Meet the Team

Alissa Rumsey, MS, RD, CDN, CSCS

Nutrition Therapist and Certified Intuitive Eating Counselor


I love to eat. I mean really love it. Freshly baked bread. Creamy, soft, cheese. A red, ripe tomato. Chocolate chip cookies right out of the oven. Handmade pasta topped with truffle butter. I’m drooling just writing this! As a foodie, and an anti-diet dietitian, I believe that diet should be defined by what you eat – not by what you can’t.

I am a Certified Intuitive Eating Counselor and specialize in intuitive eating, body acceptance and recovery from chronic dieting and disordered eating. My philosophy is rooted in the Health at Every (HAES®) approach, as I believe that true health comes from nurturing behaviors to enhance physical, mental and emotional wellbeing – not by following external food rules or a number on the scale.

This wasn’t always my approach. I started out practicing from the “traditional” nutrition model – recommending portion sizes and calorie levels, creating meal plans, tracking my client’s weight. It always worked for a little while but over time I realized that, despite my client’s best efforts, no one was able to maintain the “lifestyle changes” that I believed I was teaching them. Inevitably they’d go back to their prior eating habits and feel like they failed. I too felt like a failure – how come I couldn’t help them?

Everything changed after I took a course on intuitive eating.

I immediately realized why my approach wasn’t working for people in the long term. I was telling people to listen to their bodies, yet I was giving them prescriptive meal plans. I was saying, “listen to your hunger and fullness cues” yet I was suggesting they not go more than X hours without eating. Everything we worked on still revolved around external, rather than internal, cues. This kept them stuck in the restrictive diet cycle – limiting foods or food portions, followed by overeating or “failing”, which led to guilt and then want to get “back on the wagon”. Clearly, this wasn’t working.

I spent the next several months doing one-on-one training on intuitive eating and the non-diet, Health at Every Size Approach. Once I started practicing this new approach with my clients, everything shifted. This was most apparent while working with several people who I had worked with while still practicing my “old” approach. They came back to me – feeling like they had failed – and signed on to work with me using my new intuitive eating and body acceptance approach. The changes that occurred in them this time around were mind-blowing. Despite the fact that we had previously worked together for several months in the past, so many pieces of their food and body history came out that we had never discussed before. These were parts of their history that were deeply rooted and affecting so much of their current experience with food. And now, working from an intuitive eating, weight-inclusive approach, they were able to heal their relationship to food and their bodies, find true food freedom and create positive health habits from a place of self-care instead of self-control.

As an intuitive eating dietitian nutritionist, my goal is to help you reconnect with your internal body cues, build back body trust, and cultivate a healthy and peaceful relationship with both food and your body. With this approach, you will discover the nutrition and self-care behaviors that will help you to nourish yourself and to thrive – for the long run.

Professional Bio:
Alissa Rumsey MS, RD, CDN, CSCS is a nationally recognized and award-winning registered dietitian nutritionist and the founder of Alissa Rumsey Nutrition and Wellness P.C. Alissa specializes in intuitive eating coaching, body acceptance and disordered eating recovery. Her philosophy is rooted in the anti-diet and Health at Every Size (HAES®) movement, as she believes true health comes from nurturing behaviors to enhance physical, mental and emotional wellbeing. As a Certified Intuitive Eating Counselor (Trained & Certified by the Original Intuitive Eating Pros), she helps people who are frustrated with dieting cultivate a healthy and peaceful relationship with food and their bodies.

As a freelance writer, speaker, and spokesperson, Alissa’s expertise is regularly featured on television, online, and in print. She is a monthly contributor to US News and World Report and has appeared in over 100 media outlets including NBC Nightly News, CNN, CBS News, ABC News, Prevention, Health Magazine, SELF and Women’s Health. As a past spokesperson for the Academy of Nutrition and Dietetics, she represented a national association of over 100,000 Registered Dietitians and nutrition professionals. In 2017 she received the Media Excellence award from the New York State Academy of Nutrition and Dietetics.

Alissa is also passionate about empowering dietitian entrepreneurs to confidently start, grow and scale their businesses. She has spoken at professional meetings and events around the country including the Academy of Nutrition and Dietetics Food and Nutrition Conference and Expo (FNCE), Today’s Dietitian Symposium, the Texas Academy of Nutrition and Dietetics Annual Conference and Expo, the California Academy of Nutrition and Dietetics Annual Conference and Expo, the Florida Food and Nutrition Symposium, and more. In 2017 she launched the Dietitian Entrepreneur Mastermind Retreat, a weekend workshop that brings together dietitians from around the country to connect, collaborate and work on their businesses.

Alissa earned dual Bachelor of Science degrees in Dietetics and Exercise Science from the University of Delaware and a Master’s of Science degree in Health Communications from Boston University. In her spare time, Alissa can be found traveling to far-off countries, and, as a self-proclaimed “foodie,” exploring the expansive New York City food and restaurant scene.

Brenna O’Malley, RD

Nutrition Therapist and Intuitive Eating Dietitian Nutritionist


Brenna O'Malley dietitian nutritionist

When it comes to nutrition, I’m a firm believer in three things: that we can feel our best without feeling obsessed, our relationship with food and our body is as important as what we put into our body, and that nutrition doesn’t need to be confusing or complicated. With so many diet messages available to us, we hear a lot about the specifics of food, but rarely give enough credit to the importance of having a healthy relationship with food to put that information to use in a healthful way.

I never gave much thought to my relationship with food growing up – or even thought that my relationship with food was something to think about. I grew up playing sports, having all foods as a part of my diet and not thinking much about it. The first time I really remember paying attention to what I ate was in high school when a series of stomach issues led me to adopting a gluten-free diet and seeing a registered dietitian. This was the first time I had ‘rules’ around foods and gave me a new perspective on the connection between what we eat and how we feel. I loved my relationship with my registered dietitian, she was such a support and source of information in navigating my relationship with food that I realized I wanted to offer that same positive, personalized support to others. While studying nutrition, I discovered the research and personal effects of mindfulness and intuitive eating and haven’t looked back. My goal as an intuitive eating dietitian nutritionist is to help you develop a positive relationship with food and your body so you can feel your best.

Professional Bio:

Brenna O’Malley, RD, is a registered dietitian and founder of the mindful health website, The Wellful. Brenna specializes in helping people move away from dieting and disordered eating patterns to develop a healthy relationship with food and their body. She is passionate about changing the language we use to talk about nutrition and health in the media, online and in food marketing. Brenna uses a non-diet, mindful approach to nutrition and health and believes that the ‘why’ we eat is just as important as the ‘what’ we eat. Brenna practices from a Health at Every Size (HAES®) perspective and truly believes that all foods can fit in a healthy diet. Brenna started The Wellful’s Women in Wellness Podcast where she features female entrepreneurs who are changing the food, health and wellness landscape. She consults for food and media companies and her writing has been featured in POPSUGAR, Boston Voyager, My Life OOO and Spoon University. Brenna loves to travel, explore new coffee shops, try fun workout classes and there’s no food she won’t try, at least once!

Brenna completed her Bachelor of Science degree in Nutrition and Dietetics at New York University and completed her dietetic internship at Massachusetts General Hospital with a concentration in media and intuitive eating.

Anne Mittnacht, MPH, RD, RYT-500, TCTSY-F, CEDRD-S

Nutrition Therapist & Certified Eating Disorder Registered Dietitian


After visiting Alice Waters’ Edible Schoolyard at a large public middle school in Berkeley, California and watching the students make a meal with food that they had grown, I decided that I wanted to pursue a career in public health and nutrition. I wanted to become a part of programs that help children to develop a positive relationship with food early on. As an Eastern Religion major, my focus as an undergraduate was based in the Humanities. It wasn’t until I was preparing for my graduate school studies in Nutrition and Public Health that I discovered that I love nutritional biochemistry – how our bodies digest, absorb and utilize nutrients that come from the foods we eat.

One might assume that learning about the science of nutrition would have driven me to seek out and only recommend the most highly nutritious food choices. On the contrary, it helped me to see that all foods can truly fit into a healthy relationship with food. I quickly realized how much of my understanding of nutrition was influenced by our diet driven culture and that most of the information that informs restrictive approaches to eating is rooted in pseudo-science or just blatant misinformation. I also started to realize how this information draws us away from our body’s innate ability to eat what it needs.

In my graduate program, I learned how to read the research and distinguish strong studies from weaker ones. One of my favorite things to do with clients is to debunk modern diet/nutrition myths – most of them promising immediate results and great health. I ask my clients to bring me claims about foods and nutrients that they have heard about and that may inform their approach to eating and we go straight to the science – we look at research that supports the claim (often times, there isn’t any) and determine if it is credible. I also present any evidence that I know of that may dispute the claim.

My approach to nutritional counseling and to eating disorder treatment aims to bring the joy of eating back to the table. I believe that a truly healthy, intuitive relationship with food is one that is non-restrictive and that includes all foods and nutrients, that the best option on a menu is the one that you are in the mood for, that feeling satisfied at the end of meal is just as important as feeling satiated, and that eating a meal can be just as much about gathering together and ceremony as it is about the food and nourishment.

Professional Bio:

Anne Mittnacht, MPH, RD, RYT-500, TCTSY-F is a Certified Eating Disorders Registered Dietitian (CEDRD-S) through the International Association of Eating Disorder Professionals (IAEDP).

Anne provides nutritional counseling to individuals who are struggling with eating disorders and disordered eating, to chronic dieters who are interested in exploring a non-diet, intuitive approach to eating, and to children and families. Anne’s food philosophy and approach to counseling draws on Intuitive Eating and Health at Every Size® principles, and on Ellyn Satter’s Feeding Dynamics Model.

Anne is also a certified Sivananda Yoga Instructor and has received specialized training in Curvy Yoga and in Trauma Center Trauma-Sensitive Yoga (TCTSY).

In addition to her work at Alissa Rumsey Nutrition and Wellness, Anne provides in-person nutritional counseling at Metrowest Nutrition, an outpatient nutrition group in Newton Center, MA. She also substitute teaches Trauma Sensitive Yoga at The Trauma Center in Brookline MA and, when appropriate, integrates this approach into her in-person nutrition sessions with clients.

Anne completed her Bachelor of Arts degree at Middlebury College where she studied religion. She completed her graduate work in public health and nutrition at The University of North Carolina at Chapel Hill. While at UNC she was the lead investigator on a study that she conducted with Cynthia Bulik (a leading researcher in the field of eating disorders) that evaluated the consensus on nutrition counseling practices among registered dietitians treating individuals with anorexia nervosa, and findings were published in the International Journal of Eating Disorders.

Christine Téllez, MS, RD, LDN

Nutrition Therapist and Registered Dietitian


Christine Tellez intuitive eating dietitian nutritionist

When I first began my journey as a dietitian, I never knew that there were possibilities beyond what I learned in school, which focused on weight loss and individual changes. My first job as a dietitian was working at a university with college students, and this is when I first delved into the world of eating disorder treatment. I listened to students telling me about their “healthy eating habits” that quickly spiraled into food and body obsession and took over their lives. I realized that I needed to change not just the way I practiced as a dietitian, but also examine my own relationship to food and my body.

After my dietitian crisis, I began to explore other alternatives. I completed Intuitive Eating training with Evelyn Tribole, started following non-diet and anti-diet dietitians on social media and learned about the Health at Every Size approach. With ongoing training and supervision, I was able to start doing work that helped my clients heal from their eating disorder/disordered eating and improve their relationship with food. Instead of focusing on calories and super foods, I now help clients relax around food and approach eating from a place of connection to others and to culture.

My approach to the work I do with my clients is to foster a collaborative and supportive relationship. I will challenge you and stay in the discomfort that may come up in sessions. I also work from an anti-oppression, anti-racist and queer feminist lens, and think that body liberation is only possible when we are living in a just world.

Growing up as a Cuban and Nicaraguan daughter of immigrants, I know firsthand how inaccessible working with a dietitian can be—whether because of money, language, or just not finding anyone that can relate to your lived experience. I am fluent in Spanish and passionate about working to increase access to care for all who need it.

Professional Bio:

Christine Téllez MS, RD, LDN is a bilingual dietitian based in Miami, Florida. Christine specializes in eating disorder recovery, GI issues such as IBS and IBD, and PCOS. She is particularly interested in the brain-gut connection and the relationship with disordered eating. Christine practices from a non-diet and fat positive lens, and helps her clients heal their relationship with food and their bodies.

In addition to her work with at Alissa Rumsey Nutrition and Wellness, Christine also works part-time at the Miami VA Medical Center as an outpatient dietitian. In 2019, Christine helped to establish an Eating Disorder treatment program for Veterans struggling with eating disorders as previously, there were limited options for treatment in the community.

Christine earned her Bachelor of Arts degree in Philosophy and English from Simmons College and her Master’s in Nutrition and Dietetics from Florida International University. She is a mom of 2 and in her free time enjoys reading, going to the beach, and exploring Miami.

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