{"id":3970615,"url":"https://alion.io/job/shamrock-trading-corporation-security-engineer-networking","title":"Security Engineer - Networking","company":{"id":3913528,"name":"Shamrock Trading Corporation","domain":"shamrocktradingcorp.com","url":"https://alion.io/company/shamrock-trading-corporation","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Dayforce","truth_index":{"grade":"A","score":97,"open_postings":88,"ghost_share":0,"stale_share":0.102,"repost_share":0,"time_to_fill_p50_days":42,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Security","role_family":"Security","seniority":"middle","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Overland Park, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Crowdstrike","optional":false},{"name":"Defense in Depth","optional":false},{"name":"Microsoft Sentinel","optional":false},{"name":"SIEM","optional":false},{"name":"Splunk","optional":false},{"name":"VPN","optional":false},{"name":"Zero Trust","optional":false}],"status":"live","first_seen_at":"2026-11-09T07:00:00Z","employer_posted_date":"2026-11-09","last_verified_at":"2026-11-13T15:33:15Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"About the Role \nShamrock is seeking a Network Security Engineer to join our Cyber Security team and help protect the organization's network infrastructure through the administration and support of enterprise firewall technologies and network security controls. \nThis role is ideal for a security professional with 3+ years of experience who enjoys hands-on technical work and wants to continue growing within cybersecurity. The Network Security Engineer will focus on firewall operations, network segmentation, access control management, threat detection, and security incident support while partnering closely with Infrastructure, Networking, and Security teams. \nThe ideal candidate possesses a strong foundation in networking and cybersecurity, experience supporting enterprise firewall platforms, and a passion for protecting systems and data from evolving cyber threats. \nWhat You’ll Do \nConfigure, manage, and maintain enterprise firewall environments to ensure secure and reliable network operations. \nImplement, modify, and troubleshoot firewall policies and access control rules based on business and security requirements. \nMonitor network traffic and security alerts to identify potential threats, vulnerabilities, and suspicious activity. \nSupport VPN technologies, secure remote access solutions, and network segmentation initiatives. \nInvestigate and resolve firewall-related connectivity and security issues. \nParticipate in the deployment, maintenance, patching, and lifecycle management of firewall and network security devices. \nConduct periodic firewall rule reviews and assist with access recertification efforts. \nPartner with Security Operations, Infrastructure, and Network teams to strengthen security controls and improve threat visibility. \nAssist with network-based security investigations and incident response activities. \nSupport vulnerability remediation efforts related to network infrastructure and security devices. \nMaintain accurate documentation of firewall configurations, network diagrams, and security procedures. \nHelp ensure compliance with organizational security standards, policies, and industry best practices. \nStay informed on emerging cyber threats, attack techniques, and network security technologies. \nWhat You’ll Bring \n3+ years of experience in network security, cybersecurity, network engineering, or a related technical discipline. \nHands-on experience administering or supporting enterprise firewall platforms. \nExperience implementing and troubleshooting firewall policies and security rule changes. \nFamiliarity with security monitoring, log analysis, and threat detection concepts. \nUnderstanding of cybersecurity principles including vulnerability management, incident response, and defense-in-depth strategies. \nStrong analytical, troubleshooting, and problem-solving skills. \nEffective written and verbal communication skills. \nWhat Will Set You Apart \nExperience supporting Palo Alto Networks firewalls. \nExposure to security monitoring and SIEM platforms such as: \nMicrosoft Sentinel \nSplunk \nRapid7 \nCrowdStrike \nKnowledge of Zero Trust architecture and network segmentation best practices. \nExperience working within a Security Operations Center (SOC) or Cyber Security team. \nIndustry certifications such as: \nCompTIA Security+ \nCompTIA Network+ \nPalo Alto PCNSA \nCisco CCNA \nFortinet 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