’s top academic, research, and corporate facilities.

Learn more about what we do in Houston here.

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 DevOps principles to drive automation, scalability, and resilience.

You will collaborate closely with network, infrastructure, application, and cybersecurity teams to support and enhance ExxonMobil’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 DevOps 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.

Skills & Qualifications

• Minimum 3 years of hands-on experience in network security.
• Experience with network security platforms: Cisco ASA (CSM), FTD (FMC), FortiGate (FortiManager), Juniper SRX (Junos Space).
• 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

Technical Skills

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

Relevant certifications (preferred but not required): Cisco (CCNA/CCNP Security), Fortinet (FCA/FCSS/NSE), CISSP, GIAC.

Automation & DevOps

Strong advantage: experience with GitHub, Terraform, Ansible, Python, REST API, Jenkins, Jinja2, YAML. Familiarity with CI/CD concepts and tools is a plus.

Cloud

Experience with AWS and Azure network security services.

• Excellent verbal and written communication in English.
• Mindset to grow and learn.
• Self-motivated, proactive, and able to work independently in a global virtual team.
• Strong multitasking and prioritization abilities.
• Analytical mindset and a collaborative team player.

An ExxonMobil career is one designed to last. Our commitment to you runs deep: our employees grow personally and professionally, with benefits built on our core categories of health, security, finance, and life.

We offer you:

Pension Plan: Enrollment is automatic and at no cost to you. The basic benefit is a monthly annuity to be paid to you in retirement for the rest of your life.

Savings Plan: You can contribute between 6% and 20% of your pay and are encouraged to enroll right away. If you contribute at least 6% to your savings plan, the Company will contribute a 7% match.

Workplace Flexibility: We have several programs such as “Flex your Day”, providing ad-hoc flexibility around when and where you work, as well as longer-term programs such as leaves of absence and part-time work.

Comprehensive medical, dental, and vision plans.

Culture of Health: Programs and resources to support your wellbeing.

Employee Health Advisory Program: Provides confidential professional counseling for you and your family, including tools and resources promoting mental health and resiliency at no additional cost to you.

Disability Plan: Income replacement for when you cannot work due to illness or injury occurring on or off the job. Enrollment is automatic and at no cost to you.

Please note benefits may be changed from time to time without notice,

ExxonMobil is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, sexual orientation, gender identity, national origin, citizenship status, protected veteran status, genetic information, or physical or mental disability.

Nothing herein is intended to override the corporate separateness of local entities. Working relationships discussed herein do not necessarily represent a reporting connection, but may reflect a functional guidance, stewardship, or service relationship.

Exxon Mobil Corporation has numerous affiliates, many with names that include ExxonMobil, Exxon, Esso and Mobil. For convenience and simplicity, those terms and terms like corporation, company, our, we and its are sometimes used as abbreviated references to specific affiliates or affiliate groups. Abbreviated references describing global or regional operational organizations and global or regional business lines are also sometimes used for convenience and simplicity. Similarly, ExxonMobil has business relationships with thousands of customers, suppliers, governments, and others. For convenience and simplicity, words like venture, joint venture, partnership, co-venturer, and partner are used to indicate business relationships involving common activities and interests, and those words may not indicate precise legal relationships.

Job ID: 82110

Nearest Major Market: Houston
Job Segment: Sustainability, Network, Network Engineer, Cisco, Energy, Technology, Engineering, Research