A.J. Peak


Founded Peak Dental Services in 2008. Under A.J.’s leadership the company has been recognized as one of Inc. Magazines Top 5000 fastest growing companies. He has been 1 of 3 finalists as Small Business Person of the Year by the Pikes Peak Small Business Development Center. A.J. received his MBA from The Kellogg School of Management at Northwestern University and BA in Business Administration from Carnegie Mellon. Prior to starting Peak Dental Services, A.J. worked at Merrill Lynch as a senior business analyst and with McKinsey & Company for 7 years as an Engagement Manager. While with McKinsey & Company he supported over twenty Fortune 500 C-suite executive teams on a variety of strategic initiatives ranging from service operations, pricing, strategy, and M&A. In his free time, he enjoys spending time with his wife, training for triathlons, and reading nonfiction books.


Peter van Riper

Chief Financial Officer – Board Member

Prior to joining Peak Dental Services both as an investor and CFO, Peter was the CFO of Firstsource USA, healthcare outsourcing business and CFO of Privia Health, a physician-group management start-up. In addition, he was Vice President Accretive Health whereby he held roles in Finance, Operations, and New Product Development while the company went through the startup phase to IPO. Earlier in his career he spent time working for the Advisory Board as well as a consultant with the Boston Consulting Group. He has a BA from Brown University, MA in International Economics from Johns Hopkins, and MBA from Wharton.

Outside of work, he spends time with his wife Kris, and their three sons managing a busy schedule of many activities, including sailing on the Chesapeake.

Amber Collins

Amber Collins

VP of Operations

Amber has been dedicated to the growth of Peak Dental Services since 2009 and has extensive knowledge of operations and the dental field. Her focus has been growing and scaling operations, building a positive culture, training teams by designing, writing, and implementing extensive training programs, as well as building and developing teams to support growth. Amber is a Colorado native and loves the outdoors. She enjoys spending time running around doing fun activities with her toddler. She is currently a MBA candidate for 2021.

Sam Shrank

Sam Shrank

VP of Finance

Sam has been with Peak since 2018, and helps manage operational analysis, budgeting and forecasting, M&A, and anything else that requires an analytical mindset. Before Peak, Sam held various finance and strategy-related roles in the energy industry. He holds Bachelors and Masters degrees from Stanford University. Sam lives in Boulder with his wife and son, and enjoys walking out of his house and into the mountains at every opportunity.

Krystal Than

Krystal Than

Chief HR and Compliance Officer

Krystal joined Peak Dental Services in 2019 and is thrilled to be a part of Peak’s rapid growth strategy. She holds a strong belief that healthy relationships are the north star to overcoming the biggest obstacles. Her role supports the continual process of championing a high performance culture that is both challenging and engaging.

Prior to joining Peak in 2019, Krystal worked in several industries over the course of 18 years, ranging from startup to Fortune 500. Her experience in building process, infrastructure and collaborative environments as the human resources leader is key to the overall business mission. Krystal has been involved in non-profit work for over 20 years. She currently serves as a Board Member to Firefly Autism and The Women’s Bean Project. In addition to her professional life, Krystal is a proud wife to her husband Van and mother to their son, Tyler.

Orly Rabin-Pantz

Orly Rabin-Pantz


Orly joined Peak Dental Services in 2019 and brings with her extensive experience in accounting & tax, financial analysis and operational management of multi-national companies. She is recognized as a change agent who can apply her comprehensive expertise in all aspects of accounting, auditing and financial management to implement solutions that improve the bottom line. Outside of work, Orly plays basketball, goes to art shows and enjoys listening to music and meditating.

Dr. Douglas Peak

Dr. Douglas Peak

Clinical Director – Board Member

Long before Peak Dental Services, Douglas Peak was a kid in rural Minnesota working his way through dental school by helping his dad, a carpenter, build & design houses. Interestingly he now spends much of his time designing & building dental practices. Dr. Peak opened his first practice based on the values of putting patients first and creating an environment in which his employees felt valued. Back in Minnesota, his most junior employee was with him for over 15 years! In 2003, he & his wife decided to make the move from Minnesota to Colorado Springs to be closer to their two granddaughters.

Dr. Peak is a graduate of the University of Minnesota Dental School, Former Naval Officer, and has his fellowship in the Academy of General Dentistry.
He has been married to Kathy Peak for over 40 years. They have two sons, David and A.J.

Dr Scott Frederick

Dr. Scott Frederick

Clinical Director

Dr. Frederick has been with Peak Dental Services since 2011. He currently serves as a board member for the American Academy of Clear Aligners. He is a member of the AGD, ADA, CDA, MDDS, and Colorado Springs Dental Society.

Dr. Frederick is married to Dr. Anna G Frederick. Together they have a daughter, Zoe, a chocolate lab named Elphaba, and another rescue dog named Stella. In his spare time, Dr. Frederick likes to play tennis, goes fly fishing and skiing with the family.

Dr. Michael Zachar

Dr. Michael Zachar

Specialty Clinical Director

Dr. Zachar is a Board Certified (Diplomate of the American Board of Oral and Maxillofacial Surgeons) oral and maxillofacial surgeon. He is a member of the American Association of Oral and Maxillofacial Surgeons. Dr. Zachar is married and has two children. He enjoys spending time with his family, playing golf, pickleball and cheering for the Iowa Hawkeyes and Chicago Cubs.

Dr. James Fischer

Dr. James Fischer

Clinical Director

Dr. Fischer is a graduate from the University of Nebraska, where he received his Bachelor’s in Biology. He went on to receive his Doctorate from the Creighton School of Dentistry in Omaha and has been practicing dentistry for the past 20 years. He is a member of the Academy of General Dentistry and stays up to date in all phases of dentistry.  Dr. Fischer grew up in the state of Nebraska playing sports through college and is an avid sports fan. In his free time, he enjoys mountain biking, playing golf, and loves spending time with his wife and their two dogs, an Irish Wolfhound and a Komondor.

Dr Carrie Mauterer

Dr. Carrie Mauterer

Clinical Director

Dr. Mauterer is a prominent figure in the Colorado dental community and is an advocate for building a strong healthcare community. She was honored to be awarded fellowships in both the Pierre Fauchard Society and the International College of Dentists. For four years she served the local Metropolitan Denver Dental Society (MDDS) board. While serving as the editor of the Articulator Magazine, she published dozens of her editorials and won two awards from the International College of Dentists for her editorial work. She has served the American Dental Association in the positions of Alternate Delegate and Delegate (elected by her peers) for a few years.


Andrea Small

Regional Director of Operations

Andrea is the general manager for Colorado Springs.  She is a skilled operations leader with extensive experience managing a wide spectrum of operational activities within a dental support organization. Andrea holds a bachelor’s degree in Engineering Design and Associates in CADD from Cameron University.

When Andrea is not working, she loves spending quality time with her family.  Andrea married her high school sweetheart, Reggie of 12 years.  They have 2 beautiful kids, Reganice and little Reggie.


Anita Gomez

Regional Manager

With 16 years of experience in the dental field, Anita is passionate about being a practice manager. One of the things she enjoys most about dentistry is to see how changing a patient’s smile can transforms their life. Anita has a husband and two sons that enrich her life every day. Whether it’s traveling or playing around the house, they make her heart smile.


Michael Robinson

Regional Manager

Michael is a Colorado native. He attended the University of Northern Colorado, where he received his bachelors in Marketing, and a minor in Speech Communication. His favorite part about working in the dental field, is helping change patients lives. Outside of the office, he enjoys spending time with his family, riding motorcycles, and is known to be a sports junkie.


Jody McGrath

Regional Manager

Jody began her career as a nurse and after the birth of her first son made the transition over to the dental field and never looked back. She joined Peak Dental in 2015 with 26 years experience as a Practice Manager. She is passionate about getting to know all of our patients and making sure they receive the best care possible.

She married her high school sweetheart Dale and together they eave 2 sons, Kyle and Sean. In her leisure time she is an avid reader, loves to travel and enjoys spending time with her Min Pin, Pepi.

Alysia Stiletto

Alysia Silletto

Regional Manager

Alysia is a Colorado native growing up in Morrison, Colorado. After spending 11 years in healthcare staffing/consulting, Alysia made the move to join Peak Dental Services as a Regional Manager for the Colorado market. Alysia has a passion for leadership and development of teams to work with goals and vision to help them grow professionally and personally. When Alysia is not working she spends time with her two daughters, Allenah and Delaney. Volunteering at the Children’s Hospital in their Cardiology department is a big part of her life and she is a board member of a parent education and support group for kids born with Congenital Heart Defects.


Sarah Medina

Director of Onboarding and Call Center

Sarah has worked in the dental industry for 13 years, joining Peak Dental Services in 2013. She has since served the organization in various leadership roles, while constructing best-in-class receivables processes, developing and executing staff training programs, along with establishing and expanding our Shared Service Center. As Director of Operations for Shared Services, Sarah manages our Accounts Receivable team and Shared Services Center. In her free time, she enjoys spending time with her husband, three kids and two dogs. When she’s not enjoying hobbies such as hiking, painting or nature photography, she can be found engrossed in a Lord of the Rings or Star Wars marathon.


Nikki Cordova

Equipment & Supply Manager and Dental Assistant Coach

Nikki’s passion is giving those who desire a perfect smile, the reason to smile. Her favorite thing to do is laugh, and have been told you can hear it coming a mile away. Nikki has been instrumental in building the Colorado Dental Assisting School from the ground up, installing efficient dental supply management process across Peak Dental Services network of offices, and serving as Dental Assistant Coach to Peak Dental Service’s network of offices.

Outside of work Nikki enjoys spending time with her 2 daughters and husband. You can find her outdoors, watching football and enjoying the Colorado Breweries.

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