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russell mazelsky

@russellmazelsky2

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Senior Database Architect with 15+ years designing scalable relational and non-relational data platforms.

United States

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What I'm looking for

I’m looking to lead database architecture and ETL/BI initiatives, optimize performance and data integrity in high-volume environments, and build robust, secure data platforms that support mission-critical services.

I’m a Senior Database Architect / DBA with 15+ years of experience designing, optimizing, and sustaining relational and non-relational data platforms. I lead ETL and BI initiatives using Oracle and SQL Server across high-volume environments, with a strong focus on performance, scalability, and data integrity.

At ESR Healthcare, I’ve served as the Lead Data Architect and DBA on a team of 15, supporting development and operations while running automated and manual BI and ETL processes. I created and validated complex SQL across multiple environments (PL/SQL, T-SQL, PRO*C/C) to resolve difficult performance issues, and I handled core DBA responsibilities including backup and recovery, data quality, and database tuning for large, heavily used systems.

I’ve also shaped data architecture end-to-end as a consultant and architect—building ETL staging and migration solutions, profiling/cleansing data, and aligning security and compliance requirements (including SOX-focused validation). Earlier in my career, I designed enterprise reporting and data warehouse systems, developed and migrated database architectures, and even taught Oracle database administration courses—so I bring both practical delivery and long-term architectural thinking to every engagement.

Experience

Work history, roles, and key accomplishments

Database Architect (Consultant)

Sempra Energy

Sep 2012 - Jan 2013 (4 months)

Developed an MSSQL Server ETL architecture to integrate millions of rows of asset, HR, and security data into a staging environment for database migration. Profiled, cleansed, validated, and mapped data to meet corporate security/SOX standards and translate business reporting requirements into ETL processes.

MS SQL Server T SQL ETL Data Profiler Data Cleanse Data Mapping Data Migration SOX Compliance

Database Consultant

eSignal Corporation

Apr 2006 - Jun 2006 (2 months)

Provided production and application DBA support for Microsoft SQL Server and Oracle 9i, including configuration, release, and performance troubleshooting. Implemented and tested stored procedures (SQL Server/Oracle), performed database tuning and partitioning, and managed Oracle on Linux operations.

SQL Server T SQL Oracle 9i Pl SQL SQL Tuning Statspack SQL Loader

System Configuration Manager Consultant

Intuit

Apr 2004 - Feb 2005 (10 months)

Led technical project management for system configuration management best practices across legacy Oracle and SQL Server data warehouse repositories. Directed development/QC teams and supported the migration of four large enterprise intelligence projects using Informatica and related BI tooling.

SQL Server Informatica Business Objects Hyperion Configuration Management SDLC Pl SQL PRO*C C Programming

Technical Manager/Consultant

Global Training & Consulting Inc.

Nov 2000 - Aug 2001 (9 months)

Managed teams developing multimedia online training for Oracle certification, hosted on NT servers using IIS while supporting Oracle8i/9i and OracleApps 11i coursework. Handled administration and migrations across Solaris/NT environments, including Oracle database installation/configuration, backups/recovery scheduling, and Siebel 2000 CRM setup.

Oracle Solaris Unix Administration Oracle 9i Apache Backup & Recovery Oracle UNIX Scheduling

Project Management and Technical Consultant

Nortel Networks

Feb 2000 - May 2000 (3 months)

Managed a team delivering a web-based approval system with an Oracle-backed database by gathering functional/design requirements and leading configuration control and test management. Designed the schema and business rules, and maintained version release control and documentation throughout the project.

Visual SourceSafe Oracle Database Schema Design Requirements Gathering Test Management Configuration Management Visual Source Safe Quality Assurance Source Code Control Web Applications

Senior Technical Consultant

JUSCO Co., Ltd.

Apr 1998 - Dec 1999 (1 year 8 months)

Provided enterprise-level technical leadership for data warehousing, including business process/data modeling and guidance for migration and integration strategies. Led technical evaluations of three major systems, coordinated teams of 250 people across locations, and assessed/operationalized monitoring and scheduling toolsets.

Enterprise Data Modeling Data Warehousing Systems Architecture Data Integration Monitoring & Job Scheduling Windows NT Source Code Control

Consultant to Associate Director

Genentech Inc.

Feb 1997 - Dec 1997 (10 months)

Selected and implemented SDLC, configuration management, and Oracle*Clinical enhancement tooling to support pharmaceutical approval-cycle workflows. Implemented data transfer and preprocessing for loading into Oracle*Clinical, integrating scheduling via UNIX shell scripts and selecting PVCS/ClearCase/bug-tracking tools for execution.

Oracle Clinical SAS Configuration Management PVCS ClearCase Shell Scripting SDLC Data Warehouse