- Designed an infrastructure for hosting of a PHP web application in AWS using Kubernetes (EKS) and Cloudformation;- Introduced and optimized Gitlab CI/CD pipelines for deploying a Drupal application in multiple environments;- Created a custom Docker image of a PHP web application and optimised its build time;- Improved scalability and fault tolerance of K8s pods by implementing Cluster Autoscaler and Horizontal Pod Autoscaler;- Implemented various AWS services - ElastiCache (Memcached), RDS (MariaDB), Elasticsearch, Global Accelerator;- Reduced administration costs by implementing Automation Infrastructure and Provisioning tools (Puppet, Foreman);- Provided an ultimate IT-systems support to a middle-size business (DATEV, QLIK, Ubuntu 18 workplaces, AsteriskTelephony, Backups, LDAP directory, Documents and Rights management);- Managed the monitoring system Checkmk (Nagios) - adding manual checks, additional plugins;- Implemented ELK stack for a logging service;- Migrated XenServer hypervisor to the new server;- Developed a concept of backup strategy, including disaster recovery plan using cloud-based storages;- Implemented a secure WLAN solution for the office building, using Cisco access points;- Managed existed web-site infrastructure with more than 3 million registered users since 1999;- Built an office infrastructure which works without additional costs under the condition of a fully remote Homeoffice.

- Introduced and managed SCCM infrastructure;- Significantly improved workstation administration efficiency with implementing OS Deployment and App Management;- Had a great experience with fixing SCCM issues both on the server- and on the client side;- Implemented and managed SCSM infrastructure. Automated business processes;- Administered Windows Servers 2008-2012 R2: AD, DNS, Hyper-V, Exchange 2013, Lync, SCCM 2012, SCSM 2012 , DPM 2012 R2, WSUS, MS SQL, Sharepoint 2013;- Administered AD-services: editing and creating GPO-objects, creating custom attributes and additional functionality of MMC-console, using Powershell/VBS scripts.

- Administering of Windows Server 2003 - 2008 R2: AD, DNS, DHCP, IIS;- Administering: PBX Panasonic, Exchange Online, firewall software - Kerio Winroute Firewall;- Conclusion of a contracts with ISP, software and hardware providers.