Service you can trust.

Since Sebastian emerged into the construction market, we have been a leader in electrical, low voltage, and underground contracting. We also act as a telecommunications, MSP, and low voltage security provider. Navigate below to learn more about our integrated services.

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We've been around for over 75 years and continue to grow. Get to know who we are, how our business has grown, and what we can do for you.

Providing quality telephone service to our community since 1946.

Sebastian has been dedicated to proving the best local and long-distance phone service, high-speed internet, and monitored security systems to our customers for 75 years. Our competitive pricing and breadth of service sets us apart from all other providers in the valley. 

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Sebastian has been building communications networks since 1946. We design solutions for your communications needs at the best possible price. View our communications services for pricing details.

We also partake in California's Lifeline Program that provides discounted basic residential telephone service to low-income Californians.

When you need a high-speed connection to the world around you, Sebastian has you covered with internet speeds up to 200 Mbps. Our advanced Lightwave fiber optic network is superior cable, and it connects right to your doorstep. Whether you’re a casual user or a demanding downloader, you’ll have super-fast access for streaming video, web browsing, and all your internet needs.

Sebastian’s local, state-of-the-art monitoring center can respond to your alarm within seconds, to help keep your family and property safe and protected. Whatever your needs and whatever your budget, we can design and install a security system that’s right for you.

Secured by Sebastian.

We provide you commercial and residential options to keep you connected and secured. Our in-house IT team provides helpdesk support 24/7 for all your Sebastian managed services. We can design and customize all audio/video, communications, security, and IT solutions for your business. 

Protect your business with our advanced security products.

Utilize our CCTV, fire/burglar alarms, access control, and a variety of other systems to ensure the safety of your employees and building.

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We handle the technology so you don't have to.

We are a managed service provider, meaning we can provide in-house IT support for your business amongst other IT products and services.

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Custom built A/V solutions for your needs.

Our video conferencing, board room systems, and integrated control systems are all custom designed to fit your needs.

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Stay in touch with those who matter most.

Our phone systems, high speed internet, service plans, and other communications services are designed to keep your home and business connected.

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IT services designed for our customers.

Managed services enable Sebastian to proactively monitor devices and the IT network. Sebastian can identify and fix issues before they become disruptive. Sebastian handles all updates to keep you safe and in compliance with best practices (e.g. automated software updates). 

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  • Strategic Consulting

  • 24/7 Helpdesk

  • Managed IT Services

  • Performance Monitoring

  • Risk Assessment

  • IT Best Practices

Qualified construction experts.

Our construction teams are organized for maximum efficiency from the top down. Sebastian eliminates the need for multiple subcontractors and provides a wide range of integrated services, so we can handle the entire job — and get it done right. 

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LIGHTING/POWER

TRAFFIC SIGNALIZATION

24/7 ELECTRICAL SERVICE

COMMERCIAL + INDUSTRIAL

UNDERGROUND BORING

DESIGN-BUILD

STRUCTURED CABLING

SERVICE AGREEMENTS

Meet our satisfied clients.

We pride ourselves on the quality of our work and our clients can attest to it.
View some of the testimonies from our valued clients below.

Filomena Fagundes

Project Manager, CSU Fresno
We are extremely appreciative and impressed not only with the work Sebastian has completed at Fresno State so far this year, but also the flexibility and commitment. We continually hear great things about Sebastian and are very excited to work with us on a new campus wide Access Point project.

Nathan Metheny

Owner, Valley Wide Pest Control
Karlene was a pleasure to work with and kept me updated during the entire process until the job was complete. I've worked with others in this industry and none compare to her experience or her professionalism!!

Josh Lipschitz

System Administrator, OK Produce
Sebastian did a great job and I would use them again to run or fix fiber optic cables. Their team was very professional and did very clean work.

Tony Boren

Executive Director, Fresno Council of Governments
Sebastian is a well-recognized and highly recommended local company and a leader in the technology industry. Sebastian employees were all very gracious, friendly and technically competent. They were very quick to address our concerns.

Bryan Hahn

Mechanic IA, Baltimore Air Coil
Sebastian is one of the best companies I have worked with from a customer standpoint.

Christine Miktarian

Vice Chancellor of Operations, State Center Community College District
Sebastian was able to determine the issues and make recommendations for solving those problems. We would most definitely recommend Sebastian to other colleges or businesses because of their well-rounded yet technical knowledge base, outstanding customer service, and continuing evolution of technology awareness.

John Ostlund

Owner, K-Jewel 99.3
We all need a company that is dependable, and that is what I love about Sebastian. They don’t just support the networks – they support the people who use the networks.

Pedro Nunez

Associate Engineer/Public Works Inspector, City of Delano
I would definitely use Sebastian again. We have them looking at two other potential jobs.

Leo Rodriguez

Project Engineer, Pickett and Sons
Great communication team, competitive pricing and willing to go above and beyond a client's expectations.

Annette Leon

Property Manager Supervisor, Kings View Apartments
I like the technician that was sent out to our property. He answered all my questions and explained everything well. We have been referring Sebastian to friends.

Cheryl Beal

Property Manager, James Hendricks and Associates
My community camera system was down, Sebastian came right out and got it up and running! Their customer service is amazing.

Aaron Salisbury

IT Technician, Chukchansi Resort & Casino
Thank you Sebastian for all your work and communication. I am very impressed that our install is essentially being completed on the 3 week schedule that was originally laid out.

Kai Han

Senior Regional Planner, Fresno Council of Governments
Sebastian Technicians are very professional and responsive. They get the installation done quickly and address technical issues to our satisfaction.