Management Team

Derek Agnew

General Manager
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Phone: (208) 725.0595 x118

As the General Manager for Thunder Spring LLC, and both Zenergy locations in Sun Valley and Boise, Derek's responsibilities include overseeing all operations at both clubs, and multiple aspects of the Thunder Spring Lifestyle Condominiums and vacation rentals in Sun Valley. Derek offers a wealth of experience in both health club and hotel management. He was the General Manager of Genesis Health Club in Beverly Hills, CA, a boutique club with special emphasis on personal training. He also worked in management at the Peninsula Hotel, a Five Star and Five Diamond hotel also in Beverly Hills.
Derek is an avid sports enthusiast. His personal athletic achievements include an NCAA Football National Championship for the Colorado Buffaloes in 1990; he is also an avid skier, golfer and mountain biker.

Kelly J. Arial, CPA

Assistant Manager / Controller
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Phone: (208) 725-0595 x113

After spending one summer in the valley, Kelly made the leap to relocate to Ketchum in 2005. She hasn't looked back since. Kelly holds a Master's Degree in Finance and recently became a Certified Public Accountant in the summer of 2010. In her free time she enjoys skiing, trail running, golfing, mountain biking, and hiking.

Beryl Barnes

Director of Sales & Membership Services
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Phone: (208) 725-0595 x114

Originally from Texas, Beryl attended college in California and Florida prior to settling here in the valley close to 20 years ago. Her extensive background includes customer service, hotel hospitality, retail, restaurant management, and the travel industry. Beryl has been at Zenergy since its inception, and has worn several hats during her tenure here. She loves her role of welcoming new members to the club and assisting current members in any way possible. When not enjoying the outdoors, Beryl volunteers regularly for both the Sun Valley Adaptive Sports program and the local Cancer Society chapter. She enjoys surfing, waterskiing, hiking, skiing, yoga, and squash and anything else that keeps her moving.

Mollie Holt

Spa Director
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Phone: (208) 725-0595 x124

Mollie was born and raised in Ketchum and returned to the valley in 2003 after receiving a degree from Bates College in Studio Art. She started working at Zenergy in 2008 with the intention of enjoying “one last year” as a ski bum before heading back to school and never left. She has been the Spa Director since 2009. In her free time she enjoys training for triathlons, cooking, and working in her garden.

Tim Hanna

Health & Wellness Manager
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Phone: 208.725.0595 x106

As Zenergy’s Health and Wellness Manager, Tim oversees all clinics and special events and is here to assist you in scheduling your health and wellness appointments. He is also available to discuss your fitness goals and recommend the perfect Zenergy trainer or program to help you reach them.

Tim is an NASM-certified personal trainer who is passionate about providing unique, total-body workouts. His further certifications with Les Mills CX Worx and TRX suspension training guarantee to keep you on your toes. Tim draws from experience competing in triathlon, ultra marathon, soccer, skiing, pole vaulting and more to develop well-balanced circuit training programs for the beginning gym-goers all the way to professional athletes. If you are feeling adventurous, try mixing one of his caveman workouts in with some of your favorite trail runs or meet in the park to experience a “playground challenge.” These programs are revitalizing, addictive, and produce results.

Yvette Hubbard

Health & Wellness Coordinator
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Phone: (208) 725.0595 x111

Yvette has been in the fitness industry for over 25 years as both a personal trainer and instructor. Her high energy and spunky attitude as a Boise State University cheerleader allowed her to transition easily into high-impact aerobics and hip-hop dance instruction. Currently she is the Health & Wellness Coordinator for Zenergy, teaches everything from Bikini Boot Camp to gentle yoga, and in her spare time accepts private training clients. Yvette’s hobbies include hiking, running, and camping with her best friend and husband of 15 years and her two crazy yellow labs.

Anna Geist

Food & Beverage Manager
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Phone: (208) 725-0595 x141

After a career in five-star hotels Anna decided to bring her high energy, and interpersonal skills to the fitness industry. As a group fitness instructor and personal trainer she is able to fuse a sense of hospitality with her workouts to achieve a highly motivating and memorable experience. When Anna's not bouncing off the walls at the gym, she enjoys time with her family skiing, hiking, biking and paddle boarding.

Julie Siegel

Human Resources Manager
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Phone: (208) 725-0595 x112

Julie is Certified Public Accountant who has lived in the valley for 19 years. A spin instructor at Zenergy for the last 5 years, Julie has recently expanded her role at the club to include Human Resources and Payroll Manger. She brings with her over 20 years of experience in various accounting and management positions in the financial services industry. In addition to her interest in fitness, Julie is also certified as both a Precision Nutrition Coach and an Eating Psychology Coach and will be helping to expand the nutrition offerings that Zenergy has for its members. When not crunching numbers or researching protein powder, Julie enjoys spinning (of course), trail running and Nordic skiing.

Liz Kantor

Marketing Manager
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Phone: (208) 725-0595 x104

Liz brings over 9 years of Marketing, Sales and Public Relations experience to the Marketing position at Zenergy. She received a BA in Communication from the University of Colorado. Her position focuses on marketing the club externally to help bring in new prospects to the club and driving all channels of revenue, as well as creating targeted marketing programs for club members. When she's not organizing and planning, Liz enjoys hiking, running and spending time with friends and family.

Joel Bernbaum

Creative Director
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Phone: (208) 725-0595 x170

As the Creative Director, for Zenergy, Joel Is responsible for the creative vision, the look, the feel, and the tone of the Zenergy brand. Working closely with the executive team, in-house marketing and outside creative agencies to ensure company values, brand promise and standards are adhered to. Joel is a meticulous creative professional with a skill set that is uniquely suited to building brands and companies by producing dynamic, marketing and communications collateral. Most recently, serving as the Global Eyewear Category Manager at Smith Optics. Prior to his tenure at Smith Optics, Joel served as the Creative Director for SCOTT SPORTS.

Zenergy Health Club & Spa BBB Business Review

Operated By VP Companies
245 Raven Road Ketchum, ID  .  208.725.0595  .  .(JavaScript must be enabled to view this email address)  .  © 2015 Zenergy-Thunder Spring


Street Address: 245 Raven Road, Ketchum, ID 83340
Mailing Address: P.O. Box 1363, Ketchum, ID 83340

Phone: (208) 725-0595 
Toll-free: (888) 725-0595 
Fax:  (208) 725-0594



Taking a road trip to Boise?  Enjoy a stay with our Boise Lodging Partner Hotel 43
Zenergy Members receive a 20% discount. CLICK HERE to learn more.


Club Hours:

Monday-Friday, 6:00am-8:30pm
Saturday, 7:00am-7:30pm
Sunday, 8:00am-7:30pm

Spring Outdoor Pool Hours:
Weekdays, 7:15am-8:15pm
Saturday, 7:15am-7:15pm / Sunday, 8:00am-7:15pm



Located just north of Ketchum off Saddle Road. From Main Street Ketchum, continue North approximately a half a mile. Turn right on Saddle Road, then left on Valleywood Drive. Look for the Zenergy sign at the entrance of Valleywood Drive.