BRYAN CASTLE
Tucson,AZ
Summary
Dynamic IT Specialist with extensive experience at the Department of Veterans Affairs, excelling in endpoint security management and incident response. Proven track record in implementing MDM solutions and enhancing compliance, while fostering cross-functional collaboration. Adept at developing technical documentation and optimizing cloud infrastructure, ensuring robust security and operational efficiency.
Overview
17
17
years of professional experience
Work History
Lead - Endpoint Security
General Services Administration
TUCSON, AZ
04.2024 - Current
- As the Lead - Endpoint Security, I manage endpoint protection by implementing security strategies, overseeing tools, and leading incident response. I work with IT and security teams to ensure compliance and reduce vulnerabilities.
- Delivered secure endpoint solutions for BYOD and government devices, improving protection and compliance across mobile and desktop environments.
- Implemented enterprise-wide endpoint protection using Microsoft Defender, JAMF, Workspace One, ensuring consistent security standards.
- Strengthened cyber resilience with advanced threat detection and monitoring, reducing malware and virus incidents.
- Led incident response for endpoint breaches, performing root cause analysis and applying preventive measures.
- Conducted audits and assessments to ensure endpoint security met federal regulations and internal policies.
- Trained IT teams on endpoint security best practices, increasing compliance with government mandates and ISO standards.
IT Specialist
Department of Veterans Affairs
TUCSON, AZ
07.2021 - 04.2024
- As an IT Specialist, I provided technical support and managed IT systems to ensure smooth daily operations across hardware, software, and network infrastructure. I also assisted in troubleshooting issues, maintaining system security, and implementing technology upgrades to improve overall efficiency.
- Engineered and deployed secure endpoint solutions using VMWare Workspace ONE, Microsoft Intune, and JAMF for enterprise MacOS environments.
- Led development and integration of Microsoft Defender and Azure Virtual Desktop for Mac, enhancing endpoint security and remote accessibility.
- Managed vendor consultations, procurement documentation (ATOs, COs), and compliance to support secure IT operations.
- Standardized MTESE technologies and aligned endpoint security practices with evolving enterprise and federal security requirements.
- Provided Tier 4 support for MDM servers, optimizing mobile and desktop device management across the organization.
- Evaluated new Mac OS architectures and authentication technologies to enhance enterprise security and platform readiness.
IT Specialist
Department of Veterans Affairs
TUCSON, AZ
10.2010 - 07.2021
- As an IT Specialist at the Department of Veterans Affairs, I led the development and support of secure endpoint and mobility solutions across enterprise MacOS environments. I ensured compliance with federal security standards while optimizing system performance, user access, and device management capabilities.
- Engineered and maintained MDM virtual servers (BlackBerry UEM, Outlook365) to ensure reliable Tier 3 support for mobile devices.
- Provided Level 4 support for AirWatch installation and configuration, maintaining system integrity and device management efficiency.
- Configured and managed Mac devices using Absolute, JAMF, and AirWatch, optimizing system performance and security.
- Supported MDM, Azure AD, JAMF, BigFix, and telecom systems, ensuring operational efficiency at national and district levels.
- Improved mobile and EAV policies, enhancing security and compliance across devices and platforms.
- Managed server patching and software installations, adhering to VA security protocols to ensure system integrity.
IT Specialist
Department of Veterans Affairs
TUCSON, AZ
12.2007 - 10.2010
- As an IT Specialist, I provided comprehensive support for enterprise systems, ensuring efficient operation, security, and compliance across hardware, software, and network infrastructure. I managed endpoint security, troubleshooting, and implemented solutions to optimize performance and user experience.
- Developed technical and user documentation, improving system understanding and operational efficiency.
- Resolved connectivity, hardware, software, and OS issues, reducing downtime and enhancing system reliability.
- Installed, configured, and troubleshooted CPUs, printers, and peripherals, ensuring smooth device operation.
- Managed system backups and restorations, ensuring data integrity and recovery of the most recent information.
- Monitored server audit logs and event notices, identifying and addressing potential security issues.
- Provided IT support and training to staff, improving system utilization and troubleshooting efficiency.
Education
Bachelor of science -
Pima Community College
01.2007
Information Technology Certificate - undefined
Tuscon College
01.2008
Skills
- Endpoint Security Management
- System Administration
- MDM (Mobile Device Management) Solutions
- Technical Documentation Development
- Incident Response & Troubleshooting
- Network & Server Administration
- Cloud Infrastructure Management (Azure, AWS)
- Security Compliance & Risk Management
- Vendor Management & Procurement
- Cross-functional Team Collaboration
Accomplishments
- Lead ISO for Mobile Allowlist for eMASS360, 04/01/24, Oversaw security management and compliance of GSA mobile devices.
- Lead FTE for implementing CrowdStrike at GSA, 01/01/24, Spearheaded deployment of advanced endpoint protection solution.
- Lead Architect on transition for JAMF to VMWareWorkSpace ONE UEM, 01/01/21, Designed infrastructure and imaging process for enterprise-wide baseline.
- Lead Architect on transition to MS Defender from McAfee, 01/01/22, Coordinated with Microsoft development team for implementation.
- PIV & Policy, 09/01/23, Resolved access issues for end users accessing VA sites.
- SAM & WAM Program for Covid-19 mobile device usage, 04/01/20, Instituted guidelines for mobile device access during Covid-19.
EXPERTISE AND QUALIFICATIONS
- Subject Matter Expert (SME) - Specialized experience in endpoint security technologies.
- Expertise in Active Directory Federation Services (ADFS).
- Supervisory leadership for security requirements and practices.
- Maintain currency on attack techniques and counter-measures.
- Technical expert in mobile and security endpoint technologies.
Timeline
Lead - Endpoint Security
General Services Administration
04.2024 - Current
IT Specialist
Department of Veterans Affairs
07.2021 - 04.2024
IT Specialist
Department of Veterans Affairs
10.2010 - 07.2021
IT Specialist
Department of Veterans Affairs
12.2007 - 10.2010
Information Technology Certificate - undefined
Tuscon College
Bachelor of science -
Pima Community College
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