Our Team

Executive Leadership

Dr. Erika Gonzalez

Chief Executive Officer & President

Dr. Erika Gonzalez is the CEO & President of STAAMP Allergy. She previously served as the Chief of the Allergy, Immunology & Rheumatology division at the Children’s Hospital of San Antonio and was an Associate Professor of Clinical Pediatrics at Baylor College of Medicine.


She is actively involved as a community leader including serving on the Board of Directors and as the 2020 and 2021 Immediate Past Chairwoman for the San Antonio Hispanic Chamber of Commerce and the Board of Directors for Central Catholic Highschool. She is an Advisor to the Dean of Science Engineering & Technology at St. Mary’s University and at the state and national level, she is on the Stock Epinephrine Committee with the Texas Department of State Health Services, and is Co-Chair for the Small Business for America’s Future.


Dr. Gonzalez founded the nonprofit, Con Corazon SA, addressing health inequities and emergency preparedness in San Antonio and the surrounding area. Dr. Gonzalez is a native of San Antonio, graduated Magna Cum Laude from St. Mary’s University, obtained her medical degree from the University of Texas Medical Branch at Galveston, and returned home after completing 10 years of Active Duty Service as a Medical Officer in the U. S. Air Force.


She was selected as a 2019 Presidential Leadership Scholar and was appointed to serve on the National Medal of Science Committee by President Joe Biden. Most recently, STAAMP was awarded San Antonio Business Journal’s 2022 Diversity and Inclusion Award for their work to promote diversity, equity and inclusion in the workplace.

Dr. Joel Reyes

Chief Executive Officer | STAAMP Research

Managing Partner | STAAMP Allergy

Dr. Reyes is the CEO of STAAMP Research and is a board-certified pediatric intensivist serving the critically ill children of west Texas and southern New Mexico. Originally from the Philippines, he immigrated with his family and grew up in Stockton, California. He received a bachelor’s degree in music from New York University before earning his medical degree from the Kirksville College of Osteopathic Medicine. He completed his pediatric residency through the US Air Force and pediatric critical care fellowship at the University of Texas Health Science Center in San Antonio. Dr. Reyes served 12 years in the US Air Force, where he had the opportunity to transport critically ill children across the Pacific, helped found and teach a fundamentals of pediatric critical care course both stateside and in Japan, as well as deployed to Bagram, Afghanistan, treating US and NATO forces as well as local children caught in the crossfire of war. He separated from the military as a Lieutenant Colonel.


He continues to be active in physician advocacy and medical education through the Society of Critical Care Medicine and the Bexar County Medical Society. He has written and edited textbook chapters on pediatric trauma and pediatric airway management. He served as a Health Care Consultant for Texas Electric Transportation Resources Alliance (TxETRA) and was a frequent speaker to legislators and stakeholders on the health detriments of standard vehicle emissions and potential benefits of transitioning to electric vehicles. Dr. Reyes is also an avid supporter of the arts having served on the board of ARTS San Antonio and is currently also a saxophone instructor at the San Antonio Academy. 

Dr. John Dice

Chief Medical Officer

Dr. Dice is the Chief Medical Officer and attending physician at STAAMP and investigator for STAAMP Research.


Originally from upstate New York, Dr. Dice graduated magna cum laude from the University of Notre Dame. He then went on to attend medical school at the University of Virginia. He completed his residency in Internal Medicine and fellowship in Allergy & Immunology in the US Air Force and went on to serve 13 years active duty before separating as a Lieutenant Colonel.


Before his time at STAAMP, Dr. Dice served as Chief of Allergy & Immunology at Keesler AFB and Scott AFB, was the Director of Immunizations for Wilford Hall Medical Center, and is an author of two book chapters and lecturer on the topic of urticaria.

Isabel Alejandro

Staff & Facilities Manager

Mrs. Alejandro is the Staff & Facilities Manager at STAAMP Allergy. Isabel is known for assisting with administrative support to all clinic departments and providing customer service satisfaction. She was one of the Founding Employees of STAAMP Allergy and brings over 20 years of Medical Billing and Administrative Management experience; manages and oversees our Administrative, Billing and Referral Departments. 


In her free time, she cherishes spending quality time with her husband, daughter, son, and fur babies. She also enjoys exploring the natural beauty of Texas State Parks and the enchanting Emerald Coast campsites.

Sandra Brown

Finance Director

Ms. Brown is the Director of Finance at STAAMP Allergy. Sandra is responsible for overseeing the billing staff, Benefits coordinator, Referral Coordinator and Credentialing.

 She brings in  over 30 years of financial experience and Office administration.


When Sandra is not working at STAAMP, she enjoys traveling and spending time with family and friends.


Cari Alvarado

Strategic Analyst & Marketing Director

Ms. Alvarado is the Strategic Analyst and Marketing Director at STAAMP Allergy and has been with the organization for five years. She earned her Bachelor’s degree in Business Marketing and her Master’s degree in Business Management from Troy University. In her role, Cari supports organizational growth by delivering data-driven insights, aligning departmental initiatives with strategic priorities, and overseeing marketing strategy to ensure cohesive and effective execution across the organization.


When she is not working at STAAMP, Cari enjoys painting, creating at-home DIY projects, and spending time with her two fur-babies, Daisy and Tobi.

Gilbert Loredo

Executive Administrator

Mr. Loredo is the Executive Administrator to the CEO at STAAMP Allergy. He earned his Bachelor’s degree in Public Relations from the University of Texas at San Antonio. In his role, Gilbert works closely with the CEO and leadership team to support daily operations, coordinate administrative initiatives, and help ensure organizational priorities are executed efficiently. He is known for his professionalism, attention to detail, and commitment to supporting a collaborative and well-organized work environment.



When he is not supporting day-to-day operations at STAAMP, Gilbert enjoys spending time with family and friends, exploring new restaurants, and staying active in the community.


Our Team

Medical Providers

Dr. Jeffrey Hallett

Board-Certified | Adult & Pediatric Allergy and Asthma

Jeffrey S. Hallett, M.D. specializes in the comprehensive care of adults and children suffering from allergies, asthma, sinusitis, bronchitis and other respiratory problems. He takes pride in offering his patients personalized attention and state-of-the-art medical care.


Dr. Hallett has been in private practice since 1987 and is a Fellow of the American College of Allergy, Asthma and Immunology and the American Academy of Allergy, Asthma and immunology.


A native of West Virginia, Dr. Hallett graduated Magna Cum Laude and Phi Beta Kappa from West Virginia University. He received his medical degree from the West Virginia University School of Medicine. Dr. Hallett completed his Pediatric Residency and his Allergy, Asthma and Immunology Fellowship at Wilford Hall USAF Medical Center in San Antonio. He also served as the Chief of the Allergy and Immunology service at the USAF Regional Medical Center at Scott AFB, Illinois.


Married with one daughter, Dr. Hallett also lectures nationally and internationally on topics including Allergy and Immunology, Asthma, Sublingual Immunotherapy (Oral Allergy Drops) and Allergy and Asthma Practice Standards.

Grace Hughes

Family Nurse Practitioner

Mrs. Hughes is a Nurse Practitioner at STAAMP Allergy. She attended North Park University in Chicago, IL and graduated with a Bachelor's of Science with a major in Nursing in 2010. She then attended the University of Texas Health Science Center at San Antonio and graduated with a Master's of Science in Nursing in 2015. NP Hughes works in collaboration with the physicians of STAAMP to provide compassionate, high-quality, evidence-based care to our patient's and their families. 


When she is not working with patients, she is likely spending time traveling or doing something fun outdoors with her husband and two daughters.

Marie Celeste Loera

Family Nurse Practitioner

Ms. Loera, FNP-BC is a board-certified Family Nurse Practitioner at STAAMP Allergy. She was born and raised in San Antonio and earned both her Bachelor of Science in Nursing and Master of Science in Nursing from the University of Texas Health Science Center at San Antonio, where she was inducted into the Sigma Theta Tau International Nursing Honor Society. Celeste specializes in Allergy, Asthma, and Immunology and brings more than a decade of experience in both clinical allergy practice and pharmaceutical clinical research. She works closely with the physicians at STAAMP to provide patient-centered, high-quality, evidence-based care tailored to individuals with complex allergic and immunologic conditions.


When she is not caring for patients, Celeste enjoys exploring new restaurants, cooking, spending time outdoors, and participating in local community events. She is also a proud dog mom to her Cockapoo, Sawyer.


Alyssa Parsons

Physician Associate

Mrs. Parsons, PA-C is a Physician Associate at STAAMP Allergy. She earned her Master of Medical Science in Physician Assistant Studies from Midwestern University in Glendale, Arizona. In her role, Alyssa provides comprehensive patient care, including new patient consultations and ongoing management, and oversees the administration of allergy immunotherapy in the clinic. She works closely with the physicians and clinical team to deliver high-quality, patient-centered, and evidence-based care.


When she is not caring for patients at STAAMP, Alyssa enjoys weightlifting, cooking, and spending time with her husband and daughter.

Our Team

Research Staff

Dr. Lucia Salas (IMG)

Clinical Education and Research Coordinator

Dr. Salas is the Clinical Educator and Research Coordinator at STAAMP Allergy. She attended the University of Monterrey (UDEM) in Monterrey, Nuevo Leon, Mexico; and graduated with Summa Cum Laude. Dr. Salas contributes with clinic consultation under supervision and guidance of Dr. Gonzalez. She participates in lectures and clinical cases providing skillful patient education. Dr. Salas is also responsible for recruiting patients for research trials.


When Lucia is not at STAAMP Allergy, she is on the phone or in a restaurant talking with friends and family.

Dr. Daniela Ramirez (IMG)

Immunotherapy Coordinator

Dr. Daniela Ramirez is the IT Coordinator at STAAMP Allergy. She attended Universidad de Monterrey in Monterrey, Nuevo Leon, Mexico and graduated with her Doctor in Medicine Degree. Daniela is responsible for the preparation, distribution and oversight of the Immunotherapy clinic.


When Daniela is not an IT Coordinator at STAAMP Allergy, she is at relaxing cafes or participating in outdoor activities with friends and family.