{"id":3284290,"url":"https://alion.io/job/jmark-network-engineer-iii","title":"Network Engineer III","company":{"id":679090,"name":"JMARK","domain":"jmark.com","url":"https://alion.io/company/jmark-2","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Rippling","truth_index":null},"role":"Networking","role_family":"Networking","seniority":"middle","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Tulsa, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":61000,"max_usd":133000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":206},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"BGP","optional":false},{"name":"OSPF","optional":false},{"name":"TCP/IP","optional":false},{"name":"Wireshark","optional":false}],"status":"live","first_seen_at":"2026-10-26T13:40:28Z","employer_posted_date":"2026-10-26","last_verified_at":"2026-10-30T19:24:21Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"JMARK is a leading provider of managed IT services, cybersecurity solutions, cloud technologies, and strategic IT consulting. Founded on the principle of People First. Technology Second., JMARK partners with businesses to transform technology into a true driver of growth, resilience, and competitive advantage.\nWith a focus on proactive strategies, exceptional customer experience, and business value, JMARK helps organizations reduce risks, increase efficiency, and plan for the future. Our team combines technical expertise with a people-centric approach, ensuring that every solution aligns with client goals, culture, and long-term success.\nAt the heart of JMARK’s philosophy are our core values:\nHonesty - honoring commitments and building trust\nPassion - loving what we do and where we do it\nTeamwork - working together to prevent problems and create solutions\nExcellence - exceeding expectations through initiative and follow-through\nAccountability - doing what we say we will do\nFun - celebrating success and enjoying the journey\nFor more than three decades, JMARK has served as a trusted IT partner across industries, helping businesses thrive with secure, reliable, and future-ready technology solutions.\nTake Your Networking Expertise to the Next Level with JMARK!\nAre you an experienced Network Engineer who enjoys solving complex technical challenges, building secure and reliable networks, and making a real impact on business operations?\nJMARK is looking for a Network Engineer III to join our Tulsa team! In this role, you'll have the opportunity to work primarily with one of our large banking clients, supporting and improving the network infrastructure that keeps their business running.\nThis is an excellent opportunity for someone who enjoys getting hands-on with advanced networking technologies, troubleshooting complex issues, and taking ownership of critical infrastructure in an environment where reliability, security, and performance matter.\nWhile experience working in banking or financial services would certainly be beneficial, previous banking experience is not required. We're more interested in finding a talented engineer who understands complex network environments, takes pride in their work, and enjoys being part of a collaborative team.\nWhat You'll Be Doing\nAs a Network Engineer III, you'll serve as a senior technical resource responsible for maintaining, troubleshooting, securing, and improving complex network environments. You'll work closely with other JMARK engineers, technical teams, and client stakeholders to ensure network infrastructure is performing at its best.\nYour responsibilities will include:\nNetwork Infrastructure Management: Configure, maintain, troubleshoot, and optimize enterprise network environments, including switches, routers, firewalls, VPNs, and other critical networking technologies.\nAdvanced Troubleshooting: Serve as an escalation point for complex network issues, identifying root causes and implementing long-term solutions that improve reliability and performance.\nNetwork Security: Support and maintain secure network infrastructure, including firewalls, intrusion prevention systems, secure remote access, and network security best practices.\nRouting and Switching: Configure and troubleshoot advanced networking technologies, including VLANs, spanning tree, routing protocols, and network segmentation.\nProactive Network Management: Monitor network health, identify potential issues before they become major problems, and recommend improvements to strengthen performance, security, and availability.\nProject Implementation: Participate in network infrastructure projects, including upgrades, deployments, migrations, and technology improvements from planning through implementation.\nDocumentation and Collaboration: Maintain accurate technical documentation, communicate effectively with internal teams and client stakeholders, and ensure service activities are properly recorded.\nTechnical Leadership: Share knowledge, mentor other engineers, and serve as a trusted technical resource when challenging networking issues arise.\nClient Experience: Provide professional, responsive support while translating technical challenges into practical solutions that support business operations.\nCritical Systems Support: Assist with resolving high-priority incidents and participate in an assigned on-call rotation to support business-critical systems.\nWhat We're Looking For\nWe're looking for someone who brings strong technical expertise, excellent troubleshooting abilities, and a proactive approach to managing network infrastructure.\nTechnical Skills and Experience:\nApproximately 3-5 years or more of relevant network engineering experience, or demonstrated equivalent technical expertise.\nAdvanced knowledge of enterprise networking technologies, including LAN, WAN, routing, switching, and network security.\nStrong experience configuring and troubleshooting Cisco networking equipment or comparable enterprise networking technologies.\nExperience with routing protocols such as OSPF, BGP, and EIGRP.\nAdvanced understanding of VLANs, STP, network segmentation, TCP/IP, subnetting, and IPv4/IPv6.\nExperience implementing, administering, and troubleshooting firewalls, VPNs, and secure network connectivity.\nFamiliarity with Cisco ASA, Fortinet, or similar enterprise firewall platforms.\nExperience utilizing network monitoring and troubleshooting tools such as Wireshark, SSH, and other network management platforms.\nUnderstanding of network security principles, access controls, intrusion prevention, and vulnerability mitigation.\nExperience troubleshooting complex network issues in environments where uptime and reliability are critical.\nAbility to document network configurations, technical solutions, and troubleshooting activities clearly and accurately.\nExperience That Would Be a Plus:\nPrevious experience supporting banking, financial services, or other highly regulated industries.\nExperience supporting large, multisite enterprise networks.\nFamiliarity with Cisco Firepower, FMC/FTD, or other next-generation firewall technologies.\nExperience working within a Managed Services Provider (MSP) environment.\nKnowledge of network redundancy, disaster recovery, and business continuity planning.\nCisco certifications such as CCNA or CCNP, or equivalent industry certifications.\nExperience working with network monitoring, security logging, or intrusion prevention technologies.\nBeyond the Technical Skills\nAt JMARK, technical ability is important, but how you approach your work and interact with others matters just as much.\nThe ideal candidate will:\nBe a natural problem solver who enjoys digging into challenging technical issues.\nTake ownership of problems and follow through until they're resolved.\nCommunicate effectively with both technical and nontechnical audiences.\nUnderstand the importance of security, reliability, and attention to detail.\nWork independently while recognizing the value of teamwork and collaboration.\nBe proactive in identifying opportunities to improve systems and processes.\nEnjoy learning new technologies and continually expanding their technical expertise.\nTake pride in delivering an exceptional client 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