Architecting the Connected Future

About Me

Hello! I am Oscar Sefa Mireku, a Network & Systems Professional and a Cisco Certified Network Associate (CCNA).

I am a results-driven IT professional specializing in the design, deployment, and management of secure enterprise infrastructure. As a graduate of the NBCC IT Network Administration program and a Cisco Certified Network Associate (CCNA), I bridge the gap between complex network engineering and user-focused technical support.

My approach combines a deep understanding of Cisco-based networking with a proficiency in Microsoft 365 and Hybrid Cloud environments. I don't just study technology—I build it. From maintaining a robust physical homelab with enterprise HPE servers to automating tasks with PowerShell, I am constantly refining the skills needed to keep modern businesses connected and secure.

Core Expertise

• Networking: Configuring and troubleshooting Cisco Routers & Switches (VLANs, ACLs, OSPF, STP), and Network Security.
• Systems & Identity: Administering Windows Server, Active Directory (GPOs, DNS, DHCP), and Microsoft Entra ID.
• Cloud & Virtualization: Supporting Microsoft 365/Exchange environments and managing VMware ESXi/Azure hybrid infrastructures.
• Technical Support: Delivering high-tier troubleshooting and service desk excellence with a focus on minimal downtime and user satisfaction.

Why I Do What I Do
Beyond the command line, I am a problem solver at heart. Whether I’m architecting a high-availability domain controller or helping a user navigate a critical system failure, I am driven by technical curiosity and a commitment to reliability. When I’m not at my desk, you’ll likely find me on the road or exploring music—interests that keep my perspective fresh and my creativity fueled.