Network Security Engineer

The
Network Security Engineer
is responsible for safeguarding enterprise network infrastructure by designing, deploying, and operating security solutions that monitor, inspect, and protect network traffic at scale. This role ensures secure connectivity across corporate, retail, data center, and cloud environments. The engineer leverages advanced network visibility platforms, cloud-secured access technologies, and packet brokers to detect threats, prevent data loss, and maintain a resilient security posture.
This is an on site position located in Springfield, MO.
Responsibilities And Duties

• Design, implement, and operate network security controls including Zscaler ZIA/ZPA, Next‑Gen Firewalls, packet brokers, and network sensors.
• Optimize traffic flows, inspection policies, and routing to support business performance and security objectives.
• Ensure accurate telemetry and metadata feeds to SIEM/SOAR, MDR partners, and internal detection engineering teams.
• Develop automation and monitoring to improve reliability and reduce manual effort.
• Contribute to documentation, runbooks, playbooks, and architecture diagrams.
• Partner with Network Engineering, Infrastructure, Security Operations, and Application teams to deliver secure network solutions.
• Analyze network traffic patterns to identify anomalies, threats, policy violations, and performance issues.
• Administer and enhance Zscaler (ZIA/ZPA) configurations including policies, authentication methods, branch/store routing, and user experience optimization.
• Support Zero Trust Network Access (ZTNA) and secure application connectivity.
• Investigate and resolve network security incidents, including traffic anomalies, malicious communications, and access control issues.
• Provide packet-level analysis using tools like Zeek logs, PCAPs, and packet broker introspection.
• Assist in policy creation, security standards, and configuration baselines for enterprise network security.
• Produce KPIs, visibility dashboards, and reporting on network security posture, coverage, and gaps.

Skills
Required:

• Bachelor’s Degree in Computer Science or Computer Information Systems or equivalent work experience
• 4+ years’ experience in Information Technology
• Demonstrated leadership and interpersonal skills
• Strong background in network engineering, network protocols, packet analysis, and traffic inspection.
• Strong written and oral communication skills
• Ability to manage multiple tasks

Preferred

• Deep understanding of TCP/IP, routing, switching, DNS, TLS, HTTP/HTTPS, and network segmentation.
• Familiarity with Zero Trust principles, secure access service edge (SASE), and cloud security concepts.
• Experience integrating network telemetry with SIEM/SOAR tools.
• Designs, executes and reports on systems/service tests to ensure that an application functions as specified in the requirements.
• Archives, backs up, and restores data and servers to specified states.
• Determines and analyzes trends from data that is collected to assist in compiling reports that will help in decision-making.
• Shifts into and out of a mental mindset associated with assessing the facts and circumstances of the current situation and/or environment, and making the appropriate/innovative adjustments to thinking and work habits to thrive in any scenario.

Education: Bachelor's Degree or Equivalent Level
Experience: Experienced practitioner able to deal with the majority of situations and to advise others (3 to 6 years)
Managerial Experience: Experience with general supervision of more junior colleagues (7 to 12 months)
O’Reilly Auto Parts has a proven track record of growth and stability. O’Reilly is full of successful career stories and believes in a strong promote-from-within philosophy, encouraging you to grow your career along with the organization.
Total Compensation Package

• Competitive Wages & Paid Time Off
• Stock Purchase Plan & 401k with Employer Contributions Starting Day One
• Medical, Dental, & Vision Insurance with Optional Flexible Spending Account (FSA)
• Team Member Health/Wellbeing Programs
• Tuition Educational Assistance Programs
• Opportunities for Career Growth

*O’Reilly Auto Parts is an equal opportunity employer.*
*The Company does not discriminate on the basis of race, religion, color, national origin or ancestry (including immigration status or citizenship), sex, sexual orientation, gender identity, pregnancy (including childbirth, lactation, and related medical conditions,) age (40 and over), veteran status, uniformed service member status, physical or mental disability, genetic information (including testing or characteristics) or another protected status as defined by local, state, or federal law, as applicable.*
*Qualified individuals with a disability may be entitled to reasonable accommodation under the Americans with Disabilities Act. If you require a reasonable accommodation during the application or employment process, please send an email to:*
*rar@oreillyauto.com*
*or call (800) 471-7431 option , and provide your requested accommodation, and position details.*