NetOps/Linux Administrator with Security Clearance

Role Description: The Network Operations/Linux Administrator is responsible for managing and maintaining both cloud and on-premises networking environments. This includes overseeing virtual private networks (VPNs), cloud-based networks and virtual network appliances, as well as on-premises network infrastructure and hardware. The role ensures the performance, availability, and security of network infrastructure and subscriber connections. The administrator applies strong communication, analytical, and problem-solving skills to identify, communicate, and resolve network issues, maximizing the benefit of IT systems investments.

Key Responsibilities: • Install, configure, and maintain Linux servers and their components to ensure optimal performance, security, and availability.

• Conduct regular system monitoring to verify the integrity and availability of all hardware, server resources, systems, and key processes.
• Administer Linux-based services, including Apache, NGINX, MySQL, and PostgreSQL. Implement and oversee backup and recovery solutions.
• Regularly apply OS patches/upgrades and update administrative tools and utilities.
• Manage accounts and network rights.
• Manage and monitor cloud networking solutions such as AWS VPC and Azure VNet.
• Configure, sustain, and troubleshoot on-premises networking hardware, including routers, switches, firewalls, and load balancers.
• Set up, oversee, and maintain VPNs for secure remote access.
• Monitor network performance and optimize for high availability and reliability.
• Implement and oversee network security measures, including firewalls, IDS/IPS, and network access controls.
• Perform network performance tuning, capacity planning, and scalability assessments.
• Execute network hardware and software upgrades and patches.
• Maintain up-to-date network documentation, including diagrams, configuration guides, and troubleshooting procedures.
• Collaborate with IT teams to integrate and enhance network resources for applications and services.
• Oversee network-related projects from planning through implementation and documentation.
• Research emerging network technologies, trends, and best practices.
• Work independently and collaboratively in a team-oriented environment.
• Be available for on-call after-hours rotational support as necessary.

Qualifications: Clearance Level: Secret with eligibility for upgrade to Top Secret (TS) Education: Hold a Bachelor’s degree in Computer Science, Information Technology, or a related field, or possess equivalent work experience.

Certifications: Candidate must meet DoD 8140 (Formerly 8570) baseline certification at the time of hire. The following are commonly accepted: Security+, CISM, or CISSP. Certifications such as Red Hat Certified System Administrator (RHCSA), Red Hat Certified Engineer (RHCE), or CompTIA Linux+ Experience: • Maintain a minimum of 3-5 years of experience in network engineering.

• Proficiency in Linux operating systems specifically with Red Hat
• Experience with Linux server administration, 1-2 years’ experience.
• Proficiency in cloud networking solutions (e.g., AWS VPC, Azure VNet)
• Experience with on-premises networking hardware (e.g., Cisco, Palo Alto)
• Knowledge of networking protocols and services (TCP/IP, DNS, DHCP, VPN)
• Experience with network monitoring tools (e.g., SolarWinds, Nagios)
• Strong understanding of network security principles and practices
• Experience with Elasticsearch Enterprise and Kibana dashboards
• Excellent troubleshooting, problem-solving, and documentation skills
• Strong verbal and written communication skills Benefits at Sentar: Our unique ownership model attracts top talent, giving employees the freedom to take initiative and drive meaningful improvements. In addition to cultivating a thriving and inclusive work environment, Sentar offers an extensive benefits package designed to support the well-being of employees and their families. Employee ownership is the foundation of our culture, promoting participation, teamwork, and accountability while ensuring long-term financial security and a commitment to excellence.
• Voluntary Medical, Dental, Vision, with Health Savings or Flexible Spending Plan options
• Voluntary Life, Critical Illness, Accident, and Long Term Care insurance options
• Group Term Life, Short-Term and Long-Term Disability is provided by Sentar to all qualifying employees
• Generous 401(k) match
• Competitive PTO plan that graduates quickly with years of service
• Other leave programs; holiday schedule along with bereavement, maternity, jury and military duty
• Mental health awareness programs
• Tuition reimbursement
• Professional development reimbursement
• Recognition and Awards programs