meet our team

Chiropractor Ellicott City MD Brian Morrison


Brian Morrison DC

Location: Ellicott City

Dr. Brian Morrison completed his undergraduate studies in biology at the State University of New York at Binghamton. He became interested in integrative medicine after suffering from recurrent, severe low back pain due to a sports injury. He did not find relief with traditional methods and sought the services of a chiropractor. Based on his successful experience he decided to pursue chiropractic as a career. In 1987, he graduated magna cum laude, valedictorian from Logan College of Chiropractic in Chesterfield, MO.

He went on to complete a residency in Chiropractic Family Practice at Lindell Hospital in affiliation with Barnes and Jewish Hospitals in St. Louis, MO. Dr. Morrison has been in private practice in Ellicott City, MD for 27 years. He has been named "Chiropractor of the Year" by the Maryland Chiropractic Association.

In 2005, he began an affiliation with the University of Maryland Center for Integrative Medicine and was formally brought on as Clinical Faculty with the School of Medicine in 2014. He teaches courses on manual medicine and pain science for 4th year medical students and residents.

Dr. Morrison's private practice is a clinical teaching facility for the University of Maryland School of Medicine. You may have the opportunity to meet the medical students and residents as they shadow the Morrison Chiropractic doctors throughout the year.

Dr. Morrison's philosophy is that correction of biomechanical dysfunctions of the musculoskeletal system and educating the patient about pain physiology are key elements in reducing or eliminating pain, restoring comfortable, healthy, efficient movement and in preventing future problems.

He recently co-authored a chapter on Integrative Management of Pain in Practical Management of Pain, 5th Ed. H. Benzon Ed. Dr. Morrison is a featured presenter for the University of Maryland Center for Integrative Health and Healing Annual Wellness Conference, Maryland Chiropractic Association, Maryland Massage Therapy Association, DC Dental Society and the Howard County Dental Hygiene Association. He is a member of the Columbia Association Medical Advisory Board.

Chiropractor Clarksville MD Haydee Morrison


Haydee Morrison DC

Location: Clarksville

Haydee Morrison DC is a graduate of Logan College of Chiropractic in Chesterfield, MO, and she received her Bachelor of Science degree from the State University of New York at Binghamtom. She is Board Certified and licensed in the state of Maryland with Physical therapy privileges. Dr. Morrison has been helping Howard County families recover from pain and injuries for over 25 years.

She was born in Havana, Cuba and speaks Spanish fluently. Her approach to health care is to discover and address the cause of your health condition, not merely mask it with medication. As a Doctor of Chiropractic, she is an expert at detecting and correcting spinal misalignments. Her focus is on improving or eliminating the underlying condition with chiropractic treatment. She teaches her patients how to care for themselves through appropriate life-styles modification and corrective exercise, allowing the body to heal as completely as possible.

Chiropractor Clarksville MD Sean Nealon


Sean Nealon DC

Location: Ellicott City

Dr. Sean Nealon earned his Doctor of Chiropractic degree from Logan University, where he graduated with honors. He is originally from the Cincinnati, OH area.

He holds certifications in kinesiology taping and Functional Movement Systems and has taken courses through the Motion Palpation Institute and McKenzie Institute for Mechanical Diagnosis and Therapy, where he has learned additional methods of assessment, adjustments, and treatment through corrective exercise.

Dr. Nealon believes that movement is medicine and sees his role as helping his patients remove obstacles to healthy movement. His personal interests include strength training and conditioning, hiking, indoor rock climbing, reading, swing dance, and playing floor hockey with his cat.

Chiropractor Clarksville MD Patrick Harvey


Patrick Harvey DC

Location: Clarksville

Dr. Patrick Harvey is a native of Washington, D.C. and is a graduate of Palmer Chiropractic College in San Jose, CA. Licensed in 2017 as a Supervising Chiropractor with Physical Therapy privileges, and later in 2021 with Dry Needling privileges he has enjoyed practicing in Silver Spring, Laurel, Columbia, and now in Clarksville as part of the Morrison Chiropractic team.

He received his B.S. degree in Kinesiology from the University of Maryland at College Park in 2010 and his A.A. in Exercise Science from Montgomery College in Rockville, MD also in 2010.

Having spent 8 years as a personal trainer prior to his chiropractic training, Dr. Harvey realized that he could help patients achieve pain free states and better function without drugs but with simple movement training. Combined with the effects of chiropractic manipulation he has the tools to help you get out of pain and increase your ability to enjoy life He is currently enrolled in the Certified Chiropractic Sports Practitioner program and intends on completing the American Chiropractic Rehab Board Diplomate to increase his skill set.

In his spare time, he enjoys spending quality time with his wife Jenny and his son Evan. He is an avid weightlifting and kettlebell enthusiast and loves spending time outdoors hiking and bike riding.

Chiropractor Ellicott City MD Sebastian Petellis

Sebastian Petellis DC

Location: Ellicott City

Dr. Sebastian grew up in Frederick, MD not far down the road from our office in Ellicott City. He attended Towson University where he received his bachelor's degree in Exercise Science. During his undergraduate studies, he interned at a chiropractic and physical therapy facility that served the greater Baltimore area, including players from the Baltimore Orioles. It was during this time that he realized the power of conservative care and the freedom of treatment that a chiropractic scope of practice provides the doctor.

After graduating from Towson University, Dr. Sebastian moved to St. Louis, MO to pursue his Doctor of Chiropractic and Masters in Sport Science and Rehabilitation from Logan University. In December of 2022 he graduated with his doctorate with Cum Laude honors and graduated with his masters with distinction. At Logan, he expanded his studies outside of the classroom by being involved with nationally recognized student organizations such as Motion Palpation Institute (MPI), Forward Thinking Chiropractic Alliance (FTCA), and Rehab 2 Performance (R2P). With R2P, Dr. Sebastian served as vice president for the Logan University chapter. In this role, he not only furthered his own knowledge in cutting-edge rehabilitation principles, but he also developed curriculum and led weekly lectures on these topics to share this knowledge with his fellow students at Logan.

Dr. Sebastian seeks to be an evidence-based physician that practices within the guidelines of current research and best practices. While attending Chiropractic school, he attended countless hours of continuing education courses including Motion Palpation Adjusting, Dynamic Neuromuscular Stabilization (DNS), McKenzie Method of Mechanical Diagnosis and Therapy (MDT), Dry Needling, Selective Functional Movement Assessment (SFMA), and more.

Outside of the office, Dr. Sebastian enjoys spending time with friends and family and listening to music. You can find him lifting weights, enjoying nature, playing his guitar, or tending to his collection of houseplants.

Chiropractic Ellicott City MD Sade Bademosi Meet The Team
Chiropractic Assistant

Sade Bademosi

Location: Ellicott City

Sade started with Morrison Chiropractic in May 2017. She is studying to be an occupational therapist. Sade loves to travel, shop and spend time with her niece and nephew. Sade is from Nigeria and loves to visit family when she is able. She is also an event planner and enjoys working with people to create amazing memories for their special days.

Office Manager / Forensic Medical Biller

Danielle Cullison

Location: Ellicott City

Danielle came to us in 2015 with 20 years of office management experience in the veterinary and childcare licensing fields. She is our HIPAA privacy officer and has a special interest in this area. She is a big supporter of working to combat the opioid epidemic through chiropractic pain management and physical therapy. In her free time, she enjoys gardening, hiking with her Golden Retriever, Raimi, attending local concerts, and spending time with her nephew and nieces.

Authorization Coordinator / Forensic Medical Biller

Joann Deal

Location: Ellicott City

Joann joined Morrison Chiropractic in 2017 as a patient service specialist and is currently the authorization coordinator. She enjoys her job and strives to provide an excellent experience for all patients to ensure their comfortability when receiving care.

Patient Service Specialist/Medical Biller

Jillian Buckingham

Location: Ellicott City

Jillian joined Morrison Chiropractic in March of 2021. She is studying to be a Physical Therapy Assistant. When she is not working or studying she enjoys spending time outside with her dog, Goober. She is very excited to meet all of you!
Patient Service Specialist

Megan McDaniel

Location: ClarksvilleEllicott City

Megan joined Morrison Chiropractic in September of 2022. She is currently studying to become a dental hygienist. When she is not working or studying, you can find her with her dog or 4 cats. She looks forward to meeting everyone!
Chiropractic Assistant

Onorere Okojie

Location: Clarksville

I have a B.S in Kinesiology, and my plan is to attend medical school within the next couple of years. In my free time, I enjoy spending time with family & friends, working out, volunteering, and traveling. I am very excited to be a part of the team, and I look forward to meeting everyone!

Chiropractic Assistant

Katie Klos

Location: Clarksville & Ellicott City

Katie joined us in October, 2022 providing exercise therapy as a Chiropractic Assistant, and supporting patients in healthy lifestyle adjustments as a Health and Wellness Consultant.

She has been practicing as a NASM-Certified Personal Trainer since 2020 and offers ongoing training services so our patients can maintain a healthy way of life long after our chiropractic team has completed treatment. In 2022, she completed a post-graduate certification from the University of Maryland Baltimore having studied Integrative Health and Wellness under a longtime colleague of Dr. Morrison.

Katie takes a holistic approach to personal training and health management, understanding that wellness goes beyond diet and exercise alone. Functional health is also influenced by one's lifestyle habits, environments, social circles, and more. Unlike conventional healthcare, which prioritizes symptom management over identifying and treating the root cause of the symptoms, Katie takes the time to understand your habits, conditions, and values to develop a customized wellness regimen that best fits your lifestyle and goals.

She looks forward to meeting you and offering any opportunity to help you maintain your health and find your love for fitness.

Patient Service Specialist

Maggie Nolting

Location: Ellicott City

Maggie joined the Morrison Chiropractic Team in October 2021 .She graduated from Smith College in 2019 with a B.A. in Classical Languages and Literature. When Maggie is not in the office, she works on finishing up her pre-requisites for physician assistant school and playing with her cats! Maggie can't wait to meet everyone!

Patient Service Specialist & Chiropractic Assistant

Lisa Greene

Location: Clarksville

Lisa originally began working at Morrison Chiropractic in 1995 and was an integral part of the team. She obtained her CA license in 1998 and returned to school to obtain a degree in Chemical Dependency Counseling. Lisa took on a new career in December 2011 as an Addiction Counselor and sadly, left the practice. 

She counseled for 5 years from December 2011 to December 2016 and then took a new position at UMBWMC working in the Psychiatric ED for close to 5 years. Lisa returned to Morrison Chiropractic October 2021 and expressed genuine happiness for feeling as if she had returned home.

Lisa and her husband, Preston will be married 24 years this September. They were married at The Morrison's property on a beautiful September day overlooking the pond in 1998. Together, they have 2 sons and a daughter; 2 of which are married. Her greatest love is her 11-year-old granddaughter.

The entire family shares a deep affinity for soccer; they even played a couple indoor adult sessions as a family unit. Lisa loves cat's and every fur baby they have brought into their home has been a rescue. She also has regular strays that stop by for daily meals.

Lisa will always greet you with a smile and kind words, so stop by the office or give her a call.

Team mascot

J Roddy

Hello! My name is J Roddy and I am a Reeves turtle from China. How did I get my unique name you ask? I was named after a local musician named J Roddy Walston.

I am approximately forty years old and can live to sixty plus years! I was rescued from the wild animal meat market thirty years ago. Thank goodness!

I lived with Carl H. Ernst, PhD for many years. He is an author and was a Professor at George Mason University. A brilliant man with a love for turtles.

When he retired Dr. Morrison adopted me and I knew I was in good hands. Not to brag but I'm kind of a big deal around here. I love to interact with people.

Please do not tap on the glass as it bothers me. I will come to you. I enjoy treats, attention, chasing the fish, and casually soaking up the warm rays on my log.

There are lots of turtles in Maryland but remember not all of them live in water like me. If you see a turtle in the road please gently move him to the side he was headed. Do not take him home. We have a very specific home range and will spend the rest of our lives trying to get back.

For more information on turtles and how great we are visit

Also check out these books - Turtles of the World and Turtles of the United States and Canada by Carl Ernst.