Marcellus mbu
West Orange
Summary
Results-driven Senior Data Engineer with expertise in AWS database management, MySQL, PostgreSQL, and Redis. Streamlined ETL processes, enhancing performance and stability through automation and strategic tuning. Delivered scalable, reliable database operations while reducing manual tasks, significantly improving operational efficiency.
Overview
9
9
years of professional experience
1
1
Certification
Work History
Data Engineer
Bereans Information Technology
New Jersey
01.2023 - 01.2026
- Built and optimized AWS data pipelines for batch and streaming workloads using Glue, EMR, Lambda, and Kinesis, Kafka, improving ETL performance by 60% and enhancing data availability for 5+ TB/day ingestion.
- Automated cloud infrastructure and database deployments using Terraform and CloudFormation, provisioning Redshift, Aurora PostgreSQL, and DocumentDB with fully repeatable IaC workflows.
- Improved database reliability and performance through tuning, monitoring, and Python/Lambda automation (vacuuming, snapshots, schema drift detection), increasing SLA stability by 45% and reducing manual work by 15 hours/week.
- Client: Symrise
Data Engineer/Administrator
Pulaska Savings Bank
Chicago
01.2022 - 01.2023
- Modernized 15+ legacy SQL databases to Amazon Aurora using AWS DMS, achieving zero‑data‑loss cutovers and a 60% performance boost.
- Led Oracle‑to‑PostgreSQL migration, reducing annual licensing costs by $120K and improving system efficiency by 65%.
- Implemented PostgreSQL/Aurora backup & recovery strategies including automated snapshots, PITR, and cross‑region replication.
- Resolved complex database incidents through root cause analysis and long-term remediation, enhancing HIPAA compliance by implementing Secrets Manager and KMS to eliminate access risks and secure sensitive data.
- Contracted with Bereans IT to provide database administration and engineering support.
Database Administrator
Symrise
Teterboro
01.2017 - 01.2022
- Managed 50+ RDS/Aurora environments with 99.99% uptime, automated Terraform provisioning for 60+ deployments, reduced query latency by 40% using Performance Insights, and implemented Multi‑AZ/cross‑region HA/DR for continuous availability.
- Delivered IT services under contract with Bereans IT, ensuring client needs were met effectively and efficiently.
Education
Bachelor of Science - General Studies
Rutgers, University
Newark, NJ01-2012
Associate’s degree -
Essex County College
Newark, NJ01-2009
Skills
- Data Pipeline Development
- ETL engineering
- ETL workflows
- Data Lake Architecture
- Data warehousing
- Pipeline design
- Pipeline development
- Database Design
- Database architecture
- Query optimization
- Database tuning
- Indexing strategies
- Performance tuning
- Data storage
- Infrastructure automation
- Terraform automation
- Cloud troubleshooting
- System optimization
- Security compliance
- Root cause analysis
- Data security
Certification
- Certified Data Engineer, AWS, 01/01/25
- Terraform Associate, HarshiCorp, 01/01/25
Professional Overview
Senior Data Engineer experienced in AWS database administration, managing and optimizing MySQL, PostgreSQL, and Redis across on‑prem and cloud environments. Skilled in RDS/Aurora performance tuning, replication, high‑availability design, CloudWatch/Datadog monitoring, Terraform/CloudFormation automation, backup/DR strategy, and SQL/Python‑based troubleshooting to ensure reliable, secure, and scalable database operations.
Professional Development
PostgreSQL for Amazon Aurora and Amazon RDS – Advance concept, Knowledge Batch Readiness Path, AWS, 01/01/26
Timeline
Data Engineer
Bereans Information Technology
01.2023 - 01.2026
Data Engineer/Administrator
Pulaska Savings Bank
01.2022 - 01.2023
Database Administrator
Symrise
01.2017 - 01.2022
Bachelor of Science - General Studies
Rutgers, University
Associate’s degree -
Essex County College