David Yahalom

David Yahalom

CTO

Location
Israel
Industry
Information Technology and Services

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David Yahalom's Overview

Current
Past
  • Head of H.A technologies at Veracity Group
  • CTO at Govermental
  • Senior Database Project Manager at Veracity Group
  • Senior Database Consultant & DBA Expert at Xpert One1
  • Database Consultant & DBA at Malam
  • Team Leader & DBA at Govermental
Education
Connections

500+ connections

Websites

David Yahalom's Summary

I'm a CTO, Oracle / BigData / NoSQL DBA group manager, lead architect and hands-on database consultant/DBA living my passion.

I have over eleven years of experience in database & information systems complete architecture design, leading database teams and as a database consultant and senior DBA.

- Senior manager, founder and CTO in charge of the technological vision and Oracle/NoSQL/BigData delivery of Israel's largest DB consulting company managing over 15 people.

- Responsible for end to end delivery of database related projects and leading teams in various complex and diverse enterprise-level environments.

- Hands on DB expert - Oracle, Hadoop, CouchBase, MSSQL, MySQL, PostgreSQL.

- Providing support, troubleshooting and consulting for over 60 different corporations in Israel and across the world.

- The go-to-guy for pre-sales technical discussions for Oracle Israel.

- Providing end-to-end database solutions from schema design and database tuning to infrastructure aspects (network, storage, servers).

- In-depth experience with Oracle database tuning for very large and high-TPS databases for both real time and batch environments including the world's largest TELCO billing database.

- In-depth experience with schema design and ERD models for large scale applications.

- Designing and supporting critical 24X7 Oracle, Hadoop, PostgreSQL and MySQL systems.

- In-depth experience with Oracle GoldenGate for realtime BI, zero downtime database upgrades as well as ACTIVE/ACTIVE high-availability.

- Planning and implementing complex Oracle RAC and DRP (DataGuard, GoldenGate and storage replication) solutions.

- Leading Oracle Security projects including: DB hardening, TDE, Database Vault, Sentrigo Database Firewall, externally identified users, etc..

- In-depth knowledge in writing software and scripting in several languages.

- In-depth experience with multiple Business Intelligence platforms.

Database platforms: Oracle, Hadoop, SQL Server, PostgreSQL, MySQL.

David Yahalom's Experience

Privately Held; 11-50 employees; Computer Software industry

June 2010Present (3 years 11 months)

- CTO and hands-on founder of the Oracle / Hadoop group for Israel's largest database consulting company.

- In charge of the day to day management, technological vision and technological delivery of the database consulting group in the following database technologies:

- Oracle database.
- Hadoop.
- PostgreSQL.
- MySQL.
- Couchbase.
- Microsoft SQL Server.

Head of H.A technologies

Veracity Group

Privately Held; 51-200 employees; Information Technology and Services industry

August 2009August 2010 (1 year 1 month)

CTO

Govermental

October 2008August 2010 (1 year 11 months)

Directing a database oriented organization in terms of short and long term technological strategy, infrastructure design, vendor choice and partnership, product selection, creating internal technological procedures and managing customer satisfaction levels.

Senior Database Project Manager

Veracity Group

Privately Held; 51-200 employees; Information Technology and Services industry

September 2008August 2010 (2 years)

Re-architecture, overhauling and tuning one of the world's largest cellular billing databases running on a massively parallel Itanium-based HP Superdome.

Leading complex and diverse database infrastructure design projects and writing detailed design documents.

Leading and implementing migration from single instance databases to complex Oracle RAC + DataGuard configurations.

Researching MPP database solutions such as Hadoop and Greenplum.

Designing complex MySQL implementations and complete MySQL-based architectures for critical 24X7 operations including DRP and scale-out replication, backup and recovery strategies and performance scaling.

Leading database virtualization projects based on the VMWARE ESX platform.

Leading Oracle Security projects including: KERBEROS, TDE, Oracle Database Vault, Sentrigo, strong authentication, externally identified users.

Leading extreme large scale Oracle Grid Control deployments for proactive monitoring of enterprise organizations.

Providing performance tuning, schema design and modeling for various development teams.

Writing dozens of short tech tips and published articles via my blog: http://www.davidyahalom.com

Go-to-guy for pre-sales technical discussions.

Cross-platform Oracle performance benchmarking and datacenter migration.

Experience with Oracle Advanced Replication.

Writing Custom Grid Control plugins.

Designing Oracle storage frameworks using NetAPP and ASM.

Extensive experience with Linux/Unix.

Leading system acceptance testing projects.

Senior Database Consultant & DBA Expert

Xpert One1

Privately Held; 51-200 employees; Information Technology and Services industry

August 2007October 2008 (1 year 3 months)

Senior Oracle DBA and consultant for Enterprise level organizations.

Administrating and supporting critical 24X7 Oracle databases including multi-million users web configurations.

Designing , implementing and migrating complex Oracle RAC configurations.

Planning and implementing DRP with Oracle DataGuard.

Hardening Oracle & implementing DB firewalls inc. Sentrigo Hedgehog.

Implementing NETAPP storage fillers in Oracle RAC configurations.

Proactive monitoring using Oracle Grid Control.

Designing and implementing Oracle backup strategies, RMAN scripting and storage snapshots.

Extensive experience in Linux and UNIX environments.

Technologies Presenter at IOUG & Instructor at John Bryce training.

Providing performance tuning, schema design and modeling for various development teams.

Writing dozens of short tech tips and published articles.

Go-to-guy for pre-sales technical discussions.

Cross-platform Oracle performance profiling, benchmarking.

Database Consultant & DBA

Malam

Public Company; 1001-5000 employees; Information Technology and Services industry

August 2006September 2007 (1 year 2 months)

Oracle consultant for various Enterprise and SMB level organizations on Windows and UNIX platforms.

Designing and supporting an ETL data consolidation process from several legacy
systems to a central open database.

Providing ongoing long term database support, tuning and schema design consulting for a large development team.

Designing and supporting backup and recovery strategies of VLDB oracle databases.

Experience in working with RMAN for complex backup procedures.

Extensive Instance and SQL tunning in VLDB OLTP environments.

Lead DBA of a VLDB DB2 LUW financial project.

Experience in Cognos 8.

Team Leader & DBA

Govermental

July 2002August 2006 (4 years 2 months)

Team Leader and Oracle DBA in a large DSS and OLTP environment.

Day to day installation, administration, support and configuration of various large Oracle databases.

Designing and implementing Oracle backup and recovery strategies.

Designing and modeling Business Objects universes in an HR environment.

Designing, implementing and supporting a complex ETL process from a legacy IBM MF to an open Oracle database.

Extensive Instance and SQL tunning in VLDB OLTP environments.

Writing and maintaining PL/SQL stored procedures.

Writing VB front ends to PL/SQL database logic.

Writing Perl scripts.

Leading an ERP project.

David Yahalom's Publications

  • Oracle Israel professional newsletter

    • Israel
    Authors: David Yahalom

David Yahalom's Languages

  • English

    (Native or bilingual proficiency)
  • Hebrew

    (Native or bilingual proficiency)

David Yahalom's Skills & Expertise

  1. Oracle
  2. PL/SQL
  3. Microsoft SQL Server
  4. SQL
  5. Unix
  6. Linux
  7. Business Intelligence
  8. Oracle RAC
  9. Windows
  10. SQL Tuning
  11. High Availability
  12. Database Administration
  13. Databases
  14. Shell Scripting
  15. Performance Tuning
  16. Architecture
  17. Virtualization
  18. Replication
  19. Data Migration
  20. Enterprise Software
  21. Database Design
  22. Servers
  23. Data Center
  24. Pre-sales
  25. Storage
  26. MySQL
  27. ETL
  28. T-SQL
  29. DB2
  30. Hadoop
  31. GoldenGate
  32. PostgreSQL
  33. DataGuard
  34. DRP
  35. Database Security
  36. Architectures

View All (36) Skills View Fewer Skills

David Yahalom's Education

The Open University

Interdisciplinary Computer Science & Business

20082012

John Bryce

Various professional IT courses

20022009

Contact David for:

  • career opportunities
  • consulting offers
  • new ventures
  • job inquiries
  • expertise requests
  • business deals
  • reference requests
  • getting back in touch

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