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Denis Mbzi-Nkia

@denismbzi-nkia

Senior SQL Server Database Administrator at Global Payments who improved query response times by ~40% and delivered ~$250K in annual savings.

United States

Message

At Global Payments, I administer 14TB+ SQL Server estates supporting 24x7 payment workloads across on-premises and Azure infrastructure. I improved query response times by ~40% and delivered ~$250K in annual infrastructure and licensing savings.

I led on-premises-to-Azure migrations into Azure SQL Database and Managed Instance, and designed and operated Always On Availability Groups with quarterly failover testing. I also design and test disaster recovery plans across primary and DR sites.

Before Global Payments, I administered SQL Server and Azure SQL environments at LyondellBasell Industries and supported database operations at CSAT Solutions, Security Service Federal Credit Union, and the University of Amsterdam. My work has included performance tuning, incident response, database automation, and recovery readiness.

Experience

Work history, roles, and key accomplishments

Current

Senior Database Administrator / Cloud Database Engineer

Current

Global Payments

Jul 2023 - Present (3 years 3 months)

Administer 14TB+ SQL Server estates supporting mission-critical 24x7 production payment workloads across on-premises and Azure. Improved query response times ~40% and delivered ~$250K in annual savings through consolidation and migration.

SQL Server Azure SQL Database Azure SQL Managed Instance AlwaysOn Availability Groups Failover Cluster Instance T SQL SQL Query Store Execution Plan Analysis Index Tuning SolarWinds DPA SQL Sentry PowerShell dbatools Disaster Recovery RPO Planning Incident Response Azure DevOps CI CD

Lead SQL Server Database Administrator

CSAT Solutions

Mar 2020 - Jul 2023 (3 years 4 months)

Led administration, deployment, and production support of SQL Server across development, QA, and production. Built failover clusters and Always On Availability Groups, led DR design and testing, and mentored junior DBAs.

SQL Server AlwaysOn Availability Groups Failover Clustering Disaster Recovery T SQL SQL Query Store Extended Events SQL Server Profiler SQL Server DMVs PowerShell Ansible CI CD Mentorship

Senior Database Administrator

LyondellBasell Industries

Jan 2019 - Mar 2020 (1 year 2 months)

Administered SQL Server and Azure SQL environments including Azure SQL Database, Managed Instances, elastic pools, and SQL Server on Azure VMs. Implemented Azure AD authentication and MFA for privileged access.

SQL Server Azure SQL Database Azure SQL Managed Instance Elastic Pools Azure AD MFA SQL Query Store SQL Server Profiler Extended Events Database Engine Tuning Advisor Backup And Recovery Patching

SQL Server Database Administrator

Security Service Federal Credit Union

Jul 2018 - Jan 2019 (6 months)

Delivered SQL Server administration and production support in a regulated financial-services setting. Responded to outages and performance incidents through 24x7 on-call rotation.

SQL Server AlwaysOn Availability Groups Failover Clustering Disaster Recovery Index Maintenance DBCC Commands Backup Performance Optimization Incident Response

SQL Server Database Administrator

University of Amsterdam

Apr 2010 - Jun 2018 (8 years 2 months)

Administered SQL Server 2008 R2–2016 environments across production, QA, and development. Supported Always On HA/DR, failover clusters, and built job, alert, and monitoring frameworks.