Security Engineer

CNI seeking an Endpoint Security Baseline Engineer to support the engineering, implementation, and operational management of enterprise endpoint security configurations across Microsoft Intune, Microsoft Endpoint Configuration Manager (MECM), and Jamf Pro environments. This role is responsible for designing, implementing, validating, and maintaining standardized security baselines that improve the organization's cybersecurity posture while ensuring operational stability across Windows and macOS endpoints.

The ideal candidate possesses experience with Microsoft security technologies, endpoint hardening, compliance policies, CIS and Microsoft Security Baselines, and enterprise endpoint management platforms within highly regulated federal environments.

Chickasaw Nation Industries, Inc. serves as a holding company with multiple subsidiaries engaged in several lines of business (Business Services, Health, Infrastructure and Engineering, Mission Optimization, Technology and Transportation) for the federal government and commercial enterprises. A portion of our profits is used to support Chickasaw citizens. We are proud to support the economic development and long-term viability of the Chickasaw Nation and its people. CNI offers premium benefits eligible on the first day of hire to full time employees; (Medical - Dental – Vision), Company Life Insurance, Short-Term and Long-Term Disability Insurance, 401(K) Immediate Vesting, Professional Development Assistance, Legal Aid Assistance Program, Family Planning / Fertility Assistance, Personal Time Off, and Observance of Federal Holidays.

As a federal contractor, CNI is a drug-free workplace and adheres to the Federal Controlled Substance Act.    

ESSENTIAL REQUIREMENTS  

The ability to obtain, maintain and access classified information at the Public Trust level. 

Strong understanding of cybersecurity frameworks, access control, endpoint security, and incident response. 

• Experience administering Microsoft Intune and Microsoft Endpoint Manager. 
• Experience with MECM/SCCM administration. 
• Experience implementing Microsoft Security Baselines and CIS Benchmarks. 
• Knowledge of Microsoft Defender for Endpoint. 
• Experience configuring BitLocker, Windows Firewall, ASR rules, Device Control, and endpoint protection policies. 
• Familiarity with Entra ID, Conditional Access, RBAC, and device compliance. 
• Understanding of NIST 800-53, Zero Trust Architecture, and federal cybersecurity requirements. 
• Strong PowerShell scripting experience. 
• Excellent troubleshooting and documentation skills. 

Preferred Qualifications

• Experience with Jamf Pro administration. 
• Experience supporting Azure Virtual Desktop environments. 
• Microsoft Intune Administrator Associate (MD-102). 
• Microsoft Security Administrator (SC-300 or equivalent). 
• CISSP, Security+, or similar security certification. 
• Experience supporting HHS, NIH, or other federal agencies. 

ESSENTIAL DUTIES AND RESPONSIBILITIES  

Essential Duties and responsibilities include the following.  Other duties may be assigned. 

• Engineer and maintain Microsoft Intune Security Baselines, Endpoint Security policies, and Configuration Profiles. 
• Develop and maintain Group Policy, MECM Configuration Baselines, and Jamf security configurations. 
• Implement Microsoft Defender for Endpoint security settings, attack surface reduction (ASR) rules, firewall policies, BitLocker, FileVault, Credential Guard, Application Control, and device encryption policies. 
• Configure compliance policies and Conditional Access dependencies supporting Zero Trust initiatives. 
• Validate security baseline deployments through testing, pilot implementations, and production rollout.
• Perform impact assessments for Microsoft monthly security baseline updates and recommend adoption strategies. 
• Collaborate with cybersecurity, RMF, ISSO, and engineering teams to ensure endpoint configurations meet organizational security requirements. 
• Develop configuration documentation, implementation guides, rollback procedures, and standard operating procedures. 
• Support vulnerability remediation initiatives through endpoint configuration changes. 
• Troubleshoot policy conflicts between Intune, MECM, Active Directory Group Policy, and Jamf. 
• Participate in change management, CAB reviews, and production implementation activities. 
• Support enterprise modernization initiatives including Autopilot, cloud-native management, and migration from traditional management solutions. 

EDUCATION AND EXPERIENCE 

• Bachelors degre