We are a cutting-edge development and manufacturing facility specializing in cellular therapeutics and biologics.

About Us

MISSION

Signature Biologics’ mission is to use innovative techniques to manufacture human cellular and biologic products. Proven through rigorous scientific and clinical study, we provide best-in-class development and manufacturing facilities to support production of cellular therapeutics that enhance patients’ lives.

VISION

Born from decades of international leadership, Signature Biologics’ vision is to become the premier, trusted source of cellular and biologic therapeutic solutions for the globe, characterized by the highest manufacturing standards.

Our Core Values

Innovation

A constant focus on research to develop novel and unique processes to manufacture best-in-class products.

Quality

Commitment to complying with the highest regulatory standards to ensure products consistently meet established specifications.

Integrity

We conduct all operations with the utmost commitment to transparency, trustworthiness and golden rule ethics.

Laboratory Certifications

Certified Quality Management
System

ISO 9001:2015 specifies requirements for a quality management system when an organization needs to demonstrate an ability to consistently provide products and services that meet customer and regulatory standards. Signature Biologics’ quality management system is ISO certified and surpasses regulatory requirements to meet our own high quality standards.

Accredited Tissue
Bank

The American Association of Tissue Banks (AATB) is a professional, non-profit, scientific and educational organization that requires a rigorous set of criteria be met for AATB-accreditation. Signature Biologics is accredited for numerous tissue processing techniques and procedures. Our accreditation number and list of accreditations can be found by clicking the link below.

Standards Process
Controls

Current Good Manufacturing Practices (cGMP) and Current Good Tissue Practice (cGTP) employed at Signature Biologics assure that the products are of consistent quality, free from contamination, and protect the recipient from harm. These practices also ensure that staff is well trained, documentation is thorough, and numerous quality checks are performed during the manufacturing process.

LEADERSHIP TEAM

Dr. Neil Riordan

CEO

PhD in Health Sciences from the Medical University of the Americas

Founded Signature Biologics in 2018 with more than 30 years of experience in applied stem cell research.

One of the earliest pioneer and expert in applied stem cell research and founder of 5 intercontinental companies that specialize in various biomedical products ranging from the use of adult stem cells in Panama to human umbilical cord tissue products produced in the US.

Angelica Rivas

Chief Manufacturing Officer

BS in Biotechnology from Universidad San Martin de Panama; MBA in Project Management Universidad Latina de Panama

Joined Signature Biologics in 2018 and is responsible for laboratory manufacturing operations and compliance with applicable regulations and standards.

Over 10 years in the regenerative medicine industry using adult stem cells starting in MediStem Panama, working in the Production Department as a Laboratory Technician and Cell Line Coordinator. Well experienced in implementation of Quality Management System (QMS) after 6 years in MediStem Panama in the role of Quality Assurance.

Jason Martinez

Chief Of Staff

BS in Business Administration from University of North Texas
Joined Signature Biologics in 2024 and plays a strategic and operational role, acting a key partner to the CEO and the leadership team.

With over 20 years of experience in business operations and business leadership, Jason Martinez has a proven track record of driving organizational growth and efficiency. Previously, Jason held executive leadership roles at a large national insurance brokerage and was executive leadership in the highest grossing human capital agency in Fort Worth.

Carlos Paz

Director of R&D

BS Chemistry emphasis Biochemistry, San Diego State University; PhD Cell and Molecular Biology, Pharmacology track, University of Texas Southwestern Medical Center

Joined Signature Biologics in 2021 and is responsible for Research and Development, leading efforts in MSC-based therapy development, including analytical development, process optimization, and technology transfer to support regulatory approval.

Over 10 years of experience in life sciences research specializing in early discovery and pre-clinical research in the fields of molecular biology and regenerative medicine.

Scott Tran

Director of Lab Manufacturing

B.S. and M.S. in Biomedical Engineering from Mississippi State University
Joined Signature Biologics in 2024 and is responsible for laboratory manufacturing operations.
Over 14 years of experience in R&D, process development, and cGMP manufacturing operations of biological products. Dedicated leader with a track record of streamlining operations, promoting continuous improvement, and driving alignment across teams.

Elena Toth

Director of Clinical Development

Bachelor of Engineering in Biomedical/Medical Engineering, University of Limerick; PhD, Bioengineering and Biomedical Engineering, Trinity College Dublin

Joined Signature Biologics in 2020 and leads development of clinical programs to support clinical translation of therapeutic assets towards the commercial pathway and provides regulatory support to CRO partners.

My experience spans the spectrum of drug development, from research to process and analytical development, clinical translation, and regulatory submission. I have therapeutic experience in orthopaedics (osteoarthritis and tendonitis), auto-immune (rheumatoid arthritis, dermatomyositis) and rare diseases (Duchenne Muscular Dystrophy, Friedreich’s Ataxia).

Jim Lucas

Director of Facilities & IT

BS in Computer Information Systems from National American University

Joined Signature Biologics in 2021 and is responsible for Facilities and IT

Over 10 years Facilities and 36 years IT experience. Experienced in HVAC, electrical, plumbing, pest control and physical controlled access in a clean room environment. I have extensive management/leadership training in Total Quality Management Systems (TQMS) as well as Ken Blanchard’s situational leadership style.  I have worked in biotechnology, healthcare, financial, government, retail, education, logistics as well as nonprofit environments.

Alan Enamorado

Senior Supply Chain Manager

Jarrod Ponce

Manufacturing Supervisor

Omar Jamal

General Lab Supervisor

Ana Chaves

R&D Laboratory Manager

Sophia Hines

Project Manager

MEET OUR FOUNDER

Neil Riordan, PA, PhD is one of the early pioneers and experts in applied stem cell research. Dr. Riordan founded publicly traded company Medistem Laboratories (later Medistem Inc.) which was acquired by Intrexon in 2013. He is the founder and chairman of Medistem Panama, Inc., a leading stem cell laboratory and research facility located in the Technology Park of the prestigious City of Knowledge in Panama City, Panama. Medistem Panama (est. 2007) is at the forefront of research on the effects of adult stem cells on the course of several chronic diseases and conditions. The stem cell laboratory at Medistem Panama is fully licensed by the Ministry of Health of Panama.

He is co-founder and chief science officer of the Riordan Medical Institute (RMI). Located in the Dallas-Fort Worth area city of Southlake, Texas, RMI specializes in the treatment of orthopedic conditions with autologous bone marrow-derived stem cells combined with amniotic tissue products developed by Dr. Riordan.

He is also the founder of Aidan Products, which provides health care professionals with quality nutraceuticals. Dr. Riordan’s team developed the product Stem-Kine, the only nutritional supplement that is clinically proven to increase the amount of circulating stem cells in the body for an extended period of time. Stem-Kine is currently sold in 35 countries.

Dr. Riordan has published more than 70 scientific articles in international peer-reviewed journals. In the stem cell arena, his colleagues and he have published more than 20 articles on multiple sclerosis, spinal cord injury, heart failure, rheumatoid arthritis, Duchenne muscular dystrophy, autism, and Charcot-Marie-Tooth syndrome. In 2007, Dr. Riordan’s research team was the first to discover and document the existence of mesenchymal-like stem cells in menstrual blood. For this discovery, his team was honored with the “Medical Article of the Year Award” from Biomed Central. Other notable journals in which Dr. Riordan has published articles include the British Journal of Cancer, Cellular Immunology, Journal of Immunotherapy, and Translational Medicine.

In addition to his scientific journal publications, Dr. Riordan has authored two books about mesenchymal stem cell therapy: Stem Cell Therapy: A Rising Tide: How Stem Cells Are Disrupting Medicine and Transforming Lives and MSC (Mesenchymal Stem Cells): Clinical Evidence Leading Medicine’s Next Frontier. Dr. Riordan has also written two scientific book chapters on the use of non-controversial stem cells from placenta and umbilical cord.

Dr. Riordan is an established inventor. He is the inventor or co-inventor on more than 25 patent families, including 11 issued patents. His team collaborates with a number of universities and institutions, including National Institutes of Health, Indiana University, University of California, San Diego, University of Utah, University of Western Ontario, and University of Nebraska.

He has made a number of novel discoveries in the field of cancer research since the mid-1990s when he collaborated with his father, Dr. Hugh Riordan, on the effects of high-dose intravenous vitamin C on cancer cells and the tumor microenvironment. This pioneering study on vitamin C’s preferential toxicity to cancer cells notably led to a 1997 patent for the treatment of cancer with vitamin C. In 2010, Dr. Riordan was granted an additional patent for a new cellular vaccine for cancer patients.

Neil Riordan, PA, PhD earned his Bachelor of Science at Wichita State University and graduated summa cum laude. He received his Master’s degree at the University of Nebraska Medical Center. Dr. Riordan completed his education by earning a Ph.D. in Health Sciences at Medical University of the Americas.

Dr. Neil Riordan, PhD