Meet our staff

The Staff that Golfs Together Saves Together! In A Heartbeat instructors pictured left to right: Rob Collette, Owner Gretchen Nahkala, Monica Hamilton McCarthy, and Brett Wilder at a charity golf tournament in 2018.

 Gretchen Nahkala, Owner, Instructor, EMT, RDH

FullSizeRender (9)Gretchen has been in the health field as a dental hygienist for over 25 years. She became a certified CPR instructor so that she could train her coworkers, but her outgoing personality and knowledge soon put her classes in demand. As a result, she created In A Heartbeat to meet the CPR and First Aid needs of the medical field and other vocations that require safety training. In 2006, she returned to school to become a certified EMT, and currently serves as the Ambulance Director with an on-call fire department. She wears many hats, but her favorite role is that of loving wife and mother. Her husband Jeff continues to support all that she does while her kids keep her laughing.

Jeff Nahkala, Instructor, retired FF, EMT

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Jeff has been a part of In A Heartbeat since the very beginning. As a co-owner of a successful dental lab, he was very helpful when Gretchen decided to launch her business. A third-generation firefighter, Jeff recently retired as the Fire Chief for the Town of Oakham, MA after serving the department since his teens, and brings his experience as an EMT/Firefighter to his classes as a CPR instructor. Jeff relaxes by playing trumpet and spending time with his family.

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nica Hamilton McCarthy, Marketing Director, Instructor, BA

Monica joined the In A Heartbeat team in 2015 as the Marketing Director, and social media manager. She became a Heartsaver instructor in 2016 and a BLS Healthcare Provider instructor in 2017. Monica has a degree in English with a Humanities concentration from Providence College in Rhode Island, and is also a freelance writer and editor. Monica also volunteers as a fundraiser and special event planner for animal rescues and nature sanctuaries, including the Cat Rescue of Marlborough and Hudson (CaRMaH) and Capen Hill Nature Sanctuary, and plays traditional Irish music with her husband Patrick in the duo Dublin Down.

ProfilePatrick McCarthy, Instructor, BS

Patrick has been with the In A Heartbeat team since 2003. A graduate of The University of Massachusetts at Amherst, Patrick worked in the mental health field for many years. Patrick specializes in industrial health and safety, and also works as a manufacturing professional. He is also a musician and an avid outdoorsman, and is part of the Irish duo, Dublin Down, with his wife, Monica.


Brett for websiteBrett Wilder,  Instructor, EMT-B, Wilderness EMT

Brett joined the In A Heartbeat team in 2018. He also works as an emergency room technician at Marlborough Hospital. Brett is a U.S. Navy veteran where he spent six years working as military police and security. After separating from the Navy is 2012 he went on to earn a degree in Exercise and Sports Science with a concentration in Clinical Exercise Physiology from Fitchburg State. Brett is also a graduate of the Stonehearth Outdoor Leadership School (SOLO) where he earned his Wilderness EMT certification.

nate small siteNate O’Lari, Instructor, FF, EMT, BS 

Nate joined the In A Heartbeat team in 2019 as an instructor after graduating Anna Maria College with a Bachelors Degree in Fire Science. Nate has been a nationally registered EMT for 3 years and is currently enrolled in Anna Maria’s paramedic program. He serves the towns of Oakham and Orange as a call firefighter and EMT and is our new Instagram editor. Follow our Instagram page to say hello to Nate!

Rob Collette, InstructorIMG_2577

A registered firefighter/EMT, Rob has his degree in electronics and works in field service. He got his start in emergency medical treatment in 1992 while serving on the medical response team for AstraZeneca.  Having seen firsthand how effective CPR can save someone’s life, Rob decided to join the In A Heartbeat team to share his experiences.


Jake Nahkala, Instructor, FF, EMT

FullSizeRender (13)Jake graduated with a Fire Science degree from Southern Maine Community College. He has completed training at the Fire Academy in ME and become a nationally registered EMT. Jake is also a certified lifeguard, Captain on the Oakham Fire Department, and is a training officer there. He also works full-time as a Firefighter/EMT for MassPort. He enjoys spending time outdoors and helping others.



Greg Davis, Instructor, RN, Pediatric Intensive Care Unit

Version 2A pediatric nurse at Boston Medical Center in their ICU, Greg joined the staff of In A Heartbeat in 2016. A graduate of Worcester State University, Greg is the Head U12 Ski Racing Coach for the Wachusett Mountain race team. He also spends time paddle boarding, fly fishing, and participating in shooting sports.



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