
HCRC is directed by Isabel C. Arnold RN, BSN, CCRC a bilingual, certified, and highly experienced clinical research coordinator who entered the clinical research field in 1993. Isabel is from Chile, where she graduated from "La Universidad Catolica de Chile" in 1990 as a Registered Nurse. For the following six years she worked and gained experience in the areas of pediatrics, OBGyn, internal medicine, and cardiology. In 1993 she also began to participate in clinical research trials, mainly in the areas of women's health and internal medicine. In 1996 she was hired by Merck, Sharp & Dohme as a clinical research coordinator. during the nearly five years that she worked with Merck she attended numerous training courses sponsored by the company. She also opened and ran several study sites with trials in the areas of cardiology, neurology, bronco-pulmonary and women's health. In October of 2000 she moved to Denver, Colorado with her fiancé and soon to be husband, Bill Arnold. After learning English she continued her career in clinical research at the University of Colorado Cancer Center in phase I studies. There she had the opportunity to not only run clinical trials but also to re-organize and manage the phase I laboratory. While working at UCHSC she prepared and passed the examination to obtain her RN qualification in Colorado. After three and a half years working at UCHSC and prior to becoming the director of HCRC she moved to a private site as a clinical research coordinator where she ran studies in phases II to IV. She eventually became the site manager and under her management the site was recognized by more than 20 pharmaceutical companies, Clinical Research and Site Management Organizations in the United States and Europe for the superb quality and professionalism of its work. During this period she also obtained her certification as a Clinical Research Coordinator through the Association of Clinical Research Professionals. Outside of work Isabel and Bill enjoy international travel, landscaping and remodeling their home, hiking in the Rockies, and of course a fine glass of Chilean wine in the evening.
responsibilities are: the company finances; data management; website design, creation, and maintenance; volunteer recruitment; marketing, human resources, and management of the Center’s facilities and information technology. In addition to his duties at HCRC Bill was also a member of the Institutional Review Board (IRB) at National Jewish Health for two years. Bill graduated in 1995 from Southern New Hampshire University at the top of his class with a Bachelor of Arts degree in International Business. In 1996 he became the Assistant Director of an international language center in Santiago, Chile and was in charge of the Scheduling Department, Study Abroad Department, marketing of the Study Abroad Program, and management of over 80 teachers. In the fall of 2000 Bill accepted the position of Director of Admissions at the language center’s headquarters in Denver, Colorado and moved back to the United States with his fiancée, Isabel. During the following four and a half years Bill was responsible for the sales and admissions for the company’s schools in Denver, Colorado; Santiago, Chile; Buenos Aires, Argentina; Rio de Janeiro, Brazil and affiliated schools throughout Latin America and Spain. He also participated significantly in the international marketing of the language programs, website design, and creation of brochures and other marketing materials. In the fall of 2004 Bill started his own real estate investment company and within a few months began devoting his full attention to his new business. After three successful years in real estate investing Bill now devotes his time and energies to his duties at HCRC. Outside of work Bill and Isabel enjoy international travel, landscaping and remodeling their home, hiking in the Rockies, and of course a fine glass of Chilean wine in the evening. Tracy Chavez, PA-C, BHS, MMS Tracy began her career in healthcare in 2002 when she obtained her Associate of Science degree and her Medical Assisting certificate. Since that time she has worked hard and studied hard to continuously grow in her profession. In 2006, she earned her Physician Assistant Certificate and completed the course of study for a Master of Medical Science degree in conjunction with her Physician Assistant Program. In 2009 she fulfilled the final academic requirements for her Bachelor of Health Science degree and was awarded both her Bachelor of Health Science and Master of Medical Science Degrees. She has training as a Physician Assistant in the areas of family medicine, women’s health, orthopedics, pediatrics, surgery, emergency medicine, internal medicine, and trauma. At present she divides her time between working as a Physician Assistant at the offices of Denver Internal Medicine and as a clinical research sub-investigator at HCRC. She enjoys being able to apply her skills and knowledge in two distinct areas of healthcare. Tracy received her training and certification in the GCP/ICH guidelines early in 2008 prior to beginning her role as a sub-investigator at HCRC. To date she has been a sub-investigator on a wide range of clinical trials including: Acute Low Back Pain, Chronic Low Back Pain, High Cholesterol, Hypertension with Type 2 Diabetes, Hypertension in Minorities, Type 2 Diabetes, several Overactive Bladder studies, and numerous dermatological studies. Her work ethic, rapport with patients, attention to detail, love of challenge and her evident skills as a Physician Assistant makes her a wonderful and integral part of the HCRC team.
her free time Tracy enjoys running, home decorating projects, and listening to music.
a Bachelor of Science in Nursing degree in 1997 and then in 2008 she attained her Master of Science in Nursing with a Focus on Women’s Health Care degree. Over the decade between her Registered Nurse and Nurse Practitioner degrees she worked at Rose Medical Center, Littleton Hospital and Aurora Women’s Health. Although her duties and responsibilities as an RN were broad in nature, her interest and primary focus was in the area of women’s health. Liza now divides her time and responsibilities between her role as a Nurse Practitioner at Partners in Women’s Health, a multi-physician office specializing in obstetrics and gynecology, and her position as a clinical research sub-investigator for Horizons Clinical Research Center, LLC. In addition to her training and certification in the GCP/ICH guidelines, Liza has acquired a number of training certificates and professional credentials during her career. Liza has been a Sub-Investigator on a number of clinical studies including: Overactive Bladder, Diabetes/Hypertension, Plaque Psoriasis, Post-menopausal Symptoms, Endometriosis, and a Post-menopausal Low Sexual Desire study. Liza’s enthusiasm for her profession and the field of clinical research, her professionalism, her years of experience in health care, and her evident rapport and concern for her patients makes her an important and valuable part of HCRC’s research team. When not pursuing her career Liza loves being outdoors in her home state of Colorado (skiing, biking, camping, fishing, hiking), and spending time with her family and friends. Our goal at HCRC is to provide the highest quality study results possible to the sponsors and CROs that we work with while ensuring the protection of the rights and safety of the subjects who participate in our studies. The fact that we have an excellent reputation for the service we provide is due to the knowledge, skills, and integrity of our director, Isabel Arnold RN, BSN, CCRC. We know that the key to providing quality service depends to a large extent on the quality of the CRCs that conduct our studies. It is for that reason that we hire health care professionals without experience in research and train them how to be excellent CRCs. Isabel personally trains each and every new CRC we employ and then continues to mentor them with the goal that we have the best trained research professionals possible. This method of acquiring high quality professional CRCs is time consuming and requires a great deal of effort on the part of Isabel, but our goal to have a highly trained staff of CRCs who truly care about the quality of their work is worth it. Erika Enriquez-Wickwar, LPN, CRC Erika has wide-ranging work experience and has held positions as diverse as: legal assistant, escrow coordinator, and model for a promotional events company. The one thing that all of her jobs have had in common though is that they all entailed working with people. Erika has always known that working with, and helping people, was what she wanted to do. It is probably for that reason that she has always been interested in the health care field and the reason she finally decided to pursue her nursing degree. Her nursing studies began in Texas and continued after moving to Denver. In the interim she decided that she would like to take her nursing career a step at a time so in 2008 she obtained her LPN certificate. Her work experience in health care has been obtained through her internships and includes the areas of medical- surgery, pediatrics, orthopedics, OB/GYN, gerontology, and psychiatrics. Now as a Clinical Research Coordinator at HCRC her experience will grow considerably in the areas of dermatology, gynecology and internal medicine. Erika also continues to study part-time to obtain her goal of becoming a Registered Nurse. HCRC is fortunate to count Erika as part of our research staff. Her pleasant personality, easy way with people, and genuine concern for her patients enable her to quickly develop and maintain patient rapport. Her natural attention to detail and innate sense of organization are also important aids in her work as a CRC. Erika is also bilingual in English and Spanish which enables her to work easily with both of our patient populations. When not at work Erika likes to travel, enjoy nature, and jog outside if it is warm and sunny. She also likes to cook with her husband and spend time with family and friends.
Lucia has always been interested in working in the field of medicine and in fact earned her medical doctorate in Mexico. She worked as a general physician from 2002 to 2003 at a rural clinic in Chihuahua until moving to the United States with her husband. In the intervening years she has learned English, grown her family by three, and in order to work in the medical field went back to school first earning her Medical Assistant certificate, then her license as a Practical Nurse, and then finally her license as a Registered Nurse. She continues to study with her sights set on becoming a Nurse Practitioner. We are fortunate and pleased to have Lucia working with us. She exhibits all the qualities of an excellent Clinical Research Coordinator with dedication to her patients, insistence on clean and accurate data, strong organizational skills, attention to detail, ability to multi-task, willingness to take on new challenges and of course her natural concern as a health care professional for her patients. She relates well with her study subjects easily making them feel comfortable and confident that they will receive the quality of care and attention at Horizons that they deserve. Her bilingual skills enable her to work equally as well with both our English or Spanish speaking volunteers. In her free time Lucia likes to spend quality time with her kids and family members, listen to music, and watch a good movie.
Azucena (Susy) received her Medical Assistant Certification in 2007 through the Lorenzo Walker Institute of Technology in Naples, Florida where she also became a member of the Honor Roll of American Association of Medical Assistants. Rather than remaining in Florida to ply her new profession she decided to return home to Denver with her two children. HCRC was fortunate to hire her as a Research Assistant / Medical Assistant and she has proven to be an invaluable asset to our research team. Susy has received her training and certification in the GCP/ICH guidelines and is also certified to ship infectious and biological substances. Among her many other duties she is in charge of the laboratory and is responsible for processing and shipping all study samples.
rapport with patients is very evident, and as she is also bilingual in English and Spanish, she works well with all of our patients. When she is not working, Susy likes to spend time with her children, play bally-ball, and of course, go shopping. |





Director
Business Manager
Sub-Investigators
Clinical Research Coordinators
Clinical Research Assistant




