
OUR TEAM
MEET OUR
TEAM OF PRACTITIONERS.
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LISA LEWIS Ed.D. CADC-II Licensed Psychologist & Co-Founder
Dr. Lewis is a licensed psychologist and certified addictions counselor. She holds a Master’s degree in clinical counseling psychology, and a doctoral degree in counseling and sport psychology. Lisa is a lifelong student of the deep connections between physical and mental health, and the innate desire she believes all people have to learn, strive, grow, and evolve.
Lisa has been practicing psychotherapy since 2003, and worked in inpatient psychiatry and substance abuse hospitals, partial hospital and intensive outpatient programs, community mental health, and college mental health before opening her private practice in 2014. Her therapeutic approach is solution-focused, active, and collaborative. To learn more and connect, visit her website at:
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Cristine Seitz MS RD LDN
Cristine is a Registered Dietitian, practicing approachable and individualized nutrition counseling. A firm believer that you are the expert in your own body, Cristine focuses on mindful eating practices that honor hunger, fullness, and overall well-being. Rejecting rigid food rules, she empowers clients to discover sustainable eating habits that feel best for their unique bodies and lifestyles.
With 12 years of nutrition counseling experience, Cristine has worked with many individuals to improve their health, eating habits, and their relationship with food. Her specialty areas include general health and wellness, weight management, diabetes and PCOS. To learn more and connect, please visit her website at: -
Mariam Taha, DPT, CSCS, Taha Training and Physical Therapy, LLC
Dr. Mariam Taha, PT, DPT, CSCS is a doctor of physical therapy specializing in pelvic health. Mariam received a bachelor’s degree in exercise physiology and doctorate of physical therapy from the University of Massachusetts Lowell. She has done extensive continuing education coursework in pelvic health. She is also a strength and conditioning specialist and personal trainer. Mariam always tries to make physical therapy and training the most enjoyable experience she can and enjoys working with a variety of patients. She believes in helping everyone achieve a healthier lifestyle. When Mariam is not working, she enjoys taking group fitness classes, trying new coffee shops and baking. For more information, please see her website at
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CASEY EGAN, DPT Ripple Physical Therapy, LLC
Casey has a passion for helping people continue doing what they love. She has an affinity for treating golfers and runners but loves helping anyone stay active in their favorite ways. She believes movement is medicine and hopes to get you pain-free through functional strengthening, motor control and manual mobilization techniques. Doctor Egan is also trained in dry needling! Outside of work you can find her cheering for all the Boston sports teams or hanging by the lake with family.
To learn more about Casey and connect, go to her website at:
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Dan Negron, DPT, Ripple Physical Therapy, LLC
With a prolific athletic background that includes being an All-NESCAC Conference player and NSCA All-American, Dan knows what it means to put it all out on the field. He also understands what it means to be injured yet still need to perform and show up for your team. Dan approaches each patient through a hybrid approach of manual techniques and strengthening, as well as utilizing his dry needling training. If you are an athlete looking for someone that understands and is invested in getting you back on the field, then Dan is your guy!
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Gabriella Kulikowski, PT, DPT, BRM
Gabby is a licensed physical therapist with a Bachelor's degree in Health & Exercise Science and received her Doctorate of Physical Therapy from Temple University. One of her missions is to empower women to feel confident and strong in gym spaces in order to achieve their goals! She feels very passionate about providing an inclusive, holistic, and encouraging environment for all patients and loves to meet them where they're at. Gabby enjoys working with the LGBTQIA+ community, barbell athletes, general population, and runners. As a former collegiate volleyball player, she loves to work with these athletes to prepare them for their season! Specific diagnoses that she enjoys treating patients for are chronic pain, low back pain, orthopedic injuries, sport-specific training, return-to-lifting, vertigo/vestibular conditions, and TMJ. Gabby is trained in dry needling and has a Barbell Rehabilitation Method certification! Outside of work she enjoys hiking with her pup and partner, lifting, and loves exploring new restaurants and breweries!
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Aviva Katz, Ph.D. AMK Behavioral Wellness, LLC
Dr. Katz is a licensed clinical psychologist providing evidence-based therapy focused on building mindful awareness of thoughts, emotions, and behaviors. To reach each person’s unique goals, a key part of working with Dr. Katz is identifying the things that matter to you and finding ways to create a life more connected with your personal values. This process supports people in making meaningful changes, enhancing quality of life, and experiencing joy amidst life’s challenges.
Dr. Katz specializes in treating trauma, anxiety, and supporting athletes and former athletes in navigating the unique psychological aspects of their lives through mindfulness practices, exploration of identity on and off the field, and finding meaning and purpose. In addition, she has expertise in working with military veterans and their families. To learn more and connect, go to her website at:
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Stephen Laski, DC Sports & Performance Chiropractor, Cert. Primary Spine Provider
Dr. Steve Laski aims to help people struggling with injuries and pain using movement, physical training, and lifestyle-focused plans to reclaim and take ownership of their health.
Trained formally as a chiropractor, Steve functions mainly as a coach. Whether that’s guiding through rehab for a sports or performance injury, helping build better lifestyle habits to improve health, or helping to train for an athletic event, Steve’s goal is to be the Alfred to your Batman.
In addition to joining Core Collective, Steve is currently a staff chiropractor at the NeuroSpine & Sports care center at Beth Israel Deaconess - Plymouth hospital. For more information, and to connect, email Dr. Laski at stephen.laski@gmail.com
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Ben Getman, LMHC Getman Counseling, LLC
Ben Getman is a Licensed Mental Health Counselor and an anxiety and trauma specialist. Ben's approach will help you better understand and navigate your experiences, find confidence in who you are, and build purpose for going forward. He can help you develop the tools and knowledge you need to move through life's waves with a sense of ease and presence.
Ben works well with individuals who want to get ahead in their lives but are stuck and limited by stress or other mental health challenges. To help his clients achieve their goals, Ben incorporates a blend of Cognitive Behavior Therapy (CBT), Motivational Interviewing, Internal Family Systems therapy (IFS), mindfulness, and meditation based on each client's individual and unique needs.
To learn more about Ben and to connect, check out his website: