Ragnar Hark Email & Phone Number

Estonia

I am thrilled to share that I've been promoted to Technology Lead position at RmITNow I can focus more on strategy and transformation to DevOps and implementing new technologies.

Tallinn, Harjumaa, Estonia

RMIT's mission is to be the best development partner for its customers, and we also contribute a lot to the development of Estonian e-services and to bringing them to a new and better level.

Tallinn, Harjumaa, Estonia

Responsible of Tele2 Estonia IT Architecture

Estonia

IT architect of data management and analytics department.https://www.tehik.ee/en

Estonia

Responsible of architecture for company internal central IT services like ERP and Finance systems, HR systems, Security systems, Procurement systems, Central document management systems, Internally developed custom software projects and implementing COTS solutions.Leading a Data Govergenance tribe.

Estonia

- Database architecture and administration, - Development of a common Data Model,- Data visualization,- Data life management, - Data compliance (GDPR),- Data Govergenance,- Infrastructure architecture and administration, - Automation,- Planning and sizing.

Estonia

- Database architecture and administration,- Infrastructure architecture and administration,- Automation.

Tallinn

- DevOps, automation,- Infrastructure and database architecture,- Infrastructure and database administration.

Estonia

Infrastructure architecture and operations,DR architecture and management,Backup and recovery architecture and management,SAN and Storage system planning and management,System automation,System virtualization,BigData (Hadoop) platform architecture and management,Hyper-converged (Nutanix) solution POC'ing.

Estonia

- Participating in 24x7 on-call support for technical emergency and business critical issues.- Planning and performing database migrations between different HW platforms and different database engines.- End-to-end managing approximately more than 400 Oracle and MySQL databases located in many data-centers over the world.- Managing end-to-end services monitoring solution using custom scripts and Oracle EM combined with BSM.- Providing support to developers and to internal project teams.- Reviewing and applying SQL scripts and PL/SQL packages created by software developers to production.- Keeping up to date CMDB and documentation.- Process automation using Puppet.- Ad-hoc reports and Ad-hoc maintenance's.- Database backup and recovery.- Business continuity.- Database high availability.- Managing DR sites.- R&D

- Cross-border telecommunication billing system infrastructure architecture and management.- Cross-border telecommunication billing system software architecture and management.- Participating in 24x7 on-call support for technical emergency and business critical issues.- Data warehouse architecture and management.- Database and system administration in many different platforms.- Web server and services administration (IIS, Apache, Tomcat, JBOSS, Weblogic) in many different platforms.- End-to-end system performance tuning.- Storage and SAN architecture and administration.- Backup and recovery solution (DR) architecture and administration.- DR architecture between data-centers. - Capacity planning.- HW maintenance and sizing.- Managing IBM HCMP clusters.- Managing IBM LPAR virtualization.- Unix,Linux,Windows cluster administration.- Oracle RAC, Oracle TimesTen, Oracle RDBMS, Oracle DataGuard, Oracle RMAN, Oracle GridControl, Oracle CloudControl, Oracle AS, Oracle ASM, Oracle Middleware administration.- Participating in system migration and service development projects.- Active Directory administration.- Process automation using BMC ITMS tools. - Citrix cluster administration.- Firewall (Raptor, NetScreen) administration.- SMSC administration.- Business-Objects administration.- SSA, SSL VPN based secure connection administration.- System end-to-end auditing. - Billing application 3 level support.- TL of DB and Sysadmin team.

Company local infosystem development,System administration,Database administration.User training.

Software development,Database architecture and database management (Oracle, MS-SQL)Infrastructure management (AD, MS-Exchange, Novell Netware, Linux, Windows NT)

Software full-stack developer,Software architecture,Infrastructure architecture,Infrastructure management,User training,Project management.

ERP software full-stack developer,Infrastructure architecture,Infrastructure management,Project management,User training

Estonian Defense Forces.ERP software development (accounting system),Managing special radio communication devices.

ERP infosystem analysis and development. (Production planning system, Accounting system)