Sr. Systems Admin/Security (Windows, Linux, and Networking)

Job Description:

We are seeking an experienced Sr. Systems Administrator with a strong background in Windows and Linux operating systems, comprehensive networking experience, and an active TS/SCI clearance with polygraph. The ideal candidate will be responsible for managing, maintaining, and optimizing our IT infrastructure to ensure maximum performance, security, and availability. This role requires a proactive individual with excellent problem-solving skills and the ability to handle multiple tasks efficiently.

Job Duties & Responsibilities:

• Security:
  • Implement and enforce security policies and procedures within the current IT infrastructure.
  • Conduct regular security audits and vulnerability assessments utilizing tenable
  • Respond to and mitigate system security incidents.

• System Administration:
  • Manage and maintain Windows and Linux servers, and VMware systems.
  • Install, Configure, and troubleshoot operating systems, software, applications and patches across various platforms
  • Monitor system performance, conduct performance tuning, and implementing capacity planning measures.
  • Perform routine system maintenance tasks such as backups software updates and security enhancements.
  • Design, configure, and manage network infrastructure, including routers, switches, firewalls, and VPNs.
  • Collaborate with other IT team members to design and implement network security measures.
  • Diagnose and resolve complex technical issues related to system connectivity and software functionality
  • Respond promptly to system alerts, incidents and service outages.
  • Document troubleshooting procedures and resolutions.

• Network Administration:
  • Ability to troubleshoots network routing issues
  • Ability to administer networking equipment (CISCO, ASA)

• Collaboration and Support:
  • Provide technical support and guidance to internal teams and end-users.
  • Collaborate with developers, engineers, and other stakeholders to support IT-related projects and initiatives.
  • Document system configurations, procedures, and processes for reference and training purposes.

Qualifications:

Bachelor's degree in Computer Science, Information Technology, or a related field (or equivalent experience).

• Minimum of 5 years of experience in systems administration with a focus on Windows and Linux environments.
• knowledge of networking protocols, concepts, and technologies (e.g., TCP/IP, DNS, DHCP, VLANs, VPNs).
• Experience with virtualization technologies such as VMware or Hyper-V.
• Strong understanding of IT security best practices and experience with security tools and frameworks.
• Excellent problem-solving skills and the ability to work independently and as part of a team.
• Strong communication skills, both written and verbal.
• Relevant certification: Security + w CEU's

Preferred Skill and Qualifications:

• Cisco Networking Experience
• Puppet/Ansible
• Scripting Bash/PowerShell/Python

Position Clearance Requirement:

TS/SCI with Polygraph

Please be aware many of our positions require the ability to obtain or maintain a U.S security clearance which requires U.S citizenship.

NS2 Mission is an Affirmative Action/Equal Opportunity Employer. NS2 Mission is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender, gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, characteristic or membership in any other group protected by federal, state or local laws.

By submitting your resume for this position, you understand and agree that NS2 Mission may share your resume, as well as any other related personal information or documentation you provide in your application, with its affiliated companies for the purpose of considering you for other available positions.

NS2 Mission maintains a drug-free workplace and may perform pre-employment substance abuse testing, where required by contract and permitted by law.