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From operations to software.

I’m Andrew Herrera. I work directly with operators to turn their workflows into usable systems.

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A PC-12 on a three-dimensional runway in late-afternoon light.
Aviation · operating experience and FetchOS

Understand the work. Build the system.

FetchOS. Software from the operating floor.

Before defining the product, I helped launch the operation. That experience defined what the team needed to quote, book and manage the aircraft.

Direct operating responsibility

As cofounder, COO and pilot of Fetch Air / Tryp Air Charter, I helped acquire the Part 135 operator, prepare the launch aircraft, and standardize training.

October 2024–April 2026

What I led for launch

I spearheaded the development of FetchOS, the platform the sales team used to quote, book and manage the aircraft from launch day. I worked directly with the company’s sole software engineer. I turned operating friction into specs and acceptance criteria, defined the customer, pilot and aircraft-owner portals, and tested each feature as it shipped.

Read my aviation record
See responsibilities and datesContinue to energy

The workflow defines the system.

At Petromex, I translated commercial procedures into workflows, transition rules, and connected records: PetraOS.

The original tanker entering a loading bay in a three-dimensional fuel terminal.
PetraOS · deployed platform · illustrative scene, no government affiliation

Behind every movement is a decision.

PetraOS. Turning the operation into rules.

The tanker establishes the context. The work is in the system: understanding Petromex’s procedures, defining controls, and connecting its commercial operation to evidence.

From discovery to deployment

Technology consulting and product development since March 2026. Direct workflow discovery; design, implementation, and deployment using AI-assisted development.

Deployment confirmed by the author · ongoing development · private source

A rule you can inspect

QUALIFIEDCONTRACTED

Without approved KYC, the system blocks the move to contract. The decision does not depend on how a button looks: transition rules enforce it.

Try the rule with synthetic data
Read the full PetraOS case studyContinue to construction

Coordinate before building.

From drawings to components. A shared model for understanding relationships, quantities and construction decisions.

A two-storey residential model based on drawings, with framing, openings, balconies and roofs.
Groma / Minera · modules in development · illustrative model and planning

From physical operations to verifiable decisions.

Groma and Minera. From drawings to reviewable decisions.

I translate estimating practices and the family firm’s field knowledge into product requirements and structured models, using AI-assisted development.

Quantities linked to their source

Groma has implemented drywall extraction, review, and estimating modules. They connect geometry, assemblies, and quantities; an estimator must inspect the source, resolve ambiguity, and accept the result.

Inspect the Groma case

What the model demonstrates

Minera has plan-based models and implemented operational modules. The house shown is a source-informed visualization with interpretive finishes—not a validated BIM or a completed 5D integration.

See Minera’s scope

Private repositories · human review required · Groma–Minera integration in development

Inspect a sample quantityContinue to the project overview

The operation is the starting point.

My work connects operating experience, discovery with users, and AI-assisted product development. Each project distinguishes my contribution, what works, and what remains in development.

Aviation & FetchOS

I cofounded Fetch Air, flew its PC-12NG and spearheaded the development of FetchOS, turning scheduling, sales and cockpit friction into specs, tests and shipped features with the company’s engineer.

Explore my role and experience

PetraOS

From discovering Petromex’s procedures to designing, building, and deploying an operating platform. Documented rules, technical decisions, and limitations.

Read the PetraOS case study

Groma & Minera

Tools connecting drawings, quantities, and human review. Implemented modules with the integration between systems still in development.

Read the Groma case study
Andrew Herrera on the apron.

Andrew Rosario Herrera

Commercial pilot, cofounder, and product builder. Working between Mexico and the United States to turn operational needs into usable systems.

About my background

Let’s talk about what your operation needs.

andrew@aherrera.us