Your domain registration is pending. Check back in an hour


3 years ago
Core1 is by far the best security services in the Bay Area. Corwin Chan is very professional and immensely knowledgable and equipped to provide for all of your security needs. Free consultation - 24/7 hour around the clock protection, what more could you ask for. Thank you for the wonderful service!
- Joanne A
2 years ago
Super! I highly recommend Corwin and his crew. We needed protection from vandals entering and damaging our SF property until we were able to erect secure fencing. Here's what they did for us: 1) Corwin kindly and happily (he's a happy guy) informed us about their business history, legally required permit, security patrol cars and guards. 2) They responded to our need the VERY DAY of the emergency. 3) Provided 7 nights of 12 hour - onsite security from 7pm-7am, with a flood light illuminating the area where the vandals had access. (They even went above and beyond this, with a very clear presence to any potential vandals.) 4) Provided us with pictures at the start and end of each shift, giving us the confidence that the vandals had not gained access. 5) Corwin communicated with us every single day, plus responded promptly to our questions. Yes... we recommend them to anyone needing personal and professional security service. Office Mgr, Terri
- Terri H
2 years ago
I work in nightlife in the Bay Area and have encountered some extremely interesting individuals. Some to an extent that needed to be taken care of. The times that Core1 Security was in charge of the events I was working at felt safe and protected. I highly recommend their services day in and day out
- John D



To Protect with Courage, To Serve with Compassion. Core1 Security Services provides Private Security Services, here is a sample of services C1SS provides: Uniformed Armed and Unarmed Security Guard Services, Plain clothes Executive protection, Special event security Loss Prevention Detail, CCTV monitoring. Here at C1SS we pride ourselves to be able to provide exceptional customer service to its clients and guests. Please don't hesitate about protecting yourselves and your assets. Contact us today for a consultation. We are looking forward to speaking with you about the services we can provide.


Established in 2013. Core1 Security Services' corporate headquarters is located within the San Francisco Bay Area. We are innovative and aggressive in our attempts to uphold the goals we have defined, always seeking further knowledge, and always challenged. Our major goal is professionalism; our greatest strength is that we are fundamentally dedicated to assuring the highest level of customer service to our clients. Core1 Security Services philosophy is simple- Professionalism in every area. This philosophy is in every aspect of the company. The company's size, our experienced management, and our commitment to total customer satisfaction give Core1 Security Services an excellent position in the market.

Contact Us


Call now
  • (628) 200-6002


Get directions
2 Embarcadero Center Flr 8
San Francisco, CA 94111

Business Hours

Mon:Open 24 hours
Tue:Open 24 hours
Wed:Open 24 hours
Thu:Open 24 hours
Fri:Open 24 hours
Sat:Open 24 hours
Sun:Open 24 hours
Get quote
Message sent. We'll get back to you soon.