Led by Ondrej Zima
Senior Systems Engineer & Infrastructure Specialist
Designing and operating secure, scalable IT environments
Proven Infrastructure Experience
20+ years supporting large-scale, multi-site environments
Enterprise Infrastructure Ownership
End-to-end ownership of IT environments supporting 1000+ users across multi-site organisations
Hybrid Identity & Modern Platforms
Active Directory, Entra ID, Microsoft 365 and Intune across secure hybrid environments
Resilience, Security & Operations
Zero-downtime upgrades, disaster recovery and secure infrastructure operations
Experience HIGHLIGHTS
Delivering and operating large-scale infrastructure across multi-site environments, with a focus on reliability, security, and modern platform adoption.
Infrastructure Ownership & Scale
- 1000+ users per site across multi-site environments
- Hyper-V virtualised platforms (10+ production VMs per site)
- Enterprise wireless infrastructure (70+ access points per site)
- Zero-downtime infrastructure upgrades across core systems
- Backup, disaster recovery and resilience strategies
- Secure infrastructure operations across regulated environments
- Active Directory integrated with Entra ID and Microsoft 365
- Intune-managed endpoints and modern device management
- Secure hybrid access and identity governance
- PowerShell automation for compliance, reporting and monitoring
- Process improvements reducing manual operational overhead
- Custom tooling improving visibility and system management
About Ondrej Zima
Senior Systems Engineer with over 25 years of experience delivering and operating large-scale IT infrastructure across education and government environments.
Known for end-to-end infrastructure ownership, operational reliability, and deep expertise across Microsoft platforms, hybrid identity, and enterprise networking.
Combines hands-on technical delivery with long-term infrastructure planning, supporting complex environments where stability, security, and performance are critical.
Trusted by Organisations for Over 20 Years
“We have been using Ondrej Zima for over 15 Years. ... outstanding service, excellent communication and specialised technical support ... ensured all school ICT issues were dealt with promptly.”
“Their reliability and prompt support have taken the frustration out of managing our network.“
“... established and maintained the school network ... The current network that Zima Networks maintains has 231 PC’s and over 1000 users ... sound advice on software solutions, hardware, security and ongoing development. I highly recommend Zima Networks.“
“We have benefited from working with Zima Networks for over two decades ... maintained an exceptionally robust system ... seamlessly upgraded countless times ... provided bespoke solutions for our school’s needs, above and beyond the generic Department of Education provision.”
Professional Enquiries
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