Meet Our Admin

Dr. Meghan T. Lee earned her bachelor’s degree from Colorado State University and both her master’s and Ph.D. from Auburn University. She furthered her education in Neuropsychology through UC Berkeley Extension and Brigham Young University.

Dr. Ramya Rangamannar earned her bachelor’s degree from Barnard College at Columbia University and her master's and doctorate degrees in Clinical Psychology from the University of Hartford. She completed her pre-doctoral clinical internship at the University of Florida and post-doctoral fellowship in pediatric neuropsychology at the Children’s Hospital Colorado.

Over the last decade, Dr. Ramya has gained clinical expertise in a multitude of settings (i.e., medical, psychiatric, private practice) with children from early toddlerhood through early adulthood. Despite specialization in pediatrics, Dr. Ramya has also worked with younger and older adult populations in her training. She prides herself on understanding the "whole child" in the context of their home/family, school, and social realms and in providing families with tangible resources and recommendations in supporting their child’s development and success.

Dr. Dorothy Nguyen-Daniels earned her doctoral degree with a concentration in neuropsychology from the Illinois School of Professional Psychology. She completed her pre-doctoral internship at Truman Memorial Veterans’ Hospital in Missouri and her two-year postdoctoral fellowship in neuropsychology at the University of Kansas School of Medicine-Wichita. In addition, she obtained a master’s degree in gerontological counseling from Adler University in Illinois.

Dr. Nguyen-Daniels provides comprehensive outpatient evaluations of adults and older adults presenting with various neurological conditions, including dementia, mild cognitive impairment, concussion/traumatic brain injury, neurodegenerative disease, stroke, cerebrovascular disease, epilepsy, movement disorders, autoimmune disorders, and complex medical/psychiatric conditions. She also has experience conducting pre-surgical evaluations (e.g., epilepsy, DBS) and inpatient consultations. In her clinical work, Dr. Nguyen-Daniels strives to use a thorough, compassionate, and culturally-sensitive approach that enables patients to understand better their strengths, areas of growth, and helpful resources to function and feel their best.

Dr. Molly Sullan earned her doctorate degree in clinical psychology, with a specialization in neuropsychology, from the University of Florida. She completed her pre-doctoral internship and her two-year neuropsychology fellowship at the VA San Diego Healthcare System/University of California, San Diego.

Dr. Sullan’s research has focused on understanding the relationship between post-traumatic sleep difficulties and cognitive, psychological, and physiological recovery for patients with a history of acquired brain injury (e.g., traumatic brain injury and stroke). Clinically, she has experience in the assessment of a broad spectrum of neurological disorders both in inpatient and outpatient settings, including brain tumors, epilepsy and movement disorders (e.g., Parkinson’s disease), memory disorders and dementia, stroke and cerebrovascular disease, traumatic brain injury, demyelinating lesions, autoimmune disorders, complex psychiatric concerns, substance use disorders, and neurodevelopmental considerations.

Dr. Sullan is an affiliate faculty member at Horizon, which means that she does not currently see patients clinically. She works in research and remains involved with the HNS didactic series related to the HNS training program.

Dr. Alexis Sliva earned her bachelor’s degree in psychology from University of Wisconsin - River Falls and her master’s and doctorate degrees in school psychology from the University of Denver. She completed her pre-doctoral internship and post-doctoral fellowship in clinical psychology at a private practice in Las Vegas, Nevada, with an emphasis on forensic psychology.

Dr. Sliva’s early training focused on supporting students and families from the school environment. Her clinical training has focused on intervention, evaluation, and assessment across community resource center and private practice settings. While she specialized in childhood to early adulthood, she also worked with adult populations. She has experience in the assessment of mood disorders, anxiety, PTSD, psychosis, ADHD, and learning disabilities. In addition, her forensic experience consisted of completing Court ordered evaluations (e.g., child custody, risk, and certification). She is passionate about working with families to establish diagnostic clarity and subsequent resources. She is excited to broaden her clinical experience by completing a lifespan residency in clinical neuropsychology at HNS.

Dr. Melissa Estrada earned her bachelor’s degree in psychology with a minor in Spanish from Arizona State University. She obtained her Master’s degree and doctoral degree from the University of Northern Colorado. She completed her pre-doctoral internship at a K-8 school in Arizona. 

While Dr. Estrada’s early training focused on advocating for students and families in the school setting, her training included providing therapy and neuropsychology assessment services in a pediatric hospital setting. She has experience in the assessment of ADHD, learning and intellectual disabilities, emotional disabilities, and developmental delays. Clinically, she has experience in the assessment of brain tumors, congenital heart disease, leukemia and other blood cancers. 

Because of her background in the school setting, Dr. Estrada is able to provide resources and recommendations that are feasible for the school setting. Additionally, Dr. Estrada is fluent in Spanish and has pursued various opportunities that have allowed her to grow as a bilingual neuropsychologist. She is excited to pursue a lifespan neuropsychology residency at Horizon Neuropsychology Services!

Nicole Liedike earned her bachelor’s degree in psychology from Wilmington University and her master’s and doctorate degrees in clinical psychology from The Chicago School of Professional Psychology. She completed her pre-doctoral internship in clinical psychology at a private practice in Colorado Springs, CO that primarily focused on neurodevelopmental, psychological, and neuropsychological assessments with populations ranging from 18 months of age in older adulthood.

Nicole’s training experience prior to her graduate career was in acute psychiatric hospitalization care working with adolescents, adults, older adults, and dual diagnosis populations. During her graduate career, she has worked with preschool-aged children in a school setting, and with adults and older adults in private psychological practice and outpatient medical settings providing therapeutic support and conducting psychological and neuropsychological evaluations. Her future career goal is to become a board-certified neuropsychologist focusing on assessment for traumatic brain injury and neurodegeneration populations. With her passion for neuropsychological assessment, Nicole is enthusiastic about completing her lifespan residency in clinical neuropsychology at Horizon Neuropsychological Services.

Madison recently earned her bachelor's degree from Colorado State University in behavioral and cognitive neuroscience and has previous experience shadowing the pediatric neurosurgeons and PAs at Wolfson Children's Hospital in Jacksonville, Florida.

Madison is a very friendly individual who has worked with kids over the course of her teen years and is excited to interact with youth of all ages as they visit the Horizon office. She hopes she can be another friendly face that welcomes patients into the office and, in one way or another, bring comfort to families as they come in and get the help they deserve.

Frankie graduated from Golden High School in May 2023 with an excellency nomination in speech and debate, as well as a distinguished scholar merit from the NSDA. He volunteered for the Helping Hands Club during the school year and completed a formal neuropsychology internship at Horizon Neuropsychological Services during his senior year.

Frankie was accepted into Colorado University at Boulder where he will be majoring in psychology with the intention of eventually pursuing his master’s and doctoral degree in clinical neuropsychology. Currently, Frankie is a neuropsychological technician at Horizon Neuropsychological Services, where he will continue working throughout college.

Carly Moellenkamp earned her  Bachelor’s degrees in Psychology and Spanish from Montana State University in her hometown of Bozeman, Montana. Almost immediately, she became interested in using her expertise in psychology in a clinical setting.

After gaining experience with children and adults in a neuropsychology clinic, she took on the challenge of moving to a new state to continue her passion for helping people understand their brain function.

Payson earned her Bachelor’s degree from Santa Clara University, studying Psychology, Public Health, and Biology. Payson worked as a psychology research assistant for two research labs throughout college. She also has clinical experience as a Behavioral Health Technician working with adults at a residential treatment program in the Bay Area. Payson hopes to one day pursue a PsyD to become a practicing clinical neuropsychologist.

Penny earned her Bachelor’s in Social Work with a Concentration in Human Services from the State University of New York at New Paltz. In addition, she holds a Bachelor of Science in Nutrition and an Associate’s Degree in Liberal Arts.

Penny has worked with children and families in various settings as a case aide, family group conference facilitator, and office manager. Penny's professional expertise as an administrative support and direct care provider, positive energy, and warm smile are invaluable to the Horizon Neuro team and the families we serve.

Markayla is currently attending University of Colorado, Denver where she is studying for her degree in Recording Arts Technologies. She is on-track to graduate within the next two years.

Markayla's volunteer experience includes being an organizer for Operation Christmas Child—an initiative that sends Christmas presents to children in underprivileged countries. She was responsible for preparing the gift boxes with necessary items, such as toothbrushes, toothpaste, band-aids, clothes, and even toys. Markayla truly has a heart for helping others. In addition, she is hard working and extremely organized—skills that she brings to the Horizon Neuro staff as a file clerk.

Savannah earned her bachelor's degree from Colorado State University in health and exercise science with a concentration in sports medicine. She has clinical experience as a Behavioral Technician working with kids on the spectrum.

During her time as a clinician, Savannah has discovered her more profound passion for medicine and is pursuing a future as a Physician Assistant (PA). She hopes to work in the emergency room, where her passion for helping others will impact various patients.

Matt Mullens is a seasoned software development and system architecture professional boasting extensive experience across diverse industries and technologies. At the forefront of technical initiatives at Horizon Neuro, Matt is instrumental in elevating operational efficiency.

Committed to advancing Horizon Neuro's mission, he has furthered his expertise through specialized training in Psychometry at Horizon Neuro, focusing on academic testing. Matt's electrical and computer engineering studies at the University of Colorado, Boulder, also bring a solid foundation to his new psychometrist role.

Matt is enthusiastic about leveraging his experience and skills and is ready to deliver optimal care to patients and their families.

Élishia Sharie has over 12 years of experience in web design, graphic design, and photography. With a bachelor’s degree in Sociology and Marketing, Élishia Sharie has enjoyed consulting and creating marketing collateral for a varied clientele—ranging from the entertainment/media, education, health, beauty, nonprofit, and transportation fields.

Élishia Sharie's ability to provide and incorporate her branding and marketing knowledge in all of her creative works is what makes her a resource for brands and companies that value a professional, consistent, and clear message and look across all media and platforms.

Élishia Sharie is the designer and manager of the Horizon Neuropsychological Services website. To report any website issues, please contact her here.