Oracle Database
Expert
I transform complex database challenges into streamlined solutions. Specializing in large-scale migrations, performance optimization, and Oracle infrastructure for enterprises.
About Me
I'm Peter Gronemann, an Oracle Database Consultant who has spent over two decades solving critical database challenges for telecommunications, insurance, and government organizations worldwide.
My journey has taken me from Malaysia to Dubai, from Austria to Switzerland, working with clients who need their Oracle systems to perform flawlessly under pressure. I thrive on the complex problems—the migrations of 500+ databases, the performance bottlenecks that seem unsolvable, the upgrades that keep teams up at night.
When I'm not optimizing databases, you'll find me cycling through Swiss mountain passes or capturing landscapes through my camera lens. Based in Switzerland and currently working with Concordia Insurance, I'm always open to discussing challenging projects starting February 2027.
Based in Switzerland
Open to relocation
Cycling Enthusiast
Mountain passes
Photography
Landscape captures
Core Skills & Expertise
Proven track record delivering enterprise-scale Oracle solutions
Orchestrated 1,700+ Database Migrations
Across Oracle 9i through 19c, including Exadata platforms with zero data loss
Tuned Mission-Critical Systems
Achieving up to 300% performance improvements for telecom billing and enterprise apps
Architected High-Availability Solutions
Using ASM, DataGuard, and Grid Infrastructure for zero-downtime environments
Developed Custom PL/SQL Solutions
Automated manual processes and reduced processing time by 60%
Oracle Database Consolidations
Reducing infrastructure costs while improving performance and security
Mastered Oracle 19c Pluggable Databases
Container architecture for modern cloud-ready deployments
Troubleshoot Complex Issues Under Pressure
Resolving critical production incidents in hours, not days
Featured Projects
Large-scale Oracle implementations across enterprise environments
Mass Database Migration
Federal IT Infrastructure
Challenge
Migrate 500+ Oracle databases from Exadata to IBM Power System without disrupting government services
Solution
Designed and executed phased migration strategy with automated validation and rollback procedures
Technologies
Enterprise-Wide Oracle 19c Upgrade
Government Infrastructure
Challenge
Upgrade 500+ production databases from 12c to 19c on Exadata while maintaining 99.9% availability
Solution
Built automated pre-upgrade analysis framework and parallel upgrade methodology
Technologies
Telecom Billing Consolidation
LHS Dubai
Challenge
Consolidate 54 separate Oracle 8 BSCS instances into single Oracle 10g instance for major Middle East telecom
Solution
Developed custom PL/SQL migration procedures with data validation and reconciliation logic
Technologies
Swiss Post Database Modernization
National Postal Service
Challenge
Upgrade 700+ Oracle 11g databases to 12c on Exadata and convert to Unicode (UTF-8)
Solution
Created parallel upgrade framework with automated characterset conversion and validation
Technologies
Professional Experience
25+ years delivering Oracle solutions across telecommunications, insurance, and government sectors
Senior Oracle DBA
Concordia Insurance
- Oracle 19c Database Administration
- Oracle Migration NonCDB to CDB
- Oracle Troubleshooting and Performance Tuning
Senior Oracle DBA
Federal Office of Information Technology
- Oracle 11g, 12c, 19c Administration
- Migrate 500+ Databases from Oracle Exadata to IBM Power System
- Upgrade of 500+ Oracle 12c Databases (Exadata) to Oracle 19c (Exadata)
- Upgrade of 500+ Oracle 11g Databases (AIX) to Oracle 12c (Exadata)
Senior Oracle DBA
Swiss Post AG
- Upgrade of 700+ Oracle 11g Databases to Oracle 12c (Exadata)
- Conversion to Unicode Characterset (UTF8)
Senior Oracle DBA
Federal Office of Information Technology
- Oracle 11g Administration
- Trouble Shooting
- Performance Tuning
- Enterprise Manager Reporting and Alarming
Senior Oracle DBA
Swiss Post AG
- Upgrade of 500+ Oracle 10g Databases to Oracle 11g
- Move of Databases to Oracle Exadata X4
- Implementing the Oracle Grid infrastructure
- Troubleshooting, Performance Tuning
- PL/SQL Development for "Parcel Track and Trace" PADASA
Senior Oracle/BSCS Consultant
Opitz Consulting
- Database Administration and Troubleshooting for various customers
- PL/SQL Development
Senior Oracle/BSCS Consultant
Swisscom AG
- Database Performance Tuning, Monitoring, SQL Tuning
- Compression of XML LOBs (Itemized Bills) to reduce space and increase processing speed
- 11g Advanced Compression
- 11g Optimizer configuration, SQL Baselines
- Oracle BRM environment replication using Datapump and PL/SQL
Senior Oracle/BSCS Consultant
LHS Dubai
- Migration of 54 BSCS 5.21 Oracle 8 instances into one Oracle 10g BSCS iX R2 instance
- Reorganisation of production databases: sizing, tablespaces, storage, partitioning, I/O balancing
- Tuning of PL/SQL migration procedures
Senior Oracle DBA
Trivadis AG
- Database Administration and Troubleshooting for various customers
- PL/SQL Development
- Application Performance Tuning
Senior Oracle/BSCS Consultant
RP International
- Oracle DBA, Oracle Performance Tuning
- BSCS Migrations, Implementations, Performance Tuning
Oracle/BSCS Consultant
LHS Asia Pacific
- Oracle DBA, Oracle Performance Tuning
- BSCS Migrations, Implementations, Performance Tuning
Software Development, Sales
Hima KBN
- Software Development
Software Development
Aerodata Flugmesstechnik GmbH
- Software Development
Let's Connect
Looking for an Oracle specialist to tackle your next database challenge?
Whether it's a large-scale migration, performance crisis, or complex upgrade project, I bring 25+ years of proven results.
Or connect with me directly:
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