Simply put, Spa Development International is a one-stop provider of all things spa and salon—including furniture, fixtures, equipment and operating supplies, as well as design, development, and consulting.

From our headquarters in Scottsdale, Arizona, we’ve built a worldwide network of manufacturers and providers, ensuring that we can give our clients the highest level of quality and support, at the most cost-effective price.

We believe in the added value we provide, from personalized customer service and troubleshooting, to the continuous communication we provide before, during, and after your project. We offer an organized ordering and delivery system—creating customized schedules to ensure proper order placement and delivery of your equipment. We are a client advocate, here to guide you every step of the way and answer any questions you may have. Ultimately, our main focus is to support you, and keep your guests coming back!



Twila Kelly – Founder and Owner

Twila Kelly is a 23 year resident of Scottsdale, Arizona where she currently manages all aspects of Spa Development International.

Twila brings over 20 years of executive spa experience to her clients and is recognized in the hospitality industry for her knowledge with spa and salon equipment as well as business development. In addition, she has an impressive educational background which includes a Bachelor’s degree in Communication, a Master’s degree in Training & Development, and a Post Baccalaureate degree in Education.

Her expertise in consulting on major spa and salon equipment purchases, project management, spa and salon operations and budgeting ensures she makes the best recommendations for her clients. Because of this extensive experience with salon and spa equipment, Twila has worked with many of the leading Hotels, Resorts, and Destination Spas in the industry with the development or remodel of spas and salons. Many of Twila's projects have been featured in Day Spa Magazine, Spa Magazine, American Spa Magazine, and Spa Management Magazine.

While consulting with clients on spa and salon equipment purchases and managing the projects, clients will soon feel Twila’s passion for the industry, which is contagious, allowing her clients to enjoy the development process! Twila also shares industry insight, information on equipment and her own personal posts on twitter @TwilaCaldwell.

Twila is recognized for her strengths outside the hospitality industry as well. She is graduate from N.C. State University where she was a scholarship competitive Swimmer for the Wolfpack. Twila is an Ironman Triathlon finisher. Her passion is youth sports and fitness and helping kids build the self-esteem needed to be a successful student athlete. Twila also volunteers her time teaching at Arizona State University’s Spa Management Program. She shares her beautiful life with her husband and their two children.

Twila's goal with the spa and salon industry has always been “to put the right products in front of the right people, and the right people in front of the right people.”


Price Match Promise

We want the opportunity to "win" your business and work with you on your order. If you find better pricing on the items we've quoted you please come back to us and let us know as we would like to match any competitor's price for the same item.