Network Administrator

Amentum, a global leader in critical mission support, engineering, technology, and national security solutions, is seeking a Network Administrator to support a government contract based in El Pasto, TX. Purpose and Scope The Network Administrator is responsible for the design, implementation, operation, monitoring, and maintenance of enterprise network infrastructure to ensure reliable, secure, and high-performance connectivity. This role supports day-to-day network operations, troubleshooting, and lifecycle management of network devices and services across LAN, WAN, and wireless environments. A current Cisco Certified Network Associate (CCNA) certification is required to ensure foundational expertise in routing, switching, and network troubleshooting. Primary Responsibilities Network Operations & Support Install, configure, and maintain network hardware including routers, switches, firewalls, wireless access points, and network appliances. Monitor network performance, availability, and capacity; identify and resolve connectivity issues. Perform root‑cause analysis for network outages and performance degradation. Provide Tier II/Tier III support for network‑related incidents and service requests. Configuration & Change Management Manage network configurations, firmware upgrades, and patching activities. Implement approved network changes in accordance with established change‑management procedures. Maintain accurate network diagrams, inventories, and configuration documentation. Security & Reliability Implement and maintain network security controls such as VLANs, ACLs, firewall rules, and network segmentation. Support network hardening, access control, and secure connectivity practices. Monitor for unauthorized access, misconfigurations, and network anomalies. Infrastructure & Projects Support network design and implementation for new sites, expansions, and technology refreshes. Assist with WAN/LAN connectivity, VPNs, and remote access solutions. Coordinate with vendors and service providers for circuit provisioning, maintenance, and troubleshooting. Documentation & Compliance Maintain network documentation including diagrams, IP address management, and configuration standards. Ensure network operations align with organizational IT policies and procedures. Support audits, inspections, and operational reviews as required. Minimum Requirements Two (2) to five (5) years of experience in network administration or network operations. Active Cisco Certified Network Associate (CCNA) certification (required). Hands‑on experience with: Routing and switching (TCP/IP, VLANs, OSPF, basic BGP concepts) LAN/WAN technologies Wireless networking (802.11 standards) Strong troubleshooting skills and understanding of OSI and TCP/IP models. Experience working in enterprise or multi‑site network environments. Must be able to obtain and maintain facility credentials/authorization. US citizenship is required for facility credentials/authorization at this work location. Preferred Qualifications Experience with Cisco enterprise networking equipment. Familiarity with firewall platforms, VPN technologies, and network monitoring tools. Experience supporting cloud‑connected or hybrid network environments. Additional certifications (e.g., CCNP, Network+, or vendor‑specific credentials). Education Bachelor’s degree in Information Technology, Computer Science, or an associated discipline preferred; two (2) years of experience in related field may be substituted for each year of the four (4) years of college. Work, Environment, Physical Demands, and Mental Demands May require on‑call support or after‑hours maintenance windows. Work may involve data centers, network closets, and field locations. Position requires adherence to organizational IT security and operational policies. Other Responsibilities Safety – Amentum enforces a safety culture whereby all employees have the responsibility for continuously developing and maintaining a safe work environment. As appropriate, each employee is responsible for completing all training requirements and fulfilling all self‑aid/buddy aid responsibilities, participating in emergency response tasks and serving on safety committees and teams. Quality – Quality is the foundation for the management of our business and the keystone to our goal of customer satisfaction. It is our policy to consistently provide services that meet customer expectations. Accordingly, each employee must conform to the Amentum Quality Policy and carry out job activities in compliance with applicable Amentum Quality System documents and customer contracts. Each employee must read and understand his/her Quality Management and Customer Satisfaction responsibilities. Procedure Compliance – Each employee must read, understand and implement the general and specific operational, safety, quality and environmental requirements of all plans, procedures and policies pertaining to his/her job. Benefits Overview Health, dental, and vision insurance Paid time off and holidays Retirement benefits (including 401(k) matching) Educational reimbursement Parental leave Employee stock purchase plan Tax‑saving options Disability and life insurance Pet insurance Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low‑income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters. #J-18808-Ljbffr