Systems Administrator III/IV

Description:: Sys Admin team member supporting cyber range network operations and mission execution. The position

requires candidates to have excellent communication, analytical, and problem-solving skills to help identify, communicate, and

resolve issues. The person will work in a dynamic team environment, interface with clients and Circadence staff. This is a permanent

full-time position working on-site at Huntsville at Redstone Arsenal activity. TS/SCI security clearance required.

• Systems Administrator will work directly with ISSOs by performing the key objectives noted below:

o System Security Configuration and Hardening:

 Implement and maintain secure configurations for operating systems, applications, and network devices

based on security standards (e.g., NIST, RMF, etc.)

 Apply patches, updates, and security fixes to mitigate vulnerabilities for local and distributed systems.

 Access Control and Identity Management:

 Manage user accounts, permissions, and roles to enforce the principle of least privilege.

 Configure and monitor authentication mechanisms (e.g., MFA, SSO) in coordination with ISSOs.

 Regularly review access logs and revoke unnecessary privileges with Security oversight.

o Monitoring and Incident Response:

 Deploy and manage security tools like intrusion detection/prevention systems (IDS/IPS), antivirus, and

SIEM solutions for Security staff.

 Monitor system logs and alerts for suspicious activities and report findings to ISSOs.

 Assist in incident response by isolating affected systems, collecting forensic data, and implementing

remediation steps under ISSO guidance.

 Vulnerability Management:

 Prioritize and remediate identified vulnerabilities in collaboration with ISSOs.

 Document and report remediation efforts to ensure compliance with security policies.

o Compliance and Policy Enforcement:

 Ensure systems adhere to organizational security policies and regulatory requirements (e.g., NIST, RMF,

etc.)

 Support ISSOs in audits by providing system documentation, logs, and evidence of compliance.

 Implement security controls aligned with frameworks like NIST 800-53 or RMF.

o Backup and Disaster Recovery:

 Maintain secure and encrypted backups to ensure data integrity and availability.

 Test disaster recovery plans to minimize downtime during security incidents.

 Coordinate with ISSOs to ensure backup processes meet security requirements.

o Network and Endpoint Security:

 Implement and assist with configuration of endpoint protection tools to secure system boundaries.

 Monitor systems for anomalies and report unauthorized access attempts.

 Collaborate with ISSOs to align network and system security measures with organizational standards.

Required Skills/Experience

• Active Directory Domain Administrator – Manage and maintain: Sites and Services, DNS, DHCP, Group Policy Objects,

Computer/User Objects, LDAP, Authentication protocols, AD Permission delegation using the least privilege methodology,

Dynamic/Static AD groups, as well as other Domain services in accordance with MS best practices and compliance.

• Cisco CCNA level networking

• Experience supporting system Authority to Operate (ATO) by adhering to the Risk Management Framework (RMF) process

to integrate security controls, privacy, and cyber supply chain risk management for cyber infrastructure.

• Validate Security controls are functioning as intended in accordance with NIST 800-x and RMF compliance requirements.

• Experience working with NTFS permissions and DFS name spaces for file sharing.

• Experience with current versions of Windows (e.g. Server 2016, 2019, 2022, Windows 10 & 11 Enterprise)

• Experience with administering MS Exchange (2016, 2019) on premise servers.

• Experience with current versions of RHEL (8, 9).

• Experience with designing and managing Hyper-V clusters.

• Experience with managing SQL Instances and Databases.

• Experience troubleshooting and remediating issues by reviewing system logs, etc.

• Experience with PKI and SSO implementation/infrastructure

• Experience with PowerShell, Python and/or other scripting languages.

• Experience with patch management technologies (e.g. SCCM/MECM, WSUS, Scripting, etc.)

• Experience with Vulnerability scanners such as Nessus.

• Experience with automated STIG check technologies such as SCAP scans and Evaluate-STIG.

• Experience with data backup and restore, such as Veeam Backup and Replication.

• Experience with VMware technologies.

• Experience with Ansible and automation is a plus.

• Experience with Atlassian Suite a plus (JIRA, Confluence, Bitbucket, Crowd).

• CompTIA Security + Certification required.

• Must be located near Dam Neck, VA or be willing to relocate.

• US Citizen/US Resident required with active TS security clearance.

Compensation: $110,000 - $135,000 Circadence is proud to offer medical, vision, and dental insurance, 401(k) plan with company

matching, life and accidental death and dismemberment insurance, HSA (with high deductible plan), FSA, critical illness and accident

insurance to all full-time employees, along with generous paid time off and holidays.

In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to

complete the required employment eligibility verification form upon hire

Circadence Corporation is proud to be an equal opportunity employer. We will not discriminate against any applicant or employee on the basis of age, race, color, creed, religion, sex, sexual orientation, gender, gender identity or expression, medical condition, national origin, ancestry, citizenship, marital status or civil partnership/union status, physical or mental disability, pregnancy, childbirth, genetic information, military and veteran status, or any other basis prohibited by applicable federal, state or local law.

Circadence will consider for employment qualified applicants with criminal histories in a manner consistent with local and federal requirements.

All Circadence employees are expected to actively support diversity on their teams, and in the Company.

NOTICE: Applicants selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information.