Si1isec – the Silicon Valley Information Security gathering

Si1isec logo

What & Why:

Si1isec is one of the many CitySec gatherings around the world, One of the many unaffiliated collection of informal meetups for like-minded information security professionals. These gatherings are for meeting up and discussing topics of interest in a non-work, non-vendor setting; preferably while enjoying food and beverages (sometimes adult beverages).


Fellow information security professionals and hackers


Si1isec typically gathers on the first Thursday of the month, starting around 7 PM (though some show up earlier, and some later). Note that due to other large gatherings in other cities during the first week of a month (e.g, 'hacker summer camp' (DEFCON/Black Hat) or RSA Conference) most of us will not be in attendance.

2019 Schedule:

July 18 (Moved from the usual 1st Thursday which is Independence Day)
August 1
September 5
October 3
November 7
December 5

Previous dates:


January 5
February 2
March 2
April 6
May 4
June 1
July 6
August 3
September 7
October 5
November 2
December 7


January 4
February 1
March 1
April 5
May 3
June 7
July 5
August 2
September 6
October 4
November 1
December 6


January 3
February 7
March 7
April 4
May 2
June 6


The next Si1isec will be held at:

Metro City Restaurant & Bar
151 S Murphy Ave
Sunnyvale, CA 94086

Currently we meet at Metro City Restaurant & Bar; at the tables on the sidewalk in front of the venue on Murphy street. Look for the folks with the blinking badges and other electronics.
Note that if the venue is unable to accommodate us (which happens due to sports ball games or wait staff shortages), we will move to other venues on Murphy Street (such as Hardy's Bavaria).
At some point we may head to other venues on Murphy street for other food/libations. Follow the mailing list and @si1isec Twitter account for details.


There is street parking on Murphy, and multiple parking lots nearby. Note the Caltrain parking garage located at the north end of Murphy Street is free after 6 PM and most likely your easiest parking option.

Getting there:

Caltrain: Sunnyvale station, with many of the limited and baby bullets stoping at the Sunnyvale station
Driving: easy access from both Central Expressway and 101 for their respective Mathilda exits, head towards Sunnyvale Town Center and the Sunnyvale heritage district, with the venue on the east end of Murphy Street.
Directions via Mapquest
Directions via Google Maps

Other local CitySec gatherings:

BaySec may no longer have the mailing list, but they now have a new web site
You can also check out the #BaySec hashtag on Twitter

BaySec happens on the third (3rd) Tuesday of the month at 7 PM at:
Patriot House
2 Embarcadero Ctr, Level P
San Francisco, CA 94111

  • HoodSec - @hoodsec and
  • HoodSec occurs the last Thursday of every month at
    Radio Bar
    435 13th St, Oakland, CA 94612

  • Other information security/hacker events and organizations in Silicon Valley that many Si1isec attendees also attend:

    Electronics Flea Market (EFM) at De Anza College, Cupertino

    ISC2 Silicon Valley Chapter

    ISSA Silicon Valley

    ISACA Silicon Valley chapter

    Social media:



    si1isec at si1isec dot org

    Mailing list:

    We have an announce list on if you care to get those notifications.