Endpoint Security Administrator
Apply NowCompany: Mount Indie
Location: Chantilly, VA 20152
Description:
We're expanding our cybersecurity team as part of a high-impact effort supporting the U.S. Air Force through Enterprise IT as a Service (EITaaS) Wave 1. This role focuses on hardening endpoint systems within a secure, classified environment-critical to protecting sensitive systems and information. If you're passionate about policy enforcement, endpoint hardening, and making a difference in national defense infrastructure, we want to hear from you.
What You'll Do:
In this role, you'll lead efforts to define, deploy, and manage endpoint security policies-ensuring compliance and protection across desktops, laptops, and other endpoint devices. You'll work with Active Directory, Group Policy Objects (GPOs), and Local Security Policies to implement best-in-class defense strategies, while collaborating with other security teams to keep our environment resilient.
Key Responsibilities:
Policy Management & Enforcement
Security & Compliance
Testing & Validation
Collaboration & Support
Continuous Improvement
Required:
Preferred:
What You'll Do:
In this role, you'll lead efforts to define, deploy, and manage endpoint security policies-ensuring compliance and protection across desktops, laptops, and other endpoint devices. You'll work with Active Directory, Group Policy Objects (GPOs), and Local Security Policies to implement best-in-class defense strategies, while collaborating with other security teams to keep our environment resilient.
Key Responsibilities:
Policy Management & Enforcement
- Design and maintain GPOs to secure Windows-based endpoints
- Develop and manage Local Security Policies for standalone or non-domain systems
- Regularly review and update policies based on new threats, standards, or system changes
- Troubleshoot GPO conflicts and application issues
Security & Compliance
- Define security baselines for various endpoint types (e.g., workstations, servers, mobile)
- Ensure compliance with internal security policies and external frameworks (NIST, ISO 27001, HIPAA, etc.)
- Conduct audits and generate reports on endpoint security posture
- Support rapid policy changes during security incidents
Testing & Validation
- Test GPO and security policy updates in isolated environments
- Validate changes for compatibility and performance impact
- Document policy implementations, exceptions, and results
Collaboration & Support
- Work closely with IT operations, infrastructure, and cybersecurity teams
- Provide training and guidance on policy management to support staff
- Contribute to cross-team security initiatives and projects
Continuous Improvement
- Stay current on Windows security features and evolving threats
- Recommend improvements to strengthen endpoint defense strategies
- Assist in tuning policies to balance usability and security
Required:
- 10+ years of experience in endpoint security, IT security, or a related cybersecurity role
- Deep experience managing Active Directory and Group Policy
- Strong understanding of Windows security and endpoint protection strategies
- Experience with EDR and antivirus platforms
- Knowledge of network protocols, malware behaviors, and patching tools
- Familiarity with PowerShell scripting for policy automation and reporting
- Clear understanding of compliance frameworks (NIST, PCI-DSS, HIPAA, ISO 27001)
- Excellent troubleshooting and problem-solving abilities
- Strong communication skills for working with both technical and non-technical teams
- Active Secret Clearance
- DoD 8140 compliance - CompTIA Security+ (or equivalent)
Preferred:
- Experience with endpoint security in cloud environments (AWS, Azure)
- Familiarity with SIEM tools like Splunk or LogRhythm
- Knowledge of scripting in Python or Bash
- Experience with vulnerability scanning and management tools
- Certified Endpoint Protection Professional (CEPP)
- Certified Ethical Hacker (CEH)
- GIAC Endpoint Security (GESP)
- Additional security or compliance certifications