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We custom design and install Live LED Wall with state-of-the-art visual experience with smooth and synchronized motion across multiple LED video wall controllers.

Dental Clinic

Dr. Marjorie Ramos, DDS

I have never worked with an IT specialist like Tony! Very efficient and reliable. He is very straight forward, you get what he says he'll be able to do for you. Good remote support. Can't ask for more! Two thumbs up for Tony... I will strongly recommend his superb service to all my colleagues!!! 

Dentist Appointment

Dr. Armen Mardirossian, DDS

I have been working with Tony of AT TECH SYSTEMS for last 12months and have found his services to be excellent. Very knowledgeable and dependable, always available to help out in timely manner. I would recommend him for your business IT needs

Dentist Chair

Dr. Jon Sayed, DDS

Tony Tejada of AT TECH SYSTEMS did the entire low voltage wiring, computer system and phone system for my office.  Tony is very reliable, fast and trust worthy.  He went the extra mile for me.  He never hesitated to do a task even if it was not a part of his contract.  I recommended Tony to my brother and some other colleagues of mine. I do recommend him to anyone who needs low voltage, audio + video.​

Mingling from Above


AT TECH SYSTEMS was founded on 2010 with over 100 customers from both Dental and Medical clinics. With our expertise honed over 20 years of combined experience in the A/V and IT field including technical support at Hewlett Packard, we at AT TECH SYSTEMS provide clients with efficient and cost-effective integrated network, security, and multimedia design solutions. We custom-fit technology systems according to the client's needs and budget, in which at the same time can be integrated into client's businesses and personal spaces. ​


Our vision is to design and integrate innovative systems that simplify complex needs that will make modern technology within reach to everyone. Our mission is to deliver a turnkey service by providing innovative network, security, multimedia design, and excellent customer service and support.​


We recommend top of the line products which will cater even to the most complex client requirements. We guide the client in every step of the deisgn phase recommending most reliable, most compatible, and most scalable systems which will enable the client to integrate personal preferences enhancing the system's main function.


2311 East Locust Court Ontario, CA 91761

M  626-641-9388 


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