Tom is the author of Beat the Gym: Personal Trainer Secrets Without the Personal Trainer Price Tag [William Morrow 2011] The Marathon Method [Fair Winds Press 2007] and The 12-Week Triathlete: Train for a Triathlon in Just Three Months [Fair Winds Press 2005]. He is represented by literary agent Lauren Galit at the LKG Agency.

He is the host of the new best-selling 10 DVD series Supreme 90 Day and co-host of the soon-to-be-released 12-DVD series, Herbalife 24. He also hosted the Abs Diet Workout as well as starring in his own DVD series: Tom Holland's Total Body Workout, Tom Holland's Total Body Workout II and Tom Holland's Total Ab Workouts. Tom is represented by Wilhelmina Models in the fitness division.

Tom is on the Board of Advisors for Oxygen Magazine and has contributed to media including The New York Times, The Los Angeles Times, Men's Health, Men's Journal, Runner's World, Women's Health, Newsweek, Men's Fitness, Fitness, Hers, More, Cosmopolitan, Family Circle, The NY Daily News, Muscle Media, Prevention, AARP, Bride's, Organic Style and Cooking Light. He has written articles for such magazines as SELF, FIT, The Journal of the American Athletic Association, Inside Triathlon, Running Times, American Fitness and IDEA Personal Trainer.

Tom received his BA in Communications from Boston College and his Master's Degree in Exercise Science and Sports Psychology from Southern Connecticut State University. He is a Certified Strength and Conditioning Specialist certified by the National Strength and Conditioning Association [NSCA-CSCS] and has also been certified by the American College of Sports Medicine [ACSM] the American Council on Exercise [ACE], the National Academy of Sports Medicine [NASM] and the Aerobics and Fitness Association of America [AFAA]. Tom is a Level 3 coach with USA Cycling and is a member of the Association for Applied Sport Psychology.

He began as a personal trainer and fitness instructor in New York City, working at such facilities as the Reebok Sports Club, Equinox, Crunch, The New York Sports Clubs and the Cardio Fitness Center. He then struck out on his own, founding TeamHolland LLC in 1998 and expanding into new areas of the fitness industry. He opened his first gym, The Tom Holland Athletic Club, in New Canaan, Connecticut.

An elite endurance athlete himself, Tom has been a member of PowerBar's Team Elite since 2003. He has run over 50 marathons including races in Italy, France, Ireland, and Hawaii. He is a sub-3 hour marathoner and winner of  the 2007 Dutchess County Marathon.  Tom has run several ultra marathons including a 9th place finish at the "Run to the Sun" ultra marathon, a 36-mile run from sea level to the 10,023 foot summit of Haleakala on the island of Maui, and the JFK 50-mile ultra. He is also an 19-time Ironman triathlete with a PR of 9:56, having competed in Ironman China, Malaysia, South Korea, New Zealand, Australia, Germany, Florida, Arizona, Kentucky, Lake Placid and California. Tom has won several natural bodybuilding awards and has competed in adventure races as well.

Tom serves as the coach for the Multiple Myeloma Research Foundation’s, (MMRF) Endurance Events Program.