Company

Healthcare engineering specialists. Since 1995.

We build and maintain mission-critical systems for healthcare administrations. Today we apply that same rigour to data, AI and enterprise SaaS platforms for new verticals.

1995 → 2026

Thirty years on one course.

19952026

1995

GESI founded in Seville. First project: a radiological information system for Servicio Andaluz de Salud.

Years 2000

That system became a structural pillar of SAS. The long-term relationship with public healthcare administration begins.

Years 2010

Development and deployment of the breast cancer oncology screening platform. Consolidation as the leading provider of public healthcare IT in Andalusia.

2019

Transition to 100% remote operations. Almost a year before the pandemic transformed the sector's way of working.

2023

Opening of new lines: clinical data engineering, AI integration, enterprise-grade SaaS platforms.

2024

Dual certification: ISO 27001 and ISO/IEC 33000.

2026

ENS Nivel Alto accreditation.

1995 — 2026

This is not the story of a company that changes direction every year. It is the story of one that has preferred to grow better rather than grow bigger.

In production

Public healthcare, at scale, for decades.

9.858.942

people treated

current population under coverage

hospitals

Health Agencies

districts

147.000

active healthcare professionals

Team

The people who make this work.

At GESI, every team member is senior and specialist. Public healthcare IT has a long learning curve — you don't arrive here in passing. We nurture team stability because accumulated knowledge is part of the service we deliver.

These are the figures who coordinate the main lines. We'll introduce you to the rest of the team when we talk.

Esther Carnerero Martín

Chief Executive Officer

Irene González Huelva

DevOps Lead

Javier Pozo Morales

Healthcare Lead

José Cordero Bermúdez-Coronel

Quality and Security Lead

Accreditations

Three accreditations that back how we work.

Each one covers a different area and all three are audited regularly by independent bodies. They are not badges obtained once — they are maintained, renewed and can be verified.

ISO/IEC 33000 — Software process quality

The international family of standards that evaluates how software is developed. It does not evaluate the final product — it evaluates the process: how it is planned, how it is reviewed, how it is validated and how it is delivered. An external auditor checks our processes against the standard and issues the certificate.

For a client it means: that quality does not depend on who is available that day. Our processes are traceable, repeatable and measurable — what we deliver, we deliver the same way the first time as the hundredth.

Vista previa del certificado ISO/IEC 33000 — Calidad de procesos software

Download certificate (PDF)

ISO 27001 — Information Security Management System

The international reference standard for managing information security. It covers security policy, technical and organisational controls, continuous risk management and annual external audit. It is not a static photograph — it is a management system that is reviewed and improved continuously.

For a client it means: that the information entering our systems is protected according to the most internationally recognised standard. And there is documentation to prove it.

Vista previa del certificado ISO 27001 — Sistema de Gestión de Seguridad de la Información

Download certificate (PDF)

ENS Nivel Alto — National Cybersecurity Scheme

The most demanding category that Spanish public administration establishes for providers handling sensitive information. Obtaining it requires exhaustive audit of the entire cycle — development, deployment, operation and support — and proof that each phase meets the security requirements set by the National Cryptology Centre.

For a client it means: that we can work with systems in the High category without accreditation being a limiting factor. It is a requirement that many public projects demand and that very few providers of our size can demonstrate.

Vista previa del certificado ENS Nivel Alto — Esquema Nacional de Seguridad

Download certificate (PDF)

Culture

How we work here.

Deep team, not large.

Every person is senior and a specialist. There is no junior profile who can integrate alone into the complexity of the sector, so we invest in genuine mentorship. It is a slow and demanding model, and it is the only way to sustain mission-critical systems without losing accumulated knowledge.

Learning from mistakes.

Mistakes are not hidden — they are analysed and we learn from them. When something goes wrong, the question is not who did it but what we can improve. That culture is what allows a small team to sustain mission-critical systems for decades without repeating the same problems.

People and team.

The team is made up of people and each brings something different. We believe in honest collaboration, in direct communication and in the fact that the diversity of experiences and perspectives makes the work better.

REDI: Business Network for LGBTI Diversity and Inclusion.

We have been part of it for several years. It is an active decision, not a badge in the footer. A small company has to consciously decide what kind of workspace it builds.

Agreements with universities and vocational training centres.

We maintain internship agreements with several institutions because the next generation of healthcare IT is also our responsibility. And because sometimes the person who comes as an intern stays.

Commitment to excellence.

Things must not only be done, but done well. That means questioning, improving and not settling for something that works if it can work better. And applying it both to the work and to how we relate to clients and each other.

100% remote work since 2019.

Not for fashion and not because of the pandemic — we started a year before the rest of the sector. We understood it earlier: the best technical talent in healthcare IT in Spain does not necessarily live in Seville. We keep the office; the team works from wherever they want.

Let's talk?

If you are running a healthcare IT project, a clinical data programme, or you are thinking about an enterprise SaaS platform that you want to build with rigour — tell us about it. If you want to join the team, say so too. We are usually interested in people, even if there is no open position at that moment.

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