About me

Photo of Ambrosio “Butch” U. Mahinay

Ambrosio “Butch” U. Mahinay, MPA

Public Administration Specialist · Local Treasury Practitioner · Civic Tech Developer

I am a public administration practitioner, author, and self-taught software developer in Quezon Province, Philippines, with over 15 years in government service, more than 13 of them in local treasury work since April 2013, covering disbursement, collection, supervision, treasury operations, and fiscal management.

Through aumahinay.dev, I write about public finance workflows, publish educational tutorials on civil service and treasury competencies, build practical software utilities using Python and modern web technologies, and share reflections from my three-hectare fruit farm in Quezon.

My career sits at the intersection of local treasury administration and digital transformation. Rather than viewing public administration and software engineering as separate disciplines, I focus on how simple, deterministic code and well-structured relational databases can eliminate repetitive spreadsheet work, prevent manual transposition errors, and strengthen 360-degree public accountability.

Professional Background

Local Treasury Administration

April 2013 – Present
  • Role: Career Local Treasury Practitioner · Quezon Province
  • Focus areas: Disbursement, collection, supervision, treasury operations, and fiscal management. I handle public money from both sides: receiving and accounting for collections, and paying out disbursements correctly and on time. I also supervise treasury staff and keep the daily work of the office running smoothly, all in support of sound fiscal management for the local government.

Municipal Treasury Leadership

2020 – 2022 and 2024 – Present
  • Role: Designated Acting Municipal Treasurer (Various Assignments) · Quezon Province
  • Focus areas: Led municipal treasury operations across multiple local government assignments, overseeing disbursement, collection, supervision of treasury staff, and fiscal management in accordance with the Local Government Code of 1991 (RA 7160) and BLGF standards.

Academic Instruction & National Capacity Building

Prior roles
  • Role: Part-Time College Lecturer & National Gender and Development (GAD) Trainer
  • Focus areas: Taught public administration courses at the collegiate level for one semester and served for three years as a National GAD Trainer, facilitating policy and capacity-building workshops for public sector institutions.

Education

  • Master in Public Administration (MPA)
    Manuel S. Enverga University Foundation, Lucena City
  • Bachelor of Science in Public Administration (BSPA)

Eligibilities

  • Intermediate Competency in Local Treasury Examination (ICLTE) – 2019
  • Basic Competency in Local Treasury Examination (BCLTE) – 2018
  • Career Service Professional Eligibility – 2012

Microcredentials

Google Career Certificates earned on Coursera. Each one links to its Coursera verification page.

  • Google IT Support Professional Certificate
    Coursera · Oct 2026 · 5 courses · Verify
  • Google Data Analytics Professional Certificate
    Coursera · Jun 2026 · 9 courses · Verify
  • Google AI Professional Certificate
    Coursera · Feb 2026 · 7 courses · Verify
  • Google Business Intelligence Professional Certificate
    Coursera · Jan 2026 · 4 courses · Verify
  • Google Advanced Data Analytics Professional Certificate
    Coursera · Dec 2025 · 7 courses · Verify
  • Google Cybersecurity Professional Certificate
    Coursera · Jun 2025 · 9 courses · Verify
  • Google Project Management Professional Certificate
    Coursera · Jun 2025 · 7 courses · Verify
  • Google Stakeholder Management Specialization
    Coursera · Jul 2026 · 3 courses · Verify
  • Google AI Essentials Specialization
    Coursera · May 2026 · 5 courses · Verify
  • Google People Management Essentials Specialization
    Coursera · May 2026 · 4 courses · Verify

Independent Technical Work

Outside of official working hours, I design and maintain independent software projects, including the Automated Local Treasury Operations System (ALTOS), and author practical guides such as 360° Accountability. My technical work automates the preparation and verification of Reports of Collections and Deposits (RCD), RAAF, CRAAF, and Real Property Tax tracking using offline-first, audit-ready architectures.

Development stack

Technologies & Databases
Python (Tkinter, Pandas, ReportLab)SQLiteSQL
Frontend & Web
ReactViteTailwind CSS
Cloud & Deployment
Firebase/FirestoreCloudflare Pages

Writing, Tutorials & Knowledge Sharing

I publish weekly Sunday articles on aumahinay.dev and produce English-language educational topics covering public administration, Real Property Tax compliance, local treasury operations, and Python automation for public finance learners and civil service examinees.

Beyond the Desk

When I am not writing code or reviewing public finance frameworks, I take time whenever my schedule allows to ride my motorcycle through the backroads of Quezon Province and manage my three-hectare farm, planted with coconut, banana, mango, santol, and jackfruit (langka), alongside stands of native mulawin (molave) trees.

Contact

For speaking inquiries, book feedback, or technical discussions on civic tech and data analytics: