Find out more about our coaches here.

NathanNathan Zigler, Owner

I was born in Columbus Ohio and moved to Arizona when I was five. I’ve been involved with athletics my entire life, playing Pop Warner football, Little League baseball, basketball, track, BMX racing, mountain biking, scuba diving, shooting trap, weightlifting and martial arts. I am the owner and head instructor of Gracie Arizona Brazilian Jiu Jitsu Academy located here in Phoenix since 1999. I’m married to my high school sweetheart Lanie Zigler since 1991 and have twin daughters, Zoe and Parker.

In my free time I enjoy anything that can be done outdoors. I’m an avid fisherman, and during the summer you can find me at the lake fishing from my jet ski just about every weekend. I love camping on the Mogollon Rim with my family as well as making several trips to Rocky Point for more fun in the sun. I also love to ski and snowboard, so you can say I enjoy pretty much anything you can do outdoors.

I was introduced to CrossFit around 2010 by a student of mine. I ran track and I’ve always enjoyed lifting weights as well so when he told me what was involved, I had to give it a try; I was hooked from the first class. I was certified Level 1 in 2012 and opened Copperhead CrossFit February 2nd, 2013.

  • CrossFit Level 2 Trainer

MitchMitch Medeiros, Coach

I am California born and raised but I’ve gown to love Phoenix since moving here in 2008. My “day job” is in the accounting field but my passion lies in CrossFit. My Wife and I live in Central Phoenix with our daughter and two dogs, Mikey the English bulldog and Murph the Pit/Boxer mix.

In my spare time, there’s a good chance that you’ll find me at the gym. I’m a gym rat and I love soaking up the atmosphere. Aside from lounging at the gym, there are a number of activities that always keep me busy. For starters, I enjoy Piña Coladas and getting caught in the rain. Joking aside, in my spare time I’m probably capturing or editing photos, watching a movie, reading or just hanging out with my family.

I first stumbled into CrossFit in 2006, while in college, during my days as a personal trainer. I slowly began working CrossFit methodologies into programs for myself and my clients. After witnessing the positive impact that it made, I quickly became a believer. While I do enjoy competing, coaching is what motivates me day in and day out. I love seeing our members hit a new personal record or nail a tough movement. I consider myself a much better coach than athlete and I am constantly striving to learn more. CrossFit gives me the chance to challenge myself as a coach and athlete and am grateful to be a part of this awesome community.

  • CrossFit Level 3 Trainer
  • Catalyst Athletics Level 1 Weightlifting Coach
  • USA Weightlifting Club Coach
  • Kong Fest 2014 competitor (5th place, Angry Chimp div.)
  • IFG Summer Strength Showdown competitor (3rd place, team div.)
  • East Valley Open III weightlifting meet (3rd place, 77kg)
  • Kong Fest 2013 competitor
  • Training blog
  • CrossFit Games Athlete Profile

craigCraig Rintoul, Coach

I am from sunny Southern California from a city by the name of Palmdale. I was born to Craig Rintoul Sr and Angela Rintoul, just before Labor Day weekend. I have two sisters, one older and one younger. Throughout my whole life I have always enjoyed being involved in sports. As a kid I had bad asthma and it kept me from doing a lot of activities. Despite that, I would play as hard as I could until I was in a full blown asthma attack. Once I got into high school I went out for Wrestling and Swimming to start my actual athletic career. I wrestled and swam all four years at the varsity level. After High school I still had the competitive itch so I started just working out until I found Judo, where I competed for three years until I moved to Arizona to go to school. Once in Arizona I found the sport of Olympic Weightlifting and I have been competing for the last five and half years. I have worked in the chiropractic and sports medicine field for the last nine years as an exercise therapist and chiropractic assistant. Currently I am a full time coach teaching people how to lift to their fullest potential.

In my free time I enjoy being social, listening to music, and drawing. Due to a school, work and athletic schedule most of my free time is spend doing homework or recovering from a workout.

Of all the sports that I have done Weightlifting is the most challenging. The weights always weigh the same and gravity is constantly fighting me. Everything is accounted for: how much you slept, how much you ate, and even what extracurricular activities have to take a back seat sometimes. All of that being said, it is also the most rewarding sport I’ve ever participated in. When you have worked so hard to reach your goal and you finally reached it, that is what this is all about and you forget all the sacrifices. It is kind of like life. Approach everyday like competition day and the competitions will be just like you practiced.

  • CrossFit Level 1 Trainer
  • Bachelor of Science Degree, Exercise Science
  • Chiropractic Assistant
  • USA Weightlifting Club Coach
  • Team Arizona Weightlifting Assistant Coach

dave tDave Tonn, Coach


I’m the local Phoenix boy living downtown and am the proud parent of two amazing kids, Crash and Roman. I spend my days coaching and developing a team of sales consultants in the industry of International Logistics

Growing up sport was certainly not my thing. I was always smaller, shorter, and skinnier than the athletic people; naturally I gravitated towards music performance. However, in my late 20’s I fell in love with running. I have completed 3 Marathons with a PR of 3:20:42, 3 Ultra-Ragnar Relays, and a couple dozen half marathons with a PR of 1:35:20.

During my time running, I’d heard of CrossFit and seen the games on ESPN. It looked difficult and something I had never seen before at the local gym. I just searched the web to find a CrossFit box in my area and started going. It was hard. In fact, my first day I couldn’t even lift the barbell above my head and at 29 years old, had never done a pull-up in my life. However, I had an absolute blast doing the workouts and just kept going back. Nothing with a barbell came naturally to me, and my first several workouts were with just a PVC Pipe. However, I really enjoyed trying and failing forward and I fell in love with the CrossFit community.

I am excited for our members to reach their individual fitness and nutrition goals. I look forward to working hard together in the gym so that we may greater enjoy our time outside of it.

  • CrossFit Level 2 Trainer
  • 3 Time Marathoner
  • 3 Time Ultra Ragnar (Team finished first place overall Ragnar Del Sol 2013)
  • Phoenix Throwdown Competitor
  • Sicfit Team Competitor
  • CrossFit Games Athlete Profile

Chelsea Lohman Bonfiglio, Coach


I am a native Arizonan and was raised in the White Mountains although I have spent most of my adult life in the Phoenix Metro Area.  I went to college at Arizona State University where I played rugby on the women’s club team.  I had always been an athlete growing up, but rugby quickly became my passion.  I played rugby at the collegiate and women’s club levels for 6 years but am now what I like to call, “semi-retired” and coach at ASU.  I live in Central Phoenix with my wife and our three (yes, I said three) dogs – Casey, Sol and Vader.  When I’m not coaching CrossFit or rugby, I am busy at work as an anatomy professor at A.T. Still University in Mesa.

In my remaining free time, my wife and I like to travel to the mountains to escape the desert.  We are particularly fond of the San Juan Mountains outside Durango, Colorado where we got married.  You can find us enjoying the scenery, hiking, snowboarding/skiing, and taking brewery tours in search of the finest craft beers.  While at home, I always enjoy any home improvement project or building something for my wife to craft.

As an athletic trainer, wellness and fitness have always been a key component of my professional and personal life.  I have always enjoyed spending time in the gym helping others or working out on my own.  I was admittedly apprehensive about CrossFit before I tried it, but after some convincing from my wife (then girlfriend), I gave it a try.  The community around Copperhead CrossFit and the knowledge of the coaching staff sealed the deal.  I drank the Kool-Aid and it was delicious.  I quickly fell in love with CrossFit and have never looked back.  I earned my level 1 certification in 2016 and have been coaching at Copperhead since.  Incorporating the principals of CrossFit into my own personal fitness methodologies and sharing my knowledge with our community has been extremely rewarding.  I do my best to include functional rehabilitation and safety in CrossFit’s constantly varied functional fitness to help our members achieve their individual goals.

  • CrossFit Level 1 Trainer
  • Certified Athletic Trainer
  • Certified Strength and Conditioning Specalist
  • Coach, Arizona State University Women’s Rugby Team

Art Trevino, Coach


I am an Arizona native and have lived in Phoenix my entire life. Ever since I can remember, I have been involved in athletics. Growing up, I played all sports from baseball to soccer and everything in between. I fell in love with baseball and played through my senior year in high school. Currently, I am a senior student at ASU Downtown finishing my degree in Exercise and Wellness.

Along with being a full time student, I spend my spare time with my wife, daughter, and two dogs.When I’m not at the gym, My wife and I love to walk our dogs around downtown, take them swimming, or marching them up one of the gorgeous hiking trails here in the valley. We love to be active and make it one of our biggest priorities in life.

When I was 8 years old, I began athletic training and never looked back. After a few years I started Resistance training and then when I was 13 I began to use a kettlebell followed shortly by a barbell. I first got into to CrossFit in 2011 while watching it on ESPN after a baseball game with some teammates. Although this is the first “CrossFit” gym I have been apart of, functional fitness is something I have been doing since I was 8-9 years old. I was never able to get into the Globo Gym model and the mainstay of isolated movements that are found there. The community and competition is what brought me to copperhead. Coaching and teaching is a love of mine and I am grateful to share it with all. CrossFit will forever be an integral part of my life.

  • CrossFit Level 1 Trainer


Tupac Enrique, Coach


I was born in San Diego, California in 1973 and lived there at various times of my childhood. During my youth, I also lived in other areas of California and Oregon, including living completely off the grid from age 5 until I was 9. The time I spent living without electricity, refrigeration, and conveniences such as indoor bathrooms actually holds some of my fondest memories and leads me to feel most at home when I’m outdoors. I grew up doing a lot of physical labor and once we moved back to the city, I played baseball and football. In high school I did football, wrestling and pole-vaulting.

Currently I continue to enjoy physical work as a Captain/Paramedic with Phoenix Fire Department and have over 20 years in the Fire Service. Within the Department I am on the Technical Rescue Team and on Arizona’s Task Force-1 which is a FEMA Urban Search and Rescue team. As of 2017 I have been married to Corina for over 17 years and we have 4 children (two are adults) and one grandson.

If I ever find any spare time, you can find me out hiking, mountain biking, rock climbing, watching my son’s North High football games and learning Jiu Jitsu right here at Gracie Arizona. My daughter is also learning Jiu Jitsu here and, as she likes to point out, has more promotions than me.

I was first introduced to CrossFit in 2010 and began by doing the “Filthy 50” with some heavily improvised home equipment in my brother’s driveway. (Our “kettlebell” was a 5-gallon water jug filled with 60 pounds of sand) Soon after, I joined a local CrossFit affiliate and in 2011 was able to travel to Denver, Colorado on a Regionals qualifying team. I was sold on CrossFit’s methodology soon after I began training in it because prior to that, I thought I was in my best possible condition. I soon realized that I had a lot that I could improve on and the camaraderie of everyone else pushing themselves right next to me drives me even more. Misery loves company.When Nathan and Mitch welcomed me into Copperhead’s family, it felt like a natural fit for me and I’m excited to work with all of you.

  • CrossFit Level 2 Trainer
  • USAW Level 1 Coach
  • Iron athlete Coach