Olusegun Oluyemi

About Olusegun Oluyemi

I am a Data Engineer with 10 years of experience in data management and administration. Capable of designing, developing, and optimizing scalable data pipelines, ETL frameworks, and database administration. I have great interpersonal skills, which allow me to communicate effectively, work as a team, motivate others, and boost productivity. I am skilled in analyzing complex issues related to managing, processing, and storing large datasets, enabling rapid identification and resolution of data problems to minimize downtime and prevent disruptions in data processes.I have advanced knowledge in ETL / ELT, Data Integration, Data Processing, Big Data, Data Orchestration, Data Transformation, Data Warehousing, Data Lake, Data Modeling, Structured Query Language (SQL), Python, Scala, AWS (Amazon Web Services), Azure, Apache Spark, Azure Data Factory, Azure Databricks, Azure Synapse and Snowflake

Experience

1. Senior Data Engineer

   AT&T

   Sep 2025 — Present · Dallas, TX, US

   Planned, executed, and validated the migration of all enterprise SQL Server environments from 2019 to 2022, ensuring minimal downtime and seamless business continuity. Reviewed all linked server configurations, authentication models, and network dependencies, updating drivers and connection settings to ensure full functionality post-upgrade. Managed and maintained large-scale SQL Server databases, ensuring high availability, performance tuning, and optimal query execution through indexing, monitoring, and regular health checks. Designed and maintained CI/CD pipelines using tools such as Azure DevOps and GitHub repository, enabling automated build, test, and deployment processes and reducing release cycle time by up to 40%. Provisioned and managed cloud infrastructure across Azure using Infrastructure as Code (IaC) tools like Terraform and YAML templates, ensuring scalable, secure, and highly available environments.

Education

• Lagos City Polytechnic

  HND in Computer Science, Computer Science

  2004 — 2006

• Ladoke Akintola University of Technology, Ogbomosho

  Masters in Information Technology (MIT), Computer Science

  2009 — 2011

• Ladoke Akintola University of Technology

  Post Graduate Diploma (PGD) in Computer Science, Computer Science

  2009 — 2011

Skills

• Data Warehousing
• Mysql
• Performance Tuning
• Html5
• Database Design
• Application Support
• Sql
• Linux
• Software Development
• Database Administration
• Microsoft Sql Server
• Pl/Sql
• Premia Application
• Sql Tuning
• Oracle Application Server
• Microsoft Office
• Business Analysis
• Security
• Oracle Rac
• Operating Systems
• Vasco
• Databases
• Web Applications
• Oracle