ADEMOLA ADEYANJU- |-| https://www.linkedin.com/in/oniademola/
PROFESSIONAL SUMMARY
Results-driven Systems Administrator and Endpoint Engineer with 7+ years of experience
managing Active Directory, O365, MDM, and enterprise infrastructure. Proven expertise
in troubleshooting complex systems, scripting automation (PowerShell/Python), and ensuring high
availability for critical services. Adept at security compliance, change management, and leading
cross-functional IT projects in 24/7 environments.
TECHNICAL SKILLS
• Systems Administration: Active Directory, LDAP, Group Policy, File/Print Servers, Exchange,
SharePoint, Citrix
• Cloud & MDM: Microsoft Intune, Azure AD Hybrid, O365, Defender ATP, Conditional Access
• Automation & Scripting: PowerShell, Python, Graph API, Power Automate, WSUS
• Security & Compliance: NIST, Zero Trust, BitLocker, Vulnerability Management, Incident
Response
• Infrastructure: Load Balancing, High Availability, Windows Server, Mobile Device Enrollment
• Soft Skills: Problem-Solving, Mentorship, On-Call Support, Project Leadership
PROFESSIONAL EXPERIENCE
Senior Endpoint Engineer
CloudVanguard IT, | March 2020 – Present
• Active Directory & LDAP Management: Administered hybrid Azure AD environments,
resolved synchronization issues, and optimized Group Policy Objects (GPOs) for 500+
users.
• O365 & SharePoint Administration: Configured permissions, resolved access issues, and
migrated legacy data to SharePoint Online.
• Mobile Device Management (MDM): Deployed and managed 1,200+ devices via Microsoft
Intune, including iOS/Android enrollment and kiosk mode configurations.
• Infrastructure Troubleshooting: Resolved critical incidents related to Exchange, file
servers, and print queues, reducing downtime by 40%.
• Security & Compliance: Enforced BitLocker encryption, Defender ATP policies,
and Conditional Access rules to meet NIST/FINTRAC standards.
• Patch Management: Automated Windows/Linux patching via PowerShell scripts,
reducing deployment cycles from 30 days to 7 days.
• 24/7 Support: Participated in on-call rotations, resolving high-priority tickets within SLA
deadlines.
Endpoint Security Specialist
Paid Inc, | June 2017 – February 2020
• Active Directory & User Management: Managed user provisioning, group policies, and
LDAP authentication for 300+ employees.
• Exchange & O365 Support: Troubleshooted mail flow issues, configured shared
mailboxes, and resolved MFA-related access problems.
• File/Print Server Maintenance: Monitored DFS replication, resolved permission
conflicts, and optimized print server queues.
• Incident Response: Investigated security breaches, performed forensic analysis, and
documented root causes for critical outages.
• Citrix & Remote Access: Assisted in Citrix XenApp deployments and resolved session
connectivity issues.
• End-User Support: Resolved 500+ tickets related to AD, O365, and MDM while mentoring
junior technicians.
EDUCATION & CERTIFICATIONS
• Bachelor of Science, Computer Science | IUKL
• MBA, Business Administration | Cardiff Metropolitan University
• Microsoft Certified: Endpoint Administrator Associate
• ITIL 4 Foundation
• CompTIA Security+
RELEVANT PROJECTS
1. Active Directory & O365 Migration for Healthcare Client
• Challenge: Migrate 200+ users from on-prem AD to Azure AD Hybrid with zero downtime.
• Solution: Automated user provisioning via PowerShell, configured Seamless SSO, and
deployed Conditional Access policies.
• Outcome: Achieved 99.9% uptime, reduced login issues by 50%, and enabled remote
workforce scalability.
2. Enterprise Patch Management Automation
• Challenge: 45-day patch cycles left systems vulnerable to exploits (e.g., CVE-).
• Solution: Built PowerShell scripts to prioritize Critical/High patches and integrated
with Intune/Win32 apps.
• Outcome: Slashed deployment time to 7 days, achieving 100% patch
compliance for Windows/Linux servers.
3. Zero Trust Implementation for Financial Sector
• Challenge: Secure banking workstations against ransomware and unauthorized access.
• Solution: Deployed Intune policies (BIOS-level security, WDAC allowlisting) and MFAenforced Conditional Access.
• Outcome: Blocked 3 breach attempts in Q1 2024 and achieved NIST 800-171 compliance.
