---
title: "Staff"
description: "Stem Cells Transplant Institute Staff Behind every treatment at the Stem Cells Transplant Institute is a dedicated team of specialists who believe in combining science with empathy to improve lives. Dr Leslie Mesen Founder Dr. Leslie Mesen, the visionary founder of the Stem Cells Transplant Institute in San Jose, Costa Rica, specialized in treating human […]"
url: "https://stemcellstransplantinstitute.com/staff/"
date_modified: "2026-08-16T14:08:27-06:00"
---

# Stem Cells Transplant Institute Staff

Behind every treatment at the Stem Cells Transplant Institute is a dedicated team of specialists who believe in combining science with empathy to improve lives.

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![Dr Leslie Mesen](https://stemcellstransplantinstitute.com/wp-content/uploads/2018/11/Dr-Leslie-Mesen-Stem-cells-transplant-institute.jpg)

### Dr Leslie Mesen

Founder

Dr. Leslie Mesen, the visionary founder of the Stem Cells Transplant Institute in San Jose, Costa Rica, specialized in treating human diseases with mesenchymal stem cells. He also co-founded the Anti-Aging and Wellness Clinic, leading its expansion to multiple countries across America.

Dr. Mesen was widely recognized for his contributions to healthcare, earning numerous awards and honors throughout his career. He held three PhDs, underscoring his deep commitment to medical research and innovation.

His dedication to patient care and medical excellence laid the foundation for both the Stem Cells Transplant Institute and the Anti-Aging and Wellness Clinic. Dr. Mesen’s legacy continues to inspire our work, focusing on improving patients’ quality of life through cutting-edge research and personalized care. Though he is no longer with us, his spirit remains at the heart of our mission.

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## Staff

![Sebastián Mesen](https://stemcellstransplantinstitute.com/wp-content/uploads/2026/06/Sebastian-M.jpg)

### Sebastián Mesen

CEO

![Dr. Heidy Chaves](https://stemcellstransplantinstitute.com/wp-content/uploads/2026/04/Dr-Heidy-Chaves.jpg)

### Dr. Heidy Chaves

Medical Officer

![Dr. Andres Alpizar MQC](https://stemcellstransplantinstitute.com/wp-content/uploads/2024/07/Andres-Alpizar.jpg)

### Dr. Andres Alpizar MQC

Chief Laboratory Manager

![Jose Mesén](https://stemcellstransplantinstitute.com/wp-content/uploads/2026/04/Jose-Mesen-M.jpg)

### Jose Mesén

Laboratory & Clinical Operations Director

![Priscilla Arroyo, RN](https://stemcellstransplantinstitute.com/wp-content/uploads/2025/10/Priscilla.jpg)

### Priscilla Arroyo, RN

Chief Nursing Officer

![Ronald Alvarado](https://stemcellstransplantinstitute.com/wp-content/uploads/2024/07/Ronald-Alvarado.jpg)

### Ronald Alvarado

Chief Sterile Processing Technician

![Iony Madrigal](https://stemcellstransplantinstitute.com/wp-content/uploads/2024/07/Iony-Madrigal.jpg)

### Iony Madrigal

Patient Coordinator

![Jose Castro](https://stemcellstransplantinstitute.com/wp-content/uploads/2025/09/jose-castro.jpg)

### Jose Castro

Patient Coordinator

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### Location

San José, Costa Rica

### Contact Us

info@stemcellstransplantinstitute.com

### Call US

+1 888 785-4170

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