Our Team

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Doug Miller


Doug Miller has been a small business owner for more than 20 years. Prior to being self-employed, he held a senior sales position with National Cash Register (NCR), a regional sales position with Dataserve, Inc., and then ended as a senior account manager with Mid-Mountain Data Systems. In 1995, Doug purchased a coupon tabloid franchise, a direct mail advertising company out of Portland, Oregon.

After growing to three territories, he sold the business and opened a mortgage brokerage firm, Customers First Choice Mortgage, in Boise, Idaho. As Doug’s entrepreneurial spirit grew, he partnered with Seth Brink in April 2015 to purchase The Gyro Shack. Their intentions are to become a “Franchisee Focused” franchisor.


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Seth Brink

V.P. | Operations and Development

Seth Brink is a franchise executive with more than 18 years experience in multiple roles. Beginning in 1994, Seth entered the food world as an hourly employee with Papa Aldo’s Pizza where he worked for two years. He then went into the U.S. Air Force for four years before returning to a management position at Papa Murphy’s in 2000.

From 2004-2013, Seth excelled in two separate DMA oversight positions in the Cedar Rapids, Iowa, and Nashville, Tennessee Papa Murphy’s markets. Seth partnered to buy The Gyro Shack with Douglas Miller in 2015 and now holds the role of vice president.


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Gina Casteel

Lead Trainer

Gina Casteel has been in the restaurant business for many years, during which she has excelled in customer service and her passion for training has grown. Her first management job was in Nashville, Tennessee, with a full-service restaurant called Mozzarella’s. After many years there, she moved back to California where she worked as an assistant general manager and corporate trainer for Panera Bread.

In 2004, Gina and her family moved to Maui, Hawaii, where she became the general manager for Jack in the Box. In 2007, she began Aloha Sparkle Cleaning Services, and in eight years she grew her company from one property to 75 properties.


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Victor Reyes-Zavala

Lead Trainer | Store Operations

Victor Reyes-Zavala has been in the restaurant business for more than nine years, beginning in 2007 when he began working as a cook for Chili’s Restaurants. During this time he has been dedicated to his passion for food and quality in the kitchen. In 2009, he became a lead cook and trainer to guide new kitchen staff in the concept’s brand goals for food quality.

In 2012, Victor joined the founder of the Gyro Shack as the lead cook in order to continue his passion for food. After Doug and Seth purchased the Gyro Shacks in 2015, they could see the skills Victor brought to the table and advanced him to lead trainer – store operations.



We pride ourselves on providing both authentic and unique takes on the traditional, Greek gyro. We choose only the freshest of ingredients for our customers, delivered at their pace.


"Fresh sauce, fresh salads, and fresh, made to order, gyros. Everything was to be made by hand. We built the shacks for the love of food and health... the Greek way."

- Gus Zaharioudakis, Founder.