We are customer centric and it is our privilege to serve you.



Cory Yates has spent 30 years in the restaurant industry, in one form or another. Historically an entrepreneur, Cory has built and sold five businesses over that time, only to start anew with an increased excitement and vigor.

Most note-worthy, previous business endeavors include Accurate Chemical, sold in 2004, now a thriving juggernaut serving the restaurant industry throughout the southwest and Remington Restaurant Equipment Repair, sold in 2012. Lucrative in that industry approach, the current business venture is Alpha & Omega Restaurant Equipment Repair founded in 2015. Yates and co-owner and Edgar Martinez, lead technician for Alpha & Omega, seek to fill the gap between the larger, but less responsive companies and the unlicensed, uninsured “fix-it-all” guy.

The theory for Cory is to be customer centric. “Bend when you need to and give back to those who trust you with their own livelihood. Build relationships based on that trust and typically, all the results take care of themselves”.

Steady growth and a solid reputation for an unparalleled customer experience, industry revered skills, teamwork and accurate communication are, and always will be, Alpha & Omega’s goals. While other companies strive to be the largest in Arizona, Alpha & Omega Restaurant Equipment Repair strives to remain the very best.



Edgar Martinez has been a consistent leader in the restaurant repair and HVAC industry for 24 years. Now the Senior lead technician with Alpha & Omega, he oversees a team of eight techs aiding with diagnostic issues, related repairs, equipment installations and adherence to established methods and procedures.

Working beside Co-Owner Cory Yates since 2008, Edgar realized his hands-on passion of the business and helped turn his vision of Alpha & Omega Restaurant Equipment and Repair into a reality. Well-known throughout the Valley by numerous chefs and commercial clients, Edgar is a very valuable part of the equation interfacing with our clients on a day-to-day basis.

Balancing company ownership, along with his profound industry knowledge and daily on-site challenges, Edgar’s most prized priority is his family. A life-long resident of Arizona, he is married with three children, four stepchildren and five dogs.


Sales Marketing Executive

Steve Davies has over 30 years of experience in the restaurant industry. From his humble beginnings as a Chef, Steve is not only knowledgeable about restaurant equipment, he has practical experience and working knowledge of virtually every piece of equipment in your kitchen. Steve has taken his experience from the kitchen, to foodservice distribution, and now equipment repair, providing a wealth of knowledge in the restaurant industry. His consultative approach to customer service, sales, and marketing, has made him a valuable resource for our customers, and our team.

“There is only one-way to earn loyalty, which is to provide value. The best part of providing value… is that friendship is the inevitable by-product” – Steve Davies


Service Technician

Adam Martinez was the first tech hired with Alpha & Omega Restaurant Equipment Repair in 2016. Adam is a natural in the repair industry – growing up hands-on beside two uncles that are in the business; one of them being Edgar Martinez, the co-owner of Alpha & Omega. Working previously with Cory at Remington Restaurant Equipment Repair as an entry-level PM (preventative maintenance) technician, Adam took to the work expertly and, through his own motivation and hard work, has since added to his immense skill set.

Born and raised in Phoenix, Adam graduated from AAI Trade School, married the love of his life 4 years ago and purchased his first home at the age of 24.


Service Technician

Joining the A & O team in April 2019, Tom Stefanszky brings vital industry experience through his certifications in Pitco, Eloma, Angelo Poe, Henny Penny, Concordia Coffee and Electrolux.

Tom has been in the restaurant equipment repair business for four years and has quickly become a respected technician for Alpha & Omega Restaurant Equipment Repair.

An Arizona resident for 14 years, Tom currently resides in the West Valley with his wonderful wife and two beautiful children.


Planned Maintenance Technician 1 / Apprentice Technician

Growing up with his father’s “do it yourself” mentality and watching Edgar Martinez Sr. grow the company of Alpha & Omega through his passion led Junior to join the team. 

He understands the industry and his importance to our clients through our planned maintenance programs. Born and raised in Phoenix, he has in-depth knowledge of Valley locations and the accounts we service.

“Alpha & Omega is not only the place I work, but also my second family. We are here everyday to serve our clients and do it with pride.”


Planned Maintenance Technician 2 / Apprentice Technician

Oscar Martinez was welcomed to our A & O team in June 2019 and we are thrilled to have him aboard. An honor roll student, Oscar has a business education background, attending college for accounting and most recently adding the EPA 608 universal certification to his portfolio. He has transitioned to Alpha & Omega Restaurant Equipment Repair from his previous employer, Amazon – always in the top 10% of employees receiving lots of positive feedback for productivity and quality.

With a family background in mechanical experience, Oscar’s preference is a future in the repair industry. Born and raised in Phoenix, he comes from a hard-working family of five, including his parents, a brother and a sister.


Planned Maintenance Technician

Joining Alpha & Omega in September of 2020, Elijah Charles plays a key role as a technician with our Planned Maintenance team. Being the youngest of five siblings, Elijah’s older brothers have always inspired him to work hard and succeed. In his words, ” I love to work and learn new skills and with this team, I will definitely get the knowledge I need to succeed”.

We appreciate his passion to learn the industry and his excellent communication skills with our clients and his peers to get the job done successfully. Originally from San Francisco, Elijah has been a resident of Arizona for ten years with previous employment history in construction. 


Administrative Assistant

Joining Alpha & Omega as our administrative assistant in September of 2019, Michelle Sileski brings over 25 years’ experience in the accounting field. Michelle analyzes, reviews and keeps our internal bookkeeping immaculate, while playing a lead role in the steady growth of our company. She also engages with new client accounts, account collections and works with our entire team from the dispatchers to the techs to the owners on a daily basis.

Hailing from the cool beaches of California, Michelle just recently moved to the Arizona desert and loves it here in Phoenix.

Angela Jimenez

Lead Dispatch

Bringing 12 years of valuable dispatching experience to the team, Angela Jimenez joined Alpha & Omega in November 2020. She expresses and exhibits a strong motivation to learn all aspects of our company and the industry. From dispatching, to job quotes, to time-managed tech scheduling, and acquainting herself with our 400 clients throughout the valley, Angela excels at conquering her goals.

Angela was born and raised in Phoenix, where she married her grade school sweetheart at the age of 18 and together, they have raised 6 beautiful children. Angela’s goals are to be the best at whatever level she is working at within the company. Her favorite quote is “never give up on what you set your mind to and reach for the stars because with God all things are possible.”



Service Hours

Monday – Friday
6:00 am – 4:00 pm
24/7/365 Emergency Service Available