The person behind MASK FABRIC
Samuel Gbli Tetteh
IT security and systems analyst. Microsoft cloud, identity, Zero Trust and network security. Researcher in cybersecurity and AI.
Chicago, Illinois, United States
Why MASK FABRIC
Samuel has spent his career securing networks and data, from Ghana's national power grid to Microsoft cloud environments for healthcare, finance and retail organisations. He built MASK FABRIC around one idea: people should get the power of AI without giving up control of their data.
Summary
Strategic IT security and systems analyst who designs, secures and manages complex IT infrastructure in fast-paced managed-service environments. Expert in Microsoft networks (Active Directory, Entra ID, Azure), VMware vSphere and enterprise storage. Architects Zero Trust security, builds and tests disaster recovery, and aligns organisations with HIPAA and PCI DSS, combining deep technical work with client consulting and automation.
Expertise
- Microsoft and cloud
- Entra ID, Azure, Exchange, Purview, Defender, Intune, Conditional Access
- Security and compliance
- Splunk SIEM, Nessus, Tenable, SentinelOne, Microsoft Defender, Zscaler; HIPAA, PCI DSS, SOX
- Identity and access
- Least privilege, IAM governance, SSO, MFA
- Virtualization
- VMware vSphere (ESXi, vCenter, HA), Hyper-V, Azure Virtual Desktop
- Storage and backup
- SAN/NAS (Dell EMC, NetApp), RAID, Veeam, disaster recovery
- Networks
- OSPF, BGP, VLANs, SonicWall, Fortinet, Meraki, IDS/IPS
- Automation
- PowerShell, shell scripting, Kaseya VSA 9
- IT operations
- ServiceNow, AutoTask, documentation, capacity planning
Experience
Systems Analyst and Technical Consulting
Mar 2025 to present · Chicago, Illinois
- Hardens Microsoft environments for healthcare, finance, manufacturing and retail clients: identity, access and compliance across Entra ID, Azure, Exchange, Purview and Defender.
- Conditional Access policies that block hundreds of suspicious sign-ins every month; secure tenant migrations and SSO.
- 99.99% data availability on multi-tenant SAN/NAS storage with Veeam, meeting recovery objectives; immutable, encrypted backups against ransomware.
- 100% compliance with critical security updates through Kaseya VSA 9 patch policies; automation that fixes failures before users notice.
- Cut client-reported downtime by 35% with standard troubleshooting workflows and documentation.
- Security awareness training with simulated phishing, with measurably fewer failures.
Help Desk Analyst · Clear Spring Health, Group 1001
Jun 2024 to Mar 2025 · Chicago, Illinois
- Resolved 25% more issues than any other help desk team member.
- Active Directory and Entra identity administration; ServiceNow incidents and changes; stronger access controls from access-log analysis.
Student Grader · DePaul University
Sep 2023 to Nov 2024 · Chicago, Illinois
- Assessed undergraduate coursework with consistent methods and detailed feedback.
Network Engineer · Ghana Grid Company (GRIDCo)
Dec 2008 to Sep 2022 · Ghana
- Network security for Ghana’s national power grid; improved network security posture by 30% through traffic and log monitoring.
- Network audits, vulnerability assessments and remediation; compliance for critical systems; the case for MFA.
Research
15 publications on cybersecurity, AI, machine learning and software engineering; 131 citations.
Empirical study of agile software development methodologies: a comparative analysis
Asian Journal of Research in Computer Science, 2024
A systematic performance review of security methods for the cyberworld
Asian Journal of Research in Computer Science, 2024
Systematic review and analysis of cost-saving mechanisms, challenges and best practices in a serverless computing environment
Journal of Propulsion Technology, 2024
Artificial intelligence in healthcare: a systematic review of virtual healthcare assistants
Asian Journal of Probability and Statistics, 2025
Software testing techniques and levels in software development
ESP International Journal of Advancements in Computational Technology, 2024
Engineering Ghana’s future: the impact of emerging technologies and digital transformation
Journal of Engineering Research and Reports, 2025
Education
- DePaul University, Chicago
Master of Science in Cybersecurity - University of Education, Winneba, Ghana
Bachelor of Science in Information Technology - University of Energy and Natural Resources, Sunyani, Ghana
Master of Science in Computer Science
Certifications
- CompTIA Cloud+, Security+, Server+, Network+
- CompTIA Network Infrastructure Professional (CNIP)
- CompTIA Secure Cloud Professional (CSCP)
- AWS Certified Cloud Practitioner
- Communication Networks, ABB University (Switzerland)
- ICT Engineering, Korea Electric Power Corporation (KEPCO)