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David Kovalevsky

@davidkovalevsky

Message

Hands-on System Administrator specializing in Windows Server, Microsoft 365, and secure endpoint management.

Israel

Message

What I'm looking for

I’m looking for a System Administrator/IT Systems Engineer role focused on modern workplace and secure endpoint administration, where I can deliver Tier 2/3 support, improve services via documentation, and own Windows Server and Microsoft 365 administration.

I’m a hands-on System Administrator supporting Windows-based client environments across multiple organizations, typically managing 100–500 users and ~5–15 servers per client. I administer Windows Server services such as Active Directory, Group Policy, DNS, DHCP, and Exchange, and I run cloud and endpoint administration through Microsoft 365, Entra ID, Intune, and Azure.

Previously, I led helpdesk support for large-scale operations covering ~15,000 users across Europe and North America, coordinating escalations and service delivery across a team of ~35. I focus on Tier 2/3 troubleshooting, SLA-based prioritization, and improving quality through documentation/knowledge bases, plus security improvements like migrating from ESET to Microsoft Sentinel and from Itarian to Action1.

Experience

Work history, roles, and key accomplishments

Current

System Administrator

Current

Trot

Jan 2025 - Present (1 year 6 months)

Administered Windows Server environments and core services including Active Directory, Group Policy, DNS/DHCP, Exchange, Entra ID, and Microsoft 365 for client environments of ~100–500 users and ~5–15 servers. Provided endpoint/cloud administration via Intune and SCCM, supported virtualization and continuity with VMware/Hyper-V backups and restore checks, and delivered Tier 2/3 troubleshooting wit

Helpdesk Team Leader

Teva (via By One)

Jan 2019 - Apr 2024 (5 years 3 months)

Led helpdesk operations supporting approximately 15,000 users across Europe and North America, coordinating workload, escalations, and service delivery across a team of ~35 people. Oversaw an average service scope of ~600 tickets, created knowledge base/support documentation, and supported customers via phone, email, and remote assistance with fluent English communication.

Escalations Service Delivery Ticket Management Documentation Customer Communications Phone Support Email Support Remote Assistance

Education

Degrees, certifications, and relevant coursework

Naamat Technological College

Practical Engineering Diploma, Telecommunications

2016 - 2018

Completed a Practical Engineering Diploma in Telecommunications, with coursework covering Windows and Unix systems, Microsoft Server 2016, Ubuntu/CentOS, Cisco networking, SQL, Python, and data security practices.