Gabriel Stan

Senior Database Administrator | MSSQL & Azure SQL

Salaire / Taux journalier

Malta, Montana 59538, États-Unis

Freelance

Peut venir sur site

Expertises

Microsoft SQL ServerPostgreSQLOracle DatabaseMongoDBDockerLinuxITILSAP ERPSAP HANAETL

Langues

Anglais (Courant)Français (Courant)Allemand

À propos

Introduction

Database Administrator with 20+ years of expertise across MSSQL, Oracle, Azure SQL, PostgreSQL, and MongoDB. Specialized in high-availability solutions (Always On AG, FCI), performance tuning using Query Store and DMVs, and cloud migrations to Azure/AWS. Proven track record in enterprise environments including EU agencies, delivering automated solutions with PowerShell/T-SQL that optimize database performance and reliability for mission-critical systems.

Liens

Expérience de travail

DBA MSSQL Server, Azure SQL DB,Aws MySQL, Postgres SQL,MONGODB

EUAA

mai 2025 - Présent

1 an 6 mois

71140 Maltat, France

– MSSQL installation 2019/2022,migrate older system to newest versions,installing Always On AG,FCI Windows Cluster. Apply CU for MSSQL. – Automate with T-sql jobs and PowerShell script the backup, alerts,deadlocks. – Performance tuning with Query Store, DMV's and extended events. – Administering Reporting Services, upload new reports,control security for all systems. – MSSQl2012/2014/2016/2019/2022,SSMS,Sql Sentry DPA,dbatools. PGAdmin,MySQL workbench, Mongodb on Windows,replicaSET.MongoDB Compass, PostgresSQL,pgAdmin,pg extensions

DBA MSSQL/ORACLE/AZURESQLDB/Azure Flexible MySQL/PostgreSQL

Avacone

mars 2022 - avr. 2025

3 ans 2 mois

50055 Romania, Florence, Italie

– DBA production – Performance tuning with DMV,wait stats methods, Query Store, creating indexes, Brent Ozar stored Procedures and extended events,tuning instance and database parameters.

DBA MSSQL\AZURE\Oracle Production Infra Operations

ECDC

juin 2015 - déc. 2021

6 ans 7 mois

Stockholm, Suède

– Installing and configuring MSSQL instances into a cluster configuration, design HA & DR solutions between data centres using Always ON Availability Groups, mirror, log shipping and replication. – Troubleshooting, support and improve the performance of the MSSQL instances and databases, investigating and improving database and server performance using Profiler, Query Store wait stats and Extended Events methods. – Responsible for the security logins and users, and audit policies. – Migration and upgrade projects MSSQL2008R2 to MSSQ 2012/2014/2016/2019 and Azure SQL Database assessing migration plan with SQL Upgrade Advisor,SQL server Migration Assistant. With Database Migration Service to Azure SQL DB. – Installing, configuring, and administering MSSQL 2014/2016/2019 FCI and Always ON AG on Windows Server 2016 Core using configuration file/unattended installation. for critical mission applications., migrate SQL logins with PowerShell scripts. Dba tools. – Installing and configuring SQL server 2016 R Services,Reporting Services, deploy and upgrade between Report Server 2012/2016 version, security for users, investigating and improve |Report Performance with cache, indexes. – Patch OS windows, installing updates Windows servers, WSFC cluster, applying SP and CU for SQL Server – Deploying Application using Docker – Administering Oracle 12.2 database on Linux,RMAN,Tuning,patching,ASH.,AWR,OEM – Manual Backup\restore databases using T-Sql scripts, Ola Hallengren Solutions implemented.as Backup\Optimization maintenance jobs – DW projects with fact table and SSIS packages in order to load from heterogeneous data sources like Excel,csv and,SQL Server – Automate task with PowerShell scripts – Migrating MSSQL cluster versus new boxes and SAN storage,tempdb local on RAM SSD.

DBA MSSQL L3/4 /Oracle DBA

Novartis

juin 2014 - juin 2015

1 an 1 mois

Prague, Tchéquie

– Writing IQ, SOP and WI for MSSQL 2014. – Upgrade from 2000 version to 2012/2014. – Investigate the database performance and tune with Profiler,DMW's, Extended Events and Waits tats method. – Implementing routines in order automating tasks – Manage TDE databases – Involved in defining the architecture HA,BI or Azure SQL possibilities – Automate the maintenance and optimizations tasks based on Ola Hallogren scripts. – Securing MSSQL with Kerberos, encryption, auditing the logins. – Implementing mirroring and HA Always ON Availability Groups – Support Oracle 11gR2 and 12c pluggable database – RMAN backup

DBA MSSQL

Finance Minister

oct. 2013 - juin 2014

9 mois

Bruxelles, Belgique

– Administering clusters MSSQL 2008R2, troubleshooting and solving performance issues, – Audit MSSQL-SAN performance; refresh test and dev from prod.,backup/restore „troubleshooting SQL issue. – Planned architecture and testing upgrading cluster 2008R2 to Cluster 2012 & AlwaysONAvailibility Groups as DR solution. – SharePoint databases administration, creating scripts to monitor and maintenance tasks. – Training and formation for new DBA Junior, – Health-Check with MS RAAS for cluster side. – Troubleshooting and administering and support RS and Analyses Services upgrades

DBA MSSQ/Oracle for consolidation and virtualization project &SAP implementation

EASA

nov. 2009 - juil. 2013

3 ans 9 mois

Cologne, Allemagne

– Administering MSSQL cluster, consolidation and virtualization project, and SAP and SharePoint farm implementation under MSSQL 2005/2008/2012. – Creating maintenance monitoring jobs with PowerShell, security for logins and users, solving performance issues using Profiler, traces, DMV has, extended events, wait stats or query hints. – Responsible for backup-restore policy. Creating backup jobs, alerts related to jobs. – New MSSQL 2008/R2/2012 installations, tools apply the Service Packs and patches. – Creating databases, importing databases, improving database performance with indexes and trace flags. Monitor CPU,I/O and RAM for instances and setup baseline for them. – Creating SSIS packages to import from heterogeneous sources like Fox Pro, Sybase ASA – Create database links for MSSQL, ODBC connections, linked servers to Oracle, MSSQL – Planned, Implemented, configuring and troubleshooting HA & DR site through and AlwaysONCluster and Availability Groups on Windows2012 Server. – Monitoring and obtaining reports on MSSQL instances with SCOM 2012. – Setup MSSQL Mail for sending reports and messages, implementing security audit, – Work closely with Wintel admin for AD groups and security issues. – Requested database refreshes from prod to Test & Dev. – Creating Reports with SSRS and BI stack. – Migration Oracle 9i to MSSQL 2008,Migration Access to MSSQL 2008R2 – Administration Oracle 11gR2 on Linux/Windows servers,RMAN,clone db's

DBA MSSQL/ORACLE

ING Bank

nov. 2008 - sept. 2009

11 mois

Amsterdam, Pays-Bas

– Working with test & acceptance environments for acceptance of the new servers to respect the ING standards in terms of security AD integration, monitoring and backup. – Audit performance of the MSSQL and increase performance with indexes, statistics instances and hints. – implementing best practices security ING – Installing and configuring MSSQL 2005/2008 new systems – Backup scripts for TSM backup solution – Administering Oracle 9i/10g AIX

Team Leader DBA Sybase

Relational Technology

juil. 2007 - nov. 2008

1 an 5 mois

Bucarest, Roumanie

– Working as Team Leader for the Sybase official partner in Romania.. – Leading, recruiting, training and motivating 4 people composed technical department. – Involved in administering, marketing strategy targeting the market from their IT Budget's. – Involving in pre-sales and sales operations. – Conducted POC demos. – Installing and configuring ASE 12.5, IQ and Replication Server under Windows, Linux and AIX. – Using MDA tables and sp_sysmon for monitoring, creating new indexes resulting significant performance improvements. – Creating shell scripts for dumping database and logs, rebuild indexes. – Developing mapplets with Informatica Power Centre and develop reports with BOXI – Transfer into Sybase IQ with Informatica Power Centre from MSSQL and Oracle – SAP HANA

DBA Remote Sybase contract

IBM

juil. 2006 - juil. 2007

1 an 1 mois

À distance

– Remote DBA Sybase for Swiss Re based London. – Daily admin tasks for dump-load, tuning databases and servers.

DBA MSSQL/Oracle

ROMPETROL SA

août 2004 - juil. 2006

2 ans

Bucarest, Roumanie

– Installation, maintenance, management, planning architecture, migration/upgrade of prod and dev SQL Server 2000 / SQL Server 2005 databases(sizes up to 130Gb), MSSQL Clusters,Oracle 9i & 10g – SQL Server Monitoring – daily use of Quest Software for troubleshooting on 40 Database.

DBA MSSQL

SMARTREE INC

nov. 2003 - juil. 2004

9 mois

Bucarest, Roumanie

– Installation, maintenance, management, planning architecture, migration/upgrade of prod and dev SQL Server 2000 databases – Propose design and modelling for databases and tables. – SQL Server Monitoring/Alerting daily using using T-sql scripts. – T-SQL optimization, scripts, stored procedures, functions and triggers. – Project Data Warehouse, modelling a Data Warehouse,create the cubes,develop stored procedures to transfer dates from production to DW.. – Performance tuning and optimization of SQL Servers, applications, Indexes, and – T-SQL. Tools used include Performance Monitor, Profiler, Query Execution Plans, stored procedures and resulting significant performance improvements. – Working close with developers to improve the performance of new software applications – Data Migration/ETL/Data cleansing – SQL scripts and DTS packages to migrate, cleanse and transform data between DTS Packages – designing for data import and export. – Security - Set and enforced standards create users and roles etc. – Administering Windows 2000/2003 servers with AD.

DBA MSSQL

COMPUTER SCIENCES CORPORATION

mars 2003 - juil. 2003

5 mois

Montréal, QC, Canada

– Installation, maintenance, et administration of prod and dev SQL Server 2000 / SQL Server 7 databases (sizes up to 100GB). Clusters.

Consultant MSSQL/Windows

Mirix

sept. 2001 - juin 2002

10 mois

Paris, France

– Audit MSSQL servers to improve the architecture and performance.. – Mission to replace DBA for a short period.

Sysadmin & DBA MSSQL

Tiami Ltd

févr. 2000 - août 2001

1 an 7 mois

Craiova, Roumanie

– Installing and adminstering.Windows NT/2000 server, installing and configuring MSSQL 6.5/7. – Implementing Backup-Restore plan with T-SQL job and Agent Jobs.. – Modelling databases,creating the databases,tables, views and indexes – Optimize the performance of the queries with DBCC,trace flags, SQL Trace/Profiler – Migrating Access database to MSSQL 2000


Formation

Polytechnic University Bucharest

Bachelor's Degree, Industrial Technology, Administration, Economics, Conventional and Non-Conventional Technology, Physics, Chemistry

Economics Bucharest

Bachelor's Degree, Maths, English Language and French, Statistics, Economics, Mondial Market, Account


Licences et certifications

SYBASE DBA

Délivré le : –

Certifié par Sybase

ORACLE 9 & 10 OCP DBA

Délivré le : –

Certifié par Oracle

MCSD

Délivré le : –

Certifié par Microsoft

MCSA

Délivré le : –

Certifié par Microsoft

Sybase ASE

Délivré le : –

Certifié par Sybase

PostgresSQL 17

Délivré le : –

MSSQL DBA 2008

Délivré le : –

Certifié par Brainbench

OCP 9i DBA

Délivré le : –

Certifié par Oracle

OCP 10g DBA

Délivré le : –

Certifié par Oracle

AZ900

Délivré le : –

Certifié par Microsoft

Azure DP300

Délivré le : –

Certifié par Microsoft

AZURE DBA DP900

Délivré le : –

Certifié par Microsoft

MCTS MSSQL 2008

Délivré le : –

Certifié par Microsoft

MCTIP MSSQL 2008/2012/2019/2022

Délivré le : –

Certifié par Microsoft

MCDBA

Délivré le : janv. 2001

Certifié par Microsoft

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