Tamer F. Mohammed
Riyadh
Summary
Accomplished IT professional with extensive expertise in Active Directory, VMware vSphere, and cloud platforms such as Azure and GCP. Proficient in advanced administration, security, and patch management, with a strong focus on backup and disaster recovery solutions using Veeam. Demonstrates exceptional skills in SAN/NAS storage management, Windows Server administration, and Exchange Server 2013. Holds CCNA/CCNP certifications in routing and switching, complemented by a solid understanding of SCCM & WSUS for effective vulnerability remediation. Committed to leveraging technical skills to enhance organisational IT infrastructure and security.
Overview
16
16
years of professional experience
4
4
years of post-secondary education
1
1
Certification
Work history
Systems Administrator
Nournet Company
2020.06 - 2026.05
- Provide Tier 3 support for infrastructure, Exchange, and Microsoft 365 services
- Troubleshoot VMware and Hyper-V performance and connectivity issues
- Administer Exchange (Mail-flow, SMTP, Monitoring, Migration)
- Manage Azure AD, Microsoft 365
- Configure Active Directory, GPOs
- Handle AD replication, sites, and domain structure
- Migrate environments to Windows Server 2016/2019 and modern Exchange
- Ensure SLA and KPI compliance
- Follow ITIL standards for Incident, Problem, and Change Management
- Administered VMware clusters and virtual infrastructure
- Implemented backup & disaster recovery solutions
- Managed SAN/NAS storage and performance tuning
Systems Administrator Expert | Infrastructure & Patch Management
NourNet Company
2019.05 - 2021.06
- Enterprise Patching & Vulnerability Remediation: Engineered a zero-downtime patch management lifecycle across on-premises and cloud environments using SCCM, Microsoft WSUS, and ManageEngine Endpoint Central (formerly Desktop Central). Developed robust pre- and post-patching protocols to ensure seamless implementation without business disruption.
- Virtualization & Cloud Infrastructure: Administered and hardened highly available VMware vSphere clusters and Google Cloud (GCP) infrastructure. Leveraged PowerShell/CMD scripting to automate snapshot creation and rollback procedures during host and VM patching cycles.
- Identity, Messaging & SaaS: Managed and secured hybrid Active Directory (AD) environments, on-premises Exchange servers, and Microsoft 365 tenants. Ensured stringent vulnerability remediation, compliance alignment, and secure access controls across all directory and messaging services.
- Risk-Based Prioritization: Assessed and prioritized incoming software patches and CVEs based on risk-to-opportunity ratios. Created and presented recommended patch lists with clear compliance justifications to governance and security teams.
- ITSM & Proactive Monitoring: Orchestrated change management and deployment schedules through ManageEngine ServiceDesk Plus. Monitored core networking routing, bandwidth, and system health via ManageEngine OpManager to proactively detect and resolve anomalies during enterprise-wide rollouts.
- Cross-Functional Coordination: Led collaborative deployment windows with SecOps, network engineering, and infrastructure management teams to remediate vulnerabilities in software and applications exposed to cyberattacks while protecting SLA targets.
- Package Engineering: Developed end-to-end vulnerability remediation processes, overseeing custom application package creation, rigorous staging and testing, and mass deployment for third-party software.
System Engineer
Boudl Hotels & Restores
2018.03 - 2019.05
- User administration, including account setup and maintenance.
- Installation and configuration of Active Directory Domain Services.
- Implementation of security policies for users.
- Performed day-to-day maintenance and installation of servers, network equipment, virtual machines, messaging systems, backups, and storage infrastructure.
- Configured additional roles and features for users as required.
System Administrator
Tarek Al-Areeky & Bro.Co
2016.03 - 2018.02
- Install Active Directory, domain services, roles, and features.
- Provide technical support and expert guidance.
- Manage network servers and technology tools.
- Install and configure Group Policy and Hyper-V.
- Monitor system performance and maintain systems in accordance with requirements.
- Develop backup and disaster recovery policies.
technical support Engineer
Ministry of Health Sudan
2010.10 - 2014.06
- Monitor and maintain computer systems and network infrastructure.
- Install and configure computer systems, network devices, and applications.
- Diagnose and resolve technical issues across hardware, software, and network environments.
- Support and maintain MS Server/Desktops and MS Exchange.
- Ensure security measures are implemented and kept up to date on desktops, laptops, and networked systems.
- Set up and configure new servers, ensuring patches, upgrades, and network-related updates are applied.
Education
B.Sc. - Computer sciences & Network
Omdurman Islamic University
Khartoum, Sudan 2005.07 - 2009.07
Skills
- Active Directory (Advanced Administration, GPO, ADFS)
- VMware vSphere / vCenter (HA, DRS)
- Backup & Disaster Recovery (Veeam, Replication)
- SAN / NAS Storage Management
- Windows Server 2012–2022
- Azure & GCP Cloud
- Security, Patch Management, Monitoring
- Exchange Server 2013
- VMware & Hyper-V
- Basic Email getaway
- SCCM & WSUS
- CCNA/CCNP Routing and Switching
- Microsoft Office 365
- Patch Management
- Vulnerability Remediation
Certification
- Introduction to Hardware & Networking
- CCNA Routing and Switching
- MCSE Server 2012
- Firewall & Introduction to EHCE
- CCNA Security
- CCNA Voice
- CCNP Routing and Switching
- CCNP Security
- Azure Certification
Timeline
Systems Administrator
Nournet Company
2020.06 - 2026.05
Systems Administrator Expert | Infrastructure & Patch Management
NourNet Company
2019.05 - 2021.06
System Engineer
Boudl Hotels & Restores
2018.03 - 2019.05
System Administrator
Tarek Al-Areeky & Bro.Co
2016.03 - 2018.02
technical support Engineer
Ministry of Health Sudan
2010.10 - 2014.06
B.Sc. - Computer sciences & Network
Omdurman Islamic University
2005.07 - 2009.07