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Marios PavlidisPrincipal DBA

Curriculum Vitae

Marios Pavlidis — Principal Database Administrator & Database Solutions Lead

Professional Summary

Principal Database Administrator and Database Solutions Lead with extensive experience designing, operating, and evolving enterprise database platforms. Deep technical expertise across Oracle (RAC, Data Guard, RMAN), Microsoft SQL Server (Always On, FCI), PostgreSQL, and MongoDB. Track record in high availability architecture, disaster recovery, performance engineering, cloud migration, security, and DBA team leadership. Based in Athens, Greece, available for consulting and advisory engagements.

Core Competencies

Oracle RAC & Data Guard
SQL Server Always On AG
PostgreSQL replication & performance
MongoDB administration & sharding
High availability architecture
Disaster recovery & failover testing
Performance tuning & query optimisation
Cloud database services (OCI, Azure)
Database security & compliance
Migration & modernisation
DBA team leadership
Operational automation

Experience

Principal Database Administrator

Sep 2021 – Present

Netcompany

  • Design, deploy, and operate enterprise database platforms — Oracle, SQL Server, PostgreSQL, MySQL — for clients across financial services, telecoms, and insurance, hosted on-premises, on Azure, and on OCI.
  • Architect and deliver HA/DR solutions: Oracle RAC and Data Guard; SQL Server FCI, Availability Groups, and Log Shipping; MySQL InnoDB Cluster and Galera Cluster; MongoDB Replica Sets and Sharding.
  • Lead a multi-level DBA team across concurrent engagements, from entry-level engineers to principals.
  • Key clients: Cosmote, Vodafone, Munich RE HealthTech, ERGO, Piraeus Bank, National Bank of Greece, Pancretan Bank, Cepal, HEDNO, IPTO.

Instructor (concurrent)

May 2019 – Present

Agile Actors

  • On-demand MongoDB training: Introduction to MongoDB for Developers and Introduction to MongoDB for DBAs.

Database Administrator

May 2019 – Sep 2021

DIAS Interbanking Systems

  • Administered SQL Server and Oracle environments across multiple deployment tiers; designed backup, HA, and DR architecture.
  • Performance-tuned a high-throughput interbank payments platform at both server and query level.

Database Administrator

Mar 2014 – May 2019

Cosmote (OTE Group)

  • Administered Oracle, SQL Server, Teradata, MySQL, PostgreSQL, and MongoDB across large-scale enterprise environments — lifecycle ownership from installation through decommission, including performance tuning.
  • Designed HA/DR for Oracle (Data Guard, RAC), SQL Server (FCI, AG, Log Shipping), and MongoDB (Replica Sets).
  • Implemented database security controls: encryption, auditing, user and role management.
  • Backup strategy design, on-demand recovery, custom monitoring via Enterprise Manager and scripts; incident, problem, and change management; 24×7 on-call support.

Application Support Engineer

Oct 2008 – Mar 2014

Cosmote SA

  • Supported Order Management and Billing systems: Siebel CRM, Ericsson BSCS, CompTel Event Link, and custom WebLogic-based applications.
  • Incident, problem, and release management; batch scheduling via Bash and Orsyp Dollar Universe.
  • Built a centralised alarm mechanism and a real-time operational dashboard (SharePoint 2007), developed in collaboration with end users and application developers.

Application Administrator

Aug 2007 – Oct 2008

Vivodi Telecom SA

  • Liaison between Customer Care and IT; 1st-level application and user support; requirements analysis for an in-house CRM application.

Certifications

View with badges →

Active

Oracle AI Vector Search Certified Professional
Oracle · Issued Mar 2026
Active
Oracle Cloud Database Services 2025 Certified Professional
Oracle · Issued Aug 2025 · Expires Aug 2027
Active
Oracle Data Platform 2025 Certified Foundations Associate
Oracle · Issued Aug 2025 · Expires Aug 2027
Active
Oracle Cloud Infrastructure 2025 Certified Foundations Associate
Oracle · Issued Jul 2025 · Expires Jul 2027
Active
MySQL Implementation Certified Associate
Oracle · Issued Jun 2025
Active
Oracle Cloud Database 2024 Migration Certified Professional
Oracle · Issued Dec 2024 · Expires Dec 2026
Active
Oracle Database Administration 2019 Certified Professional
Oracle · Issued Sep 2024
Active
MongoDB Associate Database Administrator
MongoDB · Issued May 2024
Active
Oracle APEX Cloud Developer Professional
Oracle · Issued Dec 2023
Active
WeLead Leadership Accelerator Programme
TAOLIN · Issued Dec 2023
Active
MCSE: Data Management and Analytics
Microsoft · Issued Mar 2019
Active
Exam 767: Implementing a Data Warehouse
Microsoft · Issued Mar 2019
Active
MCSA: SQL 2016 Database Administration
Microsoft · Issued Jul 2018
Active
Exam 765: Provisioning SQL Databases
Microsoft · Issued Jul 2018
Active
Microsoft Certified Professional
Microsoft · Issued May 2018
Active
Exam 764: Administering a Microsoft SQL Database Infrastructure
Microsoft · Issued May 2018
Active
Oracle Database Cloud Administrator Certified Associate
Oracle · Issued Feb 2018
Active
Oracle Database 12c Administrator Certified Associate
Oracle · Issued Dec 2017
Active
ITIL® Service Offerings and Agreement
EXIN · Issued Oct 2016
Active
ITIL® Foundation Certificate in IT Service Management
EXIN · Issued Mar 2016
Active
Test of English for International Communication (TOEIC)
ETS · Issued Oct 2010
Active
General Certificate of Education Examination
University of London · Issued Jun 1997
Active

Expired

Oracle Cloud Infrastructure 2023 Certified Foundations Associate
Oracle · Issued Oct 2023 · Expired Oct 2025
Expired
Oracle Cloud Data Management 2023 Certified Foundations Associate
Oracle · Issued Aug 2023 · Expired Aug 2025
Expired
Microsoft Certified: Azure Database Administrator Associate
Microsoft · Issued Jan 2022 · Expired Jan 2026
Expired
Oracle Autonomous Database Cloud 2021 Specialist
Oracle · Issued Oct 2021 · Expired Oct 2023
Expired

Education

Education details will be listed here.

A downloadable PDF version of the CV is available on request via thecontact page.