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

2560 2057 Shannon Miller

How to Support the Immune System with Nutrition

Wash your hands, keep your distance, stay inside: the typical script we’ve been hearing from officials as ways to protect ourselves from viruses like COVID-19 and other pathogens. Physical barriers and germ-fighting efforts are extremely beneficial, however, our bodies have a powerful immune system that, when optimized nutritionally, can be another first-line of defense against…

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2560 1702 Shannon Miller

4 Strategies for Staying Healthy During the COVID-19 Pandemic

The COVID-19 pandemic has disrupted much of our daily lives, and with this comes uncertainty around how to maintain healthy fitness and nutrition habits to stay on track with goals – while still staying safe from the virus. However, just like the over-pouring of news headlines, the influx of recommendations for staying healthy can be…

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2560 1707 Shannon Miller

What is “Essential Fat” and Why Do Women Have More?

Have you ever wondered why women tend to have higher body fat percentages than men? Are you a relatively fit woman who measured your body composition and were shocked that your number was in the mid or even high 20’s for fat mass percentage? Heather Huntsman, Ph.D., CSSC, explains the differences between men and women…

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