Senior Systems Administrator

• Deploy and administer Windows and Linux (RHEL, Debian, Ubuntu) servers, both physical and virtual, ensuring reliability, availability, and security.
• Deploy and administer Azure cloud resources, ensuring reliability, availability, and security.
• Configure and deploy SSL decryption, PKI certificates, MFA, and hardware tokens, following best security practices.
• Implement security measures and controls to protect networks and systems against unauthorized access and cyber threats, ensuring compliance with NIST and DISA standards for CMMC.
• Collaborate with IT team members to maintain, regularly update, and test backup and disaster recovery plans, ensuring data integrity and business continuity.

Other Job Functions:

• Maintain servers, endpoints, and networks; collaborate with IT team members to deploy updates and patches.
• Monitor system logs and network activity to identify and address security vulnerabilities or incidents.
• Install, configure, and maintain operating systems, hardware, and software applications.
• Monitor system performance, network traffic, and server availability to ensure optimal operation.
• Perform routine system updates, patches, and security fixes.
• Create and update technical documentation, including system configurations, procedures, and user guides.
• Generate reports on system performance, security status, and incident responses.
• Collaborate with IT and other departments to implement new technologies and solutions.

The ideal candidate will have a strong understanding and experience with DoD compliance standards such as STIG, NIST, DISA, and CMMC, as well as expertise in modifying, troubleshooting, and performing major repairs on network hardware and software components, including Windows and Linux servers, routers, switches, access points, and other IT equipment. The selected candidate will be subject to government security investigations and must meet eligibility requirements for access to classified information., * Bachelor’s degree in Information Technology, Computer Science, or related field.

• Relevant certifications such as CompTIA A+, Network+, Security+, Microsoft Certified Administrator, Cisco Certified Network Associate (CCNA), etc., are a plus.
• Active DoD Security Clearance is a plus.
• 8 years’ experience administrating Active Directory, Group Policy, Radius, Network Policy Server, Identity Management, and Certificate Services.
• 8 years’ experience managing and administrating Windows systems, both physical and virtual, in a domain environment.
• 5 years’ experience managing and administrating Linux systems, both physical and virtual, in a domain environment.
• Proficient with VMWare/ESXI, HCI Hyper-V, or other hypervisors.
• 5 years’ experience managing and administrating Office 365 and SharePoint 365.
• 3 years’ experience with Microsoft Azure.
• Ability to comprehend complex verbal and written instructions; communicate effectively, both orally and in writing.
• Display a keen interest in IT-related work and a desire to learn and grow.

Candidate Must Possess the Ability to:

• Multi-task, keep records, prepare reports, and follow specific instructions.
• Train and instruct employees in proper use of computers/network system functions and resources.
• Effectively carry out difficult and complex tasks while exercising independent judgment and initiative.
• Perform other duties as required., * A requirement of this job is that you obtain and maintain a security clearance, and you must be a U.S. citizen. Are you a U.S. citizen?
• Are you a Dual Citizen?

Experience:

• Microsoft Azure: 3 years (Preferred)
• managing and administrating Windows systems: 8 years (Preferred)
• Linux servers: 5 years (Preferred)
• SSL decryption: 5 years (Preferred)

License/Certification:

• CompTIA A+ (Preferred)
• CCNA (Preferred)

Security clearance:

• Top Secret (Preferred)

Pulled from the full job description

• Referral program
• Parental leave
• 401(k)
• Health insurance
• Retirement plan
• 401(k) matching
• Paid time off, * 401(k)
• 401(k) matching
• Dental insurance
• Flexible schedule
• Health insurance
• Health savings account
• Life insurance
• Paid time off
• Parental leave
• Referral program
• Retirement plan
• Vision insurance

Crescent Systems Inc., (CSI) - a custom hardware/software engineering company headquartered in Richardson, TX, is seeking a talented IT Sr. Systems Administrator. The Sr Systems Administrator is responsible for the effective operation, management, and maintenance of an organization’s IT infrastructure. This role involves ensuring the stability, security, and performance of all systems, servers, networks, physical infrastructure, cloud infrastructure, and software applications. The Sr. Systems Administrator collaborates with various teams to troubleshoot issues, implement solutions, and proactively manage the technology environment. Additionally, the Sr. Systems Administrator acts as a point of escalation for the helpdesk., Crescent Systems, Inc. (CSI) is a leading aerospace technology firm that designs, develops, implements, tests, deploys, and sustains reliable and rugged electrical, software, and hardware systems solutions for complex problems in the aerospace industry. Our integrated solutions teams focus on delivering high-performance products and services to meet our clients’ needs. Our core values of ethics, quality, and community guide every conversation, decision, and interaction.

Why Work for CSI?

At CSI, we have cultivated a company culture that revolves around community and collaboration. We believe in fostering a supportive and inclusive work environment where employees are encouraged to thrive both personally and professionally. As an organization, we value excellence in every aspect of our business, from our products and services to our relationships with customers. Meeting company goals and fulfilling commitments is not just a priority but a source of pride, ensuring exceptional customer satisfaction.

If you’re seeking to be part of a company that upholds strong values of ethics, quality, and community, then join us at CSI. We are always looking for dedicated individuals who share our vision and are ready to contribute their skills and expertise to our dynamic team.