Our Team

Washington D.C. (Shaw Location)

Expertise

We are a group of fitness and nutrition fiends that love learning new methods, theories, and techniques within the industry. As a team, we come from a diverse set of backgrounds, from physiology and exercise science, to kinesiology, to even business and psychology.

We’re all athletes in our own realms – powerlifter, figure competitor, marathoner, and swimmer. We’ve all realized that regardless of what your fitness/health goals are…you’re much better off if you know where you are, so you can know where you want to get to!

Meet our leaders

We are athletes, health nuts, and science nerds.

Tiffany Harlan

Tiffany Harlan

Founder/CEO


Tiffany Harlan started Composition ID in January 2014 and brings over 12 years of experience in the fields of preventative health, fitness, aging, exercise physiology and advanced diagnostic testing. Most recently, Tiffany has worked alongside multiple physicians for one of the top age management institutes in the nation, specializing in elite performance testing, exercise and nutrition programming; while at the same time growing and managing a new local health club as the Fitness Director for a large spa and wellness industry provider.

She is passionate about providing clients with as much information as possible about their bodies. And teaching and empowering them with that data to ensure that her clients are achieving the results that they set out to accomplish.

She holds a degree from the University of Maryland in Kinesiology and is a certified personal trainer, Spin instructor and nutritionist. She is the proud mother of three daughters and now calls Maryland home.

In her free time, she can be found binge watching the Bachelor (with a cup of strong, no-BS black coffee) or playing the role of director for her daughter's Beyonce and Shakira dance routines.

Dr. Thomas Clarke

Chief Medical Director


Thomas Clarke, M.D., MPH is the Medical Director of Medical Fitness Professionals and a certified Cenegenics physician. He has 27 years as a USAF physician focusing on Human Performance Optimization, with experience caring for some of the most highly trained Special Operations Forces of the U.S. military; and under some of the most difficult conditions imaginable.

He was trained at the Uniformed Services University of the Health Sciences and the USAF School of Aerospace Medicine where he was valedictorian of his medical school class and chief resident of his resident class. Dr. Clarke is board certified in Preventive Medicine and Aerospace Medicine, and is physician certified by Cenegenics Medical Institute.

His experience provides a broad and unique perspective on health, wellness and performance optimization. He has a true passion for functional training, exercise, nutrition, and health; practicing the lifestyle he recommends. He truly enjoys assisting his clients as they realize their true potential and maximize their health, wellbeing and vitality.

Eva headshot

Eva Meier

Director of Human Performance


Eva has been involved in different parts of the health and fitness industry from a young age. Beginning ballet at the age of 7, dance had been her primary form of fitness throughout her youth and into her college career. When Eva got to university, she developed a passion for weightlifting and shortly after got her CPT from the National Council of Certified Personal Trainers. Her fitness philosophy is to train for ease of movement and longevity, which is largely influenced by her dancing roots. You'll constantly find her in the gym rolling around on the floor and creating exercises with therabands and dumbbells. Eva graduated from the University of IL - Chicago with a Bachelors in Communications. She is a Washington, DC native and is happy to be back in the Capital.

We connect fitness and health through comprehensive data analysis

Insights from our blog

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Lessons from Nature: The Power of Nutrition & Mindset along the Country’s Toughest Terrains

Matthew Stofko, also known as Pinwheel PCT, pushes the limit. An avid hiker, Matt has taken on two of the most famous U.S. trails in the past 6 years: the Appalachian Trail and Pacific Crest Trail. However, according to Matt, both experiences were worlds apart. Read on to learn more about how two different approaches…

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No Time? No Problem. Last-Minute Healthy Thanksgiving Dishes to Save the Day

The holidays are a rush. And we’re not just talking about traffic. When life gets in the way of planning “the big meal,” we’ve discovered five of the quickest (and healthiest) dishes to balance tradition and your busy lifestyle. Shaved Brussel Sprout Salad What’s easier than throwing a pre-cut bag of shaved Brussel sprouts into…

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Client Transformation: Sherry Yu, Washington, D.C.

Back with another client perspective from our series of body composition transformation journeys with precision nutrition! We’ve been asking Composition ID clients how they have used strategic nutrition planning to transform their body composition. We were curious which plan worked best to reach their goals, and what advice they would give to anyone focusing on…

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