Kerolos Ashraf

Senior System Administrator with strong hands-on experience supporting enterprise and hybrid Microsoft environments for 5,000+ users across 4 companies. Skilled in Microsoft 365, Entra ID, Azure AD Connect, Exchange Hybrid, Active Directory, virtualization, backup, storage, monitoring, and IT automation. Proven ability to integrate Power Automate with SharePoint, Forms, Excel, Power BI, Azure App Registration, and Microsoft Graph API to automate reporting, licensing, and operational workflows.

Experienced in infrastructure documentation, server deployment, disaster recovery, and SLA-driven support operations.

Senior System Administrator at Mountain View (DMG Holding) (2026-01 – Present)

• Manage and support a hybrid Microsoft environment using Active Directory, Microsoft Entra ID, Azure AD Connect, and Exchange Hybrid.
• Serve and handle daily IT operations for 5,000+ users across 4 companies, ensuring service availability and SLA compliance.
• Administer Microsoft 365 and Office 365 services including user management, license assignment, Exchange operations, shared mailboxes, distribution groups, and admin center tasks.
• Manage Active Directory users, groups, shared accounts, service accounts, Group Policy Objects, and Exchange-related features using ADManager Plus and Microsoft admin portals.
• Create and manage shared folders, file server permissions, NTFS/ACL access, and administrative folder permissions to support business operations.
• Design Power Automate workflows integrated with SharePoint, Microsoft Forms, Excel, Power BI, Outlook, Azure App Registration, Microsoft Graph API, and Microsoft 365 services.
• Automate license usage monitoring and company-based reporting by integrating Power Automate with Graph API, SharePoint, Excel, and Power BI.
• Develop scripts using PowerShell and JavaScript and integrate them with Power Automate to reduce repetitive manual administration.
• Manage Domain Controllers and Additional Domain Controllers, including authentication, replication, policies, and server availability.
• Apply Group Policies for servers, computers, and users to enforce security, configuration, and operational standards.
• Set up Dell servers including iDRAC configuration, RAID controller setup, file server deployment, and storage server preparation.
• Deploy scripts and packages across multiple servers using PDQ Deploy for faster, standardized server administration.
• Monitor servers, services, storage, and network traffic using PRTG, and manage backup and disaster recovery protection using Veeam.
• Act as primary escalation point for endpoint, infrastructure, Microsoft 365, and server-related issues beyond the support team scope.
• Develop and maintain technical documentation for projects, implementations, configurations, troubleshooting procedures, and best practices.

System Administrator at Tayseer Arabian Company (2025-01 – 2026-01)

• Implemented virtualization infrastructure using VMware ESXi and supported production workloads.
• Deployed Windows Domain Controllers to centralize authentication and policy management.
• Designed local datacenter architecture including router, pfSense firewall, Cisco switch, ESXi host, and backup storage.
• Implemented secure file sharing infrastructure with role-based access control using Active Directory.
• Configured pfSense firewall, OpenVPN remote access, and static public IP connectivity.
• Monitored infrastructure health using SolarWinds, including CPU, memory, storage, RAID status, and network traffic.
• Managed endpoint security platforms including Kaspersky Security Center and Symantec Manager.

System Administrator at Premium Card International (2023-10 – 2025-01)

• Administered pfSense firewall including site-to-site VPN, VLAN configuration, QoS policies, and NAT rules.
• Managed VMware vSphere environment including ESXi hosts, vCenter, virtual machines, datastores, and networking.
• Designed infrastructure diagrams for the main data center and branch connectivity.
• Configured and maintained Aruba and HP switches and troubleshot IPsec VPN tunnels on Cisco routers.
• Implemented backup solutions using Veeam, Cobian Backup, and QNAP NAS.
• Installed and configured Zabbix monitoring server on Ubuntu for infrastructure monitoring.
• Developed PowerShell scripts and monitoring automation for Active Directory and infrastructure operations.
• Installed and maintained Windows Server roles including Active Directory, DNS, DHCP, and Domain Controllers.
• Administered SQL Server databases including backup, restore, and performance troubleshooting.

IT Help Desk at Sutherland Global Services (2023-01 – 2023-12)

• Provided multi-level technical support for Windows environments and enterprise applications.
• Diagnosed and resolved hardware, software, and network issues.
• Managed Active Directory users, groups, devices, asset tracking, and ticketing systems.
• Installed operating systems, enterprise applications, and hardware components.

Bachelor of Computer Science in Computer Science – Modern Academy (2020-01)