I began my programming career in 1998, starting with mainframe systems and continuously learning to evolve with technology. My hands-on experience spans designing and building robust business solutions and databases, often reverse-engineering legacy systems to modernize and optimize them for today’s technology. I transform Excel flat tables into robust SQL models, design and implement databases across Access, SQL Server, and MySQL, and build Windows desktop apps and web solutions using Visual Basic, C#, ASP.NET Razor Pages, CakePHP, HTML/CSS/JS. I thrive both independently and in large teams, on-site or remote, and I value clear technical documentation and automation — including VBA-powered processes that helped shape this resume.…

Gustavo Miller

I began my programming career in 1998, starting with mainframe systems and continuously learning to evolve with technology. My hands-on experience spans designing and building robust business solutions and databases, often reverse-engineering legacy systems to modernize and optimize them for today’s technology. I transform Excel flat tables into robust SQL models, design and implement databases across Access, SQL Server, and MySQL, and build Windows desktop apps and web solutions using Visual Basic, C#, ASP.NET Razor Pages, CakePHP, HTML/CSS/JS. I thrive both independently and in large teams, on-site or remote, and I value clear technical documentation and automation — including VBA-powered processes that helped shape this resume.…

Available to hire

I began my programming career in 1998, starting with mainframe systems and continuously learning to evolve with technology. My hands-on experience spans designing and building robust business solutions and databases, often reverse-engineering legacy systems to modernize and optimize them for today’s technology.

I transform Excel flat tables into robust SQL models, design and implement databases across Access, SQL Server, and MySQL, and build Windows desktop apps and web solutions using Visual Basic, C#, ASP.NET Razor Pages, CakePHP, HTML/CSS/JS. I thrive both independently and in large teams, on-site or remote, and I value clear technical documentation and automation — including VBA-powered processes that helped shape this resume.

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Skills

Experience Level

ASP.NET
Expert
XML
Expert
Microsoft Excel
Expert
JavaScript
Expert
HTML5
Expert
Bootstrap
Expert
.NET
Expert
C#
Expert
Microsoft SQL
Expert
SQL
Expert
GitHub
Expert
TypeScript
Expert
Azure
Expert
jQuery
Expert
Power BI
Expert
Oracle
Expert
SharePoint
Expert
Jira
Intermediate
MySQL
Intermediate
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Language

English
Fluent

Work Experience

Systems Analyst / Database Modeler (SQL) at New Connections Ministries (NCM)
October 1, 2025 - Present
Upgraded the organization’s website architecture by migrating to ASP.NET Core 8, improving performance and security. Established a DevOps repository for centralized collaboration and code management, and implemented Continuous Deployment to support rapid, consistent releases. Updated site content and removed unused pages to streamline navigation.
Senior Systems Analyst / Database Modeler (SQL) at Shared Services Canada (SSC)
April 1, 2025 - October 1, 2025
Led the transformation of legacy Excel-based applications (Task and Financial Authorization, Project Control Workbook) toward a modern platform using Power Apps and Power Automate. Reviewed VB code for migration to Power Fx, designed data entry and forecasting Power Apps canvas app, analyzed M-code and database standards, and architected a relational database in SharePoint/Dataverse with indexing and integrity constraints.
Senior Business Analyst – Database Modeler (SQL) at Department of National Defense (DND)
August 1, 2023 - February 1, 2025
Refactored the QAIS database to enforce referential integrity and missing relationships; added indexes and optimized queries, improving performance by ~70%. Implemented EF ORM for .NET data modeling, modernized multi-tier architecture with unit-of-work patterns, and automated tasks via Power Automate. Modernized reporting through OOXML integration and VBA-based data handling.
Senior Business Analyst / Database Modeler at New Connections Ministries (NCM)
July 1, 2023 - August 1, 2023
Expanded core functionality and optimized intake processes, implementing a new intake application form, supporting database tables, and multi-tier architecture with Separation of Concerns. Updated EF mappings, added SQL constraints, implemented email-based error reporting, and used OpenXML to generate structured intake documents.
Senior Business Analyst / Database Modeler at Shared Services Canada (SSC)
February 1, 2023 - July 1, 2023
Migrated data from Excel to SQL Azure for the Lessons Learned Master Database project. Normalized the schema and created Azure SQL tables, relationships, and constraints. Built a prototype PowerApps/Power BI solution for 300 users, automated data retrieval via flows and data transformations, and documented processes with diagrams and use cases.
Senior Business Analyst / Database Modeler at New Connections Ministries (NCM)
September 1, 2022 - January 1, 2023
Board member driving web app modernization: ASP.NET Core Razor Pages with Bootstrap 4.0, reCAPTCHA, and secure authentication via ASP.NET Core Identity. Implemented Repository and Unit of Work patterns with EF Core, deployed to Windows Server 2016 with SQL Server 2019 and IIS 10, and enhanced data validation through LINQ and Fluent API.
Systems Analyst / Senior Developer / Database Modeler at Shared Services Canada (SSC)
March 1, 2021 - September 1, 2022
Redesigned BR Costing and Network Trackers: migrated from Access to SQL Server 2012-2016, normalized 85 tables, and implemented referential integrity. Automated data retrieval from Jira, migrated data to SharePoint, and contributed to web-based solutions using PHP with CakePHP, MySQL Oracle, and Azure DevOps.
Systems Analyst / Senior Developer / Database Modeler at Department of National Defense (DND)
February 1, 2017 - February 1, 2021
Redesigned business planning database; migrated from Access to SQL Server 2012 and SharePoint-based modular components. Normalized schema, eliminated redundancy, and implemented Ribbon UI with XML and embedded help. Created Excel/Word macros for reporting and data entry; preserved project IDs during updates for reporting accuracy.

Education

Computer Science Diploma at Lima, Peru
January 1, 1985 - January 5, 2026
Coding Bootcamp at Carleton University
January 1, 2024 - January 5, 2026

Qualifications

Top Secret Clearance – Classified
February 1, 2023 - July 1, 2023
Secret Clearance – Protected B
February 1, 2017 - February 1, 2021

Industry Experience

Government, Non-Profit Organization, Professional Services, Software & Internet, Education
    paper Personal ASP.Net Website

    Developing and designing a new Website or Desktop application involves several key steps and considerations. In this example, I highlight the use of ASP.NET 8 MVC and SQL Server.

    The process begins by defining the project scope and identifying the target audience to ensure the solution meets user needs. Wireframes and mockups help visualize layout and design. Once finalized, the front-end is built with HTML, CSS, and JavaScript, while the database schema is designed to organize data efficiently. The back-end is implemented using ASP.NET MVC, connected to SQL Server for robust data management. Finally, the application is tested for functionality, usability, and security before launch. Ongoing maintenance and updates are essential to keep the system reliable.

    Visit my website to read more at https://www.twine.net/signin

    paper New Connections Ministries

    In 1998 New Connections Ministries (NCM) was established as an outreach to men in prisons across Eastern Ontario. These initial contacts soon led to providing follow-up, upon their release into the community, and to ministering to the families of these men. It became clear that many of the men to whom we were ministering, were struggling with addictions to alcohol, drugs and sexual immorality. Please visit the website to learn more.

    I am a member of the board of directors and in charge of the website and other administration forms not available to the community.