Summary
Overview
Work history
Education
Skills
Interests
Timeline
Generic

Gareth Cousins

Rathcoole,Belfast

Summary

Highly analytical professional with over 15 years of experience in the energy industry, adept at leveraging data and system configuration to drive business outcomes. I began my career as an administrator and, through self-taught learning and on-the-job development, progressed to become a QlikView Developer, data analyst, and systems configurator. I have specialised in building sophisticated data pipelines and creating insightful reports and dashboards using SQL, QlikView, and Power BI. My deep understanding of billing and rate management within the energy sector, including hands-on experience configuring products, UI maps, and business rules in Oracle CC&B, provides me with a strong commercial awareness of the direct costs and revenues that influence energy retail.

Overview

26
26
years of professional experience
2004
2004
years of post-secondary education

Work history

QlikView Developer / Analyst

Energia Utilities
Belfast, Belfast
03.2015 - 08.2025
  • Played a key role in expanding the QlikView development team's capabilities.
  • Developed QlikView & Power BI apps for various departments within the company.
  • Performed front-end development using Oracle technologies, HTML, JavaScript, and PowerShell.
  • Extracted, transformed, and loaded data to create insightful visual dashboards.
  • Created ad-hoc SQL scripts and stored procedures for reporting and data manipulation.
  • Debugged system errors and provided effective solutions.
  • Analysed market data and customer trends to identify opportunities for product development and pricing strategies.
  • Key Achievements
  • Developed an integrated QlikView application combining payments, credits, invoices, and adjustments into a single visual report for SAP revenue posting.
  • Automated SAP posting preparation using VBS to export QlikView tables into pre-formatted upload files.
  • Automated recurring financial report production using BAT & Windows Scheduler to run SQLcl scripts, consolidate CSV outputs via VBA, and save reports for team access.
  • Built a VBA billing validation tool for high-value energy users to ensure accurate billing.
  • Streamlined PEPPOL E-invoicing with PL/SQL automation.
  • Mentored colleagues in SQL and QlikView best practices.

Accounts Billing Administrator

Energia Utilities
01.2009 - 03.2015
  • Processed market messages and maintained accurate billing for 100k+ customers.
  • Created process documentation to improve efficiency and ensure regulatory compliance.
  • Configured products using market-driven rates and analysed customer data to inform billing strategy.

Department Manager

Matalan
02.2008 - 12.2008
  • Managed a team of 5, overseeing stock, budgets, and department operations.
  • Delivered staff training and supported operational compliance.

HR Payroll Clerk

Royal Navy
03.2001 - 02.2008
  • Completed leadership and payroll training; processed accurate payroll consistently.
  • Led teams and acted as supervisor when required, earning promotion.

Sales Assistant / Stockroom Manager

H & S Stores
09.1999 - 02.2001
  • Managed stock ordering and general store duties.

Education

NVQ Level 2 - Administration

Royal Navy

7 GCSEs - undefined

St John’s Baptist School

Skills

  • Data Analysis & Reporting
  • SQL / PL/SQL
  • Systems Configuration (Oracle CC&B)
  • QlikView / Power BI
  • ETL & Data Modelling
  • VBA / VBS
  • Financial & Billing Processes
  • Oracle SQLcl
  • Automation & Scripting
  • BAT / Windows Scheduler
  • Stakeholder Engagement
  • Excel (Advanced)
  • Regulatory & Policy Awareness (NI & ROI)
  • HTML / JavaScript / PowerShell

Interests

  • Family
  • DIY
  • Sports

Timeline

QlikView Developer / Analyst

Energia Utilities
03.2015 - 08.2025

Accounts Billing Administrator

Energia Utilities
01.2009 - 03.2015

Department Manager

Matalan
02.2008 - 12.2008

HR Payroll Clerk

Royal Navy
03.2001 - 02.2008

Sales Assistant / Stockroom Manager

H & S Stores
09.1999 - 02.2001

7 GCSEs - undefined

St John’s Baptist School

NVQ Level 2 - Administration

Royal Navy
Gareth Cousins