Open to opportunities

Brian O'Connor

@brianoconnor

Message

I am a data analyst specializing in scalable ETL, analytics, and reporting with 16+ years' experienc

Ireland

Message

What I'm looking for

I seek senior analytics roles where I can build scalable ETL and reporting systems, drive cross-functional decisions, mentor analysts, and contribute to data governance and privacy initiatives.

I am a Data Analyst with 16+ years of experience building analytics, ETL pipelines, and scalable reporting solutions for product, engineering, and operations teams.

At Meta, I led the migration of five legacy reporting systems into unified analytics frameworks post-reorg, delivering 25+ Unidash dashboards and 250+ reusable Metrics360 KPIs to enable self-service analytics.

I design scalable ETL pipelines and data models using Dataswarm, Hive, and Presto to unify disparate operational data for forecasting, SLA tracking, and revenue attribution, and I created Support Funnel and Quality dashboards to surface bottlenecks for leadership.

I automated Tableau dashboards to cut load times by 80% and improve update cadence, built executive scorecards for VP-level reporting, mentored analysts through onboarding and SQL training, and contributed extensively to privacy and compliance initiatives.

Prior roles in the financial sector and at Groupon strengthened my expertise in risk modeling, forecasting, and data marts; I hold a Postgraduate Diploma in Computing (Data Analytics) and bring a pragmatic, metrics-driven approach to solving complex analytical problems.

Experience

Work history, roles, and key accomplishments

Current

Data Analyst

Current

BI & Visualization Analyst

Facebook

Mar 2017 - Nov 2017 (8 months)

Developed operational dashboards for International Field IT teams to enable proactive workload balancing and performance optimization. Delivered the first comprehensive data view of task management across multiple regions, enabling data-driven decisions by visualizing service demand, resource allocation, and productivity trends.

Dashboards Data Visualization Performance Optimization Data Analysis Resource Allocation

Risk Data Analyst

AIB

Apr 2016 - Mar 2017 (11 months)

Led data acquisition and transformation for IFRS9 and credit risk modelling. Supported loan default modeling, account linkage analysis, and executive MI reporting.

Risk Modeling

Operations Analyst, Affiliate Marketing

Groupon

Jul 2015 - Apr 2016 (9 months)

Built data marts and forecasting models using Holt-Winters techniques in R. Analyzed 30M+ web sessions using Hadoop and visualized user flows in R Shiny.

Data Marts Forecast Modelling R Hadoop R Shiny Web Analytics Campaign Optimization

Senior Analyst / Database Developer / Assistant Manager

AIB

Oct 2009 - Jul 2015 (5 years 9 months)

Designed normalized data models and managed MI reporting pipelines for Collections. Served as SME for enterprise data warehouse transformation and governance initiatives.

Data Modeling Data Warehouse Data Governance Database Development SQL