Adrian Hollay - Interim Consultant for Oracle Database Migrations to the AWS Cloud

Q: Where is Adrian based?

Adrian is based in Wedel, Germany .

Q: What languages does Adrian speak?

Adrian speaks the following languages: Slovak (Native), German (Advanced), English (Advanced) .

Q: How many years of experience does Adrian have?

Adrian has at least 24 years of experience. During this time, Adrian has worked in at least 19 different roles and for 21 different companies . The average length of individual experience is 1 year and 2 months . Note that Adrian may not have shared all experience and actually has more experience.

Q: What is Adrian's latest experience?

Adrian's most recent position is Interim Consultant for Oracle Database Migrations to the AWS Cloud at Bank Deutsches Kraftfahrzeuggewerbe GmbH .

Q: What companies has Adrian worked for in recent years?

In recent years, Adrian has worked for Bank Deutsches Kraftfahrzeuggewerbe GmbH and DERMALOG Identification Systems GmbH .

Q: Which industries is Adrian most experienced in?

Adrian is most experienced in industries like Information Technology (IT) , Banking and Finance , and Government and Public Administration . Adrian also has some experience in Transportation and Logistics , Insurance , and Healthcare .

Q: Which business areas is Adrian most experienced in?

Adrian is most experienced in business areas like Information Technology (IT) , Operations , and Project Management . Adrian also has some experience in Product Development , Quality Assurance (QA) , and Business Intelligence .

Q: Which industries has Adrian worked in recently?

Adrian has recently worked in industries like Information Technology (IT) and Banking and Finance .

Q: Which business areas has Adrian worked in recently?

Adrian has recently worked in business areas like Information Technology (IT) .

Recommended expert

Wedel, Germany

Experience

Nov 2021 - Present

4 years 4 months

Interim Consultant for Oracle Database Migrations to the AWS Cloud

Bank Deutsches Kraftfahrzeuggewerbe GmbH

Migration of Oracle databases from on-premise to the AWS Cloud
Support for technical Oracle solutions and cloud database infrastructures (IaaS and PaaS) RDS vs. EC2, sizing for performance
Creation and maintenance of DR/HA (Disaster Recovery/High Availability) and backup and recovery policies and procedures (multi-region backup)
Support for Oracle license selection, Enterprise → Standard migration
Monitoring database instances
Implementation and maintenance of database security (wallet, SSL)
Patch management and version control
Automated installation and configuration of Oracle databases using Terraform and Ansible

Sep 2015 - Jul 2016

11 months

Migration of existing data warehouse from HPUX/Oracle 10g to AWS

Johnson & Johnson MEDICAL GmbH

Installation and configuration of the database including parameter optimization on AWS EC2 instance; backup configuration with RMAN and Amazon S3
Adaptation of shell scripts from HPUX to RHEL
Setting up and configuring the APEX application server
Support for migrating the database from 10g to 12c and APEX from version 3 to 5
Evaluation of using RDS instead of a dedicated EC2 instance
Building test and production environments

Apr 2015 - Present

10 years 11 months

Oracle Database Administrator (DBA) in the field of biometric identification

DERMALOG Identification Systems GmbH

Migration and upgrade of very large databases (VLDB) with Oracle standby databases / Data Guard
Bidirectional data replication with Oracle GoldenGate; Oracle Advanced Replication / Materialized View
Performance & tuning with Statspack, AWR, deadlock analysis, Snapper
Installation and configuration of Oracle Clusterware (RAC)
Analysis and recovery of corrupt database blocks

Apr 2015 - Mar 2017

2 years

Oracle Performance & Tuning for Output & Document Management System

Schenker AG

Database performance analysis, testing, and implementation with Oracle Statspack, SQL Explain Plan, TKPROF, SQL tracing
Introduction of partitioning
SQL, PL/SQL, and shell scripting and knowledge transfer

Nov 2012 - Dec 2014

2 years 2 months

Oracle database administration and Linux administration for the large-scale procedure KoPers

Dataport AÖR

Setup and support of technical process operations
Operation and maintenance of the application and database layer in cooperation with the vendor
Administration of SUSE Linux Enterprise Server and Oracle databases
Diagnostics and tuning for Oracle database performance
Quality assurance of backup routines with RMAN and EMC Data Domain
Adding customer-specific details to vendor documentation

Apr 2012 - Sep 2012

6 months

Oracle Database Administrator, Developer

GDV Dienstleistungs-GmbH & Co. KG

Analysis of the application's availability and stability in the Oracle RAC environment
Application redesign for Oracle RAC: distributed workload management, failover, load balancing, fast application notification, transparent application failover
Disaster recovery configuration with Oracle Data Guard
Oracle PL/SQL and SQL performance & tuning
Supporting developers with debugging, redesign, and performance tuning
Designing and implementing ETL processes (data warehouse)
Administration and configuration of Oracle databases in development and integration
Database and system monitoring with Nagios/OpenNMS

Aug 2011 - Mar 2012

8 months

Oracle Performance Specialist and Oracle DBA

Otto (GmbH & Co KG)

Operational management of e-commerce sites and related systems
Oracle performance & tuning: analysis, testing and implementation, PL/SQL and SQL optimization, AWR analysis
Configuration of Oracle database instances as well as software and hardware sizing
Process control and automation; monitoring and error detection
3rd level support for Oracle DBAs
Project support in analysis and design
Documentation and knowledge transfer

Nov 2010 - Jun 2011

8 months

SAP Basis Administrator, Oracle Database Administrator (DBA)

Stadtreinigung Hamburg

Operating and maintaining SAP systems (NetWeaver 7.0) on Linux
Central user management and SAP job scheduling
Transport management/transport controlling and homogeneous system copies
Performing SAP and Oracle migrations, upgrades, and software rollouts
SAP interface administration (BatchInput, RFC, BAPI)
Oracle database administration: upgrades, patches, migration
Support and troubleshooting of production Oracle databases for SAP and DWH
System monitoring with Nagios
Backup and recovery (SAP and Oracle)

Aug 2009 - Dec 2009

5 months

Oracle database administration and support for highly available web applications

GDV Dienstleistungs-GmbH & Co. KG; eSailors IT Solutions GmbH

System monitoring and maintenance of Oracle instances
PL/SQL and SQL performance & tuning, AWR analysis
RMAN database backup: planning, support and monitoring
2nd/3rd level technical helpdesk
Training of operations staff: Oracle training on database specifics, monitoring & housekeeping tasks

Feb 2009 - Jul 2009

6 months

Oracle Database Administrator, Trainer, Team Lead

Gesamtverband der Deutschen Versicherungswirtschaft e.V.

System monitoring and maintenance of Oracle instances in an RAC environment
Designing, installing and configuring test environments (RAC with Data Guard on VMware)
Functional team leadership, documentation and knowledge transfer
Training of operations staff (DBAs)
Leading a small Oracle DBA team
Disaster recovery scenario with Oracle Data Guard
Oracle performance & tuning: analysis, testing and implementation

Feb 2008 - Jul 2008

6 months

Oracle Database Administrator, System Administrator, System Architect

GDV Dienstleistungs-GmbH & Co. KG; Easynet GmbH

Configuration, installation, and implementation of Oracle MAA (RAC with Data Guard) at two sites
Implementation of dual-site RAC clusters for disaster recovery
High-availability components: multipath I/O, NIC bonding, ASM, OCFS2, failover, and load balancing
Monitoring using SNMP
Proof of concept, proof of technology, and documentation

Nov 2007 - Jan 2008

3 months

Oracle Database Administrator, Developer

Implico GmbH

Support for the migration of OpenTAS 4.0 from Oracle 9iR2 to 10gR2: concept, testing, implementation
Configuration of Oracle 10gR2 instances: software sizing, init parameters, maintenance tasks, batch processing
Database model and view redesign (RBO → CBO)
Support for developers and client consultants in debugging, redesigning, and tuning
Documentation, training, and knowledge transfer

May 2007 - Sep 2007

5 months

SAP Basis Administrator, Oracle DBA, SIRAX Administrator

Lufthansa Systems AS GmbH

Development of technical tools for SAP and SIRAX administration
Support for new clients in setting up SAP systems for SIRAX
SAP authorizations, transport management, interface management
Automation of SAP transports
SAP patch and release management
Detailed documentation of activities

Nov 2006 - Mar 2007

5 months

Oracle Database Administrator and Developer

Hamburger Sparkasse (HASPA)

Migration from DB2 (z/OS) to Oracle 10g: data model, SQL, PL/SQL, triggers, referential integrity
Data migration using SQL*Loader and automation via shell and Perl scripting
Administration and configuration of 12 Oracle databases in development, integration, and production
Performance and tuning of migrated applications and databases

May 2006 - Oct 2006

6 months

Oracle Database Administrator, Solaris System Administrator

02 (Germany) GmbH & Co.

Planning (high-level and detailed design) and installation of Oracle 9i databases
Configuration of 11 Oracle instances including Sun Cluster
Performance and tuning: partitioning, ER analysis, SQL tracing
Benchmarking on development and production platforms
Data migration of 2 TB from London to Frankfurt

Nov 2005 - Mar 2006

5 months

SAP Basis Administrator

Marktplatz Services GmbH

Planning and execution of support packages and industry solutions (patch and release management)
Performance and error analyses as well as tuning in the SAP and database environment
Troubleshooting and error analysis of DB and SAP R/3 systems
Performance optimization (SQL, parameterization) of Oracle and SAP R/3 basis
Backup of SAP systems and disaster recovery (Oracle Data Guard)

Apr 2004 - Oct 2005

1 year 7 months

ITO/ITI Head, Oracle DBA, SAP R/3 Basis Administrator

Mercateo AG

Planning and design of system architectures; proactive and reactive system management
Definition of SLAs and ensuring 24x7 system availability according to the SLA
Coordination of configuration management for development, test, and production environments
Leadership of a small team of IT specialists
Review of the security concept
Creation and management of the IT budget

Mar 2002 - Sep 2002

7 months

Oracle DBA & Unix Administrator

Portal Software (Hamburg) GmbH

Planning, design, and operation of Oracle database administration
Development and implementation of disaster recovery and security concepts for database and OS components
System maintenance (updates, upgrades, optimization), monitoring, and performance tuning
Support of production operations, data warehousing, and data mining

Sep 2001 - Feb 2002

6 months

Oracle Administrator & Designer, Solaris and Linux Administrator

Nikotel Deutschland AG

Design and development of complex database configurations for performance and redundancy in a cluster environment
Administration, backup, and recovery of Oracle databases
Project management and close collaboration with development teams for new database system design

Feb 2001 - Aug 2001

7 months

Oracle Database Administrator and Developer

BizTec AG

Production Support Management for database servers
Collaboration with developers and technology managers for tailored solutions
Installation and monitoring of INTERSHOP Enfinity and Oracle databases
Analysis and tuning of applications through SQL optimization (stored procedures, triggers)

Sep 1997 - Jan 2001

3 years 5 months

IT Project Manager, Developer/Analyst

Kameron GmbH

Coordination and oversight of project tasks for information systems
Task assignment and management of five developers
Software design, simulation, modification, testing, and documentation throughout the entire project

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (18.5 years), Banking and Finance (4.5 years), Government and Administration (2.5 years), Transportation (2 years), Insurance (1.5 years), and Healthcare (1 year).

Information Technology

Banking and Finance

Government and Administration

Transportation

Insurance

Healthcare

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (24 years), Operations (6.5 years), Project Management (4 years), Product Development (3.5 years), Business Intelligence (2 years), and Quality Assurance (2 years).

Information Technology

Operations

Project Management

Product Development

Business Intelligence

Quality Assurance

Skills

Oracle Database Administrator / Specialist (Dba)
Cloud Database Expert (Aws, Oracle, Azure)
Linux/unix System Administration
Oracle Performance & Tuning; Migration; Replication
High Availability, Data Guard, Cluster (Rac)
Oracle: Expert Knowledge: Oracle 8i - 23c, Many Years Of Oracle Dba Experience, Ocp (Certificate), Sql, Pl/sql Development, Performance & Tuning, Sql Optimization, Rac, Data Guard, Multitenant Db
Ms Sql Server: Administrator - Very Good Knowledge, Ms Sql 7.0 - 2022
Postgresql, Mysql/mariadb: Administrator - Very Good Knowledge
Amazon Relational Database Service (Rds): Postgresql, Mariadb, Mysql, Aurora
Oracle Cloud Infrastructure (Oci): Autonomous Database Specialist (Certificate)
Linux: Redhat, Oracle Linux, Centos, Opensuse 6.2-15, Sles 8-15
Unix: Solaris 2.6-11
Windows: Windows Nt/2000/2003/2008/2012/2016/2019/2022 As Administrator
Ibm Aix 4.3.3/5l 5.2/7.3, Hp-ux: Good Knowledge
Git: Github, Gitlab, Bitbucket
Virtualization: Vmware, Kvm, Oracle Vm, Docker, Virtualbox, Vagrant
Config Management: Ansible, Puppet, Cloudformation, Chef, Packer
Infrastructure As Code (Iac): Terraform
Logging & Monitoring: Check Mk, Nagios/icinga, Grafana, Splunk
Quality/testing: Apache Jmeter
Jira, Confluence, Slack
Build: Jenkins, Maven, Travis Ci
Oracle Tools: Sqlplus, Sql*loader, Awr, Statspack, Rman, Logminer Etc.
Dell (Quest) Toad, Sql Navigator, Spotlight, Pl/sql Developer, Oracle Sql Developer
Oracle Enterprise Manager Cloud Control, Oracle Enterprise Manager Grid Control
Oracle Advanced Queuing, Oracle Streams, Goldengate, Oracle Advanced Replication
Oracle Audit Trail, Oracle Unified Auditing
Oracle Application Express (Apex)
Oracle Business Intelligence, Warehousebuilder, Discoverer, Businessobjects, Cognos
Agile Software Development
Scrum
Rad (Rapid Application Development)
Hci: Dell Emc Vxrail
Nutanix: Nx Nodes, Nutanix On Hpe Platform
Oda - Oracle Database Appliances – X3-2, X4-2, X5-2, X8-2, X9-2 (S, M And Ha Models)
Hpe: Hp Proliant Server, Hp Alphaserver Systems
Ibm: Xseries, Eservers, Mainframes, Mainframe
Sun: Sun Enterprise Servers, Sun Fire Servers

Languages

Slovak

Native

German

Advanced

English

Advanced

Education

Oct 1994 - Jun 1999

University of Economics Bratislava

Dipl. Ing. in Computer Science and Software Engineering, Faculty of Economics · Computer Science and Software Engineering · Bratislava, Slovakia

Oct 1990 - Jun 1994

Konstantinova High School

Prešov, Slovakia

Certifications & licenses

Oracle Autonomous Database Cloud 2021 Certified Specialist

Oracle Certified Professional - Database Administrator

Profile

Created

September 2025

Last Update

November 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Adrian based?

Adrian is based in Wedel, Germany.

What languages does Adrian speak?

Adrian speaks the following languages: Slovak (Native), German (Advanced), English (Advanced).

How many years of experience does Adrian have?

Adrian has at least 24 years of experience. During this time, Adrian has worked in at least 19 different roles and for 21 different companies. The average length of individual experience is 1 year and 2 months. Note that Adrian may not have shared all experience and actually has more experience.

What roles would Adrian be best suited for?

Based on recent experience, Adrian would be well-suited for roles such as: Interim Consultant for Oracle Database Migrations to the AWS Cloud, Migration of existing data warehouse from HPUX/Oracle 10g to AWS, Oracle Database Administrator (DBA) in the field of biometric identification.

What is Adrian's latest experience?

Adrian's most recent position is Interim Consultant for Oracle Database Migrations to the AWS Cloud at Bank Deutsches Kraftfahrzeuggewerbe GmbH.

What companies has Adrian worked for in recent years?

In recent years, Adrian has worked for Bank Deutsches Kraftfahrzeuggewerbe GmbH and DERMALOG Identification Systems GmbH.

Which industries is Adrian most experienced in?

Adrian is most experienced in industries like Information Technology (IT), Banking and Finance, and Government and Public Administration. Adrian also has some experience in Transportation and Logistics, Insurance, and Healthcare.

Which business areas is Adrian most experienced in?

Adrian is most experienced in business areas like Information Technology (IT), Operations, and Project Management. Adrian also has some experience in Product Development, Quality Assurance (QA), and Business Intelligence.

Which industries has Adrian worked in recently?

Adrian has recently worked in industries like Information Technology (IT) and Banking and Finance.

Which business areas has Adrian worked in recently?

Adrian has recently worked in business areas like Information Technology (IT).

What is Adrian's education?

Adrian holds a Master in Computer Science and Software Engineering from University of Economics Bratislava.

Does Adrian have any certificates?

Adrian has 2 certificates. These include: Oracle Autonomous Database Cloud 2021 Certified Specialist and Oracle Certified Professional - Database Administrator.

What is the availability of Adrian?

Adrian is immediately available for suitable projects.

What is the rate of Adrian?

Adrian's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.