Meet the Team!
At Anna Marjanovic Fitness LLC, we’re proud to have a diverse team of professionals, each bringing their own specialty to help you reach your goals. No matter where you are in your fitness journey, we have the right coach to guide, challenge, and support you every step of the way.
Anna began her journey in the fitness industry several years before launching her own business in early 2020. What started as outdoor group exercise classes under a tent quickly grew... first into a small private gym in East Northport, and now into a full-scale fitness studio in Northport.
Anna holds a Bachelor of Science in Fitness Development and Kinesiology from SUNY Cortland. She is a NASM Certified Personal Trainer and a GGS Certified Pre & Postnatal Coach. She is one of only 16 people in NYS to hold this Pre Natal and Postpartum certification. In addition, she is a NETA Certified Group Exercise Instructor, Certified TRX Coach, and certified in KILO Program Design, CPR/AED/First Aid, and Myofascial Release Foam Rolling. Her credentials also include certifications in PROnatal Prenatal Fitness, NETA’s Exercise for Parkinson’s and MS, as well as Youth and Senior Fitness.
Anna brings a wealth of hands-on experience, from being a personal trainer at Life Time in Garden City, to having completed a three-year Athletic Training Internship and a 500-hour Strength and Conditioning Internship. Always committed to learning and growing, she is currently enrolled in a Stretching & Flexibility course to continue providing top-level care and expertise to her clients.
Liam is a certified and licensed athletic trainer with a Bachelor’s degree in Athletic Training from the University of Tampa and a Master of Science in Athletic Training from A.T. Still University, where he focused on rehabilitation. He is currently pursuing his Doctorate in Athletic Training (DAT) at A.T. Still University with an emphasis in orthopedics and sports neurology & concussions. He also holds certifications through the National Academy of Sports Medicine (NASM) as a Certified Personal Trainer (CPT) and Corrective Exercise Specialist (CES).
Liam brings experience from working with NCAA Division I football and NCAA Division II men’s and women’s lacrosse and basketball, as well as private Christian and public high school athletes. His approach blends high-level athletic performance training with clinical rehabilitation principles.
As a purple belt in Brazilian Jiu Jitsu and a 2025 half marathon finisher, Liam understands both the grind of performance and the process of recovery. He’s also a strong advocate for mental health, believing that training should build not only the body, but the mind and spirit as well.
Whether you’re bouncing back from injury or pushing for your next level of performance, Liam is committed to helping clients move better, feel stronger, and stay ready for whatever life throws their way.
Meet Lisa, a registered dietitian and lover of all things food. With over 14 years of experience specialized in every aspect of lifestyle change, medical and surgical weight management, Lisa has worked with thousands of men and women with a desire to change their habits and improve their lives long-term. Her passion lies in helping clients feel empowered through nutrition with evidenced-based guidance and ongoing support, equipping them with actionable strategies and sustainable tools to thrive.
Lisa’s approach is simple, realistic, collaborative, and compassionate. She’ll meet you where you’re at…not where you think you should be. As a working mom to a wild little boy and a law enforcement and military spouse, she knows a thing or two about hectic schedules and the challenge of juggling it all. Lisa is committed to helping you navigate your journey with clarity and confidence - cutting through all the BS and focusing on what’s important to YOU so you can feel your best!
Lisa earned her Bachelor’s Degree in Nutrition and Dietetics from LIU Post, graduating summa cum laude. She went on to complete both her Dietetic Internship and Master’s Degree in Nutrition at LIU Post, with a concentration in weight control and exercise physiology.
Christie resides in East Northport for eight years now. With over 20 years of dedication to fitness, Christie’s journey began with a sense of obligation and transformed into a true passion - what once felt like “I have to work out” became “I can’t wait to move!” Her goal is to help others find that same joy in movement, focusing on feeling good, building strength, and most importantly - having fun.
Christie is a NETA Certified Group Exercise Instructor and holds a Menopause Specialty Certification as well as a Kettlebell Certification and is CPR, AED, and First Aid certified. She is enrolled in many courses, demonstrating her commitment to lifelong learning and inclusive fitness for every stage of life.
With a Bachelor’s Degree in Psychology, Christie brings a holistic approach to wellness that supports both body and mind. Her background enhances her ability to connect, motivate, and create a welcoming space for all fitness levels.
Inspired by her longtime mentor Anna Marjanovic-Heinzman, Christie has spent over four years honing her skills and now channels that inspiration into helping others thrive. Her classes are a blend of positivity, energy, and empowerment—you’ll leave sweaty, smiling, and ready for more!
Join Christie for a group class that celebrates strength, community, and the joy of movement.
Lili Buscareno is a 200-hour certified yoga teacher and Health and Physical Education teacher with a deep commitment to guiding students through purposeful, breath-centered movement. Her teaching is rooted in creating a strong foundation, both physically and mentally, to support sustainable growth on and off the mat. With experience coaching girls’ soccer teams of all ages and completing the 2023 NYC Marathon, she brings an athletic perspective to her classes while staying centered in the principles of mindfulness and presence.
Her passion lies in helping people develop a deeper awareness of their bodies, using yoga as a tool to reconnect with strength andcalm. She believes that consistent, intentional movement has the power to shift not just how we feel physically, but mentally. Through her classes and coaching, she’s committed to building a community that celebrates strength, self-awareness, and the transformative power of mind-body connection.
Certified Athletic Trainer | Marathon Runner | Running Coach | Sports Performance Specialist
Courtney brings over a decade of experience in endurance sports and athletic performance to her role here. A certified athletic trainer with a bachelor’s in Health Science and a master’s in Athletic Training, she is currently pursuing her doctorate in Sports Performance Psychology—deepening her commitment to both the physical and mental aspects of athletic success.
A former Division I lacrosse player and multiple-time marathon finisher, Courtney understands firsthand what it takes to perform at a high level while staying healthy. She specializes in injury prevention, mobility, and running mechanics, and performance enhancement, with a passion for helping runners and athletes reach their goals in a safe, smart, and sustainable way.
Whether you're training for your first 5K or chasing a PR, Courtney is dedicated to guiding you with evidence-based practices and personalized support that prioritizes your long-term health and performance.