Network Security Engineer

Overview

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 s 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.

• 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.

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.

• 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…