Irvine Underground
Fri, Oct 9, 2026 · 7:00 p.m.
Blue Hummingbird Coffee and Kitchen, 1 Park Plaza, Suite 165, Irvine (subject to change) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
California
Santa Ana, CA cybersecurity events & groups
No security group was found that meets inside Santa Ana itself; the regular meetings are spread across Orange County. Irvine Underground meets on the second Friday, DC714 on the second Wednesday in Garden Grove, OC2600 on the first Friday in Fullerton, and the Cloud Security Alliance, ISACA, OWASP and ISSA chapters meet at rotating venues. Larger events nearby include the ISACA and IIA Orange County GRC conference in Fountain Valley on October 15, 2026 and GPSEC SoCal in Irvine on March 25, 2027.
Start here
- DC714 (DEF CON Group Orange County): Free, beginner-friendly DEF CON group on the second Wednesday of most months at Coastline College in Garden Grove.
- Irvine Underground: Free, open hacker night on the second Friday of each month, with meeting notes going back to 2002.
- Cloud Security Alliance (CSA) Orange County: Free evening meetings with talks and hands-on workshops, next on October 28, 2026 (RSVP required).
Six months at a glance
Datebook
October 2026
Beyond Boundaries: Future of GRC (ISACA OC and IIA OC)
Thu, Oct 15, 2026 · 7:00 a.m. to 6:00 p.m.
Mile Square Golf Course, Fountain Valley · Metro area
Joint ISACA and IIA Orange County chapter conference on governance, risk and cybersecurity; 8 CPE. Registration is through Cvent.
ConfirmedConferencePaid
SoCalSec October 2026
Mon, Oct 19, 2026 · 6:00 p.m. to 8:00 p.m.
Venue to be announced (the September 2026 edition was in Anaheim) · Metro area
Social for cybercrime, DFIR, security, legal and public-safety professionals, presented by SoCalSec with the HTCIA chapter. Registration on Luma is free; the venue is to be announced.
ConfirmedMeetupFree
HTCIA Southern California October 2026 Chapter Meeting: From Public Service to Corporate Security and the Road to CPP
Wed, Oct 21, 2026 · 3:00 p.m. to 6:00 p.m.
Karl Strauss Brewing Company, Costa Mesa · Metro area
Listed on the chapter Luma calendar. The registration page (Constant Contact) returned HTTP 403, so who may attend and any price were not read; members-only follows the chapter default.
ConfirmedChapter meetingMembers only
CSA Orange County monthly meeting with Arcon: The New Identity Problem: Trusting AI Agents at Scale
Wed, Oct 28, 2026 · 5:30 p.m. to 7:30 p.m.
5271 California Ave, Irvine · Metro area
Described by the organizer as the last monthly meeting of 2026. RSVP is required, walk-ins are not allowed, and the sponsor Arcon presents.
ConfirmedChapter meetingFree
November 2026
FutureCon San Diego Cybersecurity Conference 2026
Thu, Nov 5, 2026
San Diego Marriott Mission Valley, San Diego · Regional
One-day hybrid conference run by an events company, with vendor sessions. Pricing is not shown on the event page.
ConfirmedConferencePaidVendor-hosted
OC2600
Fri, Nov 6, 2026 · 7:00 p.m.
23b Hackerspace, 418 E. Commonwealth Ave, Unit 1, Fullerton · Metro area
Per published schedule; confirm with organizer.
MeetingFree
ChannelPro DEFEND: Anaheim 2026
Mon, Nov 9 to Tue, Nov 10, 2026
Hotel Fera Anaheim, Anaheim · Metro area
Security event for MSPs, MSSPs and IT channel partners; free for qualified channel partners only.
ConfirmedConferenceFreeVetting requiredVendor-hosted
Southern California Public Sector Cybersecurity Summit 2026
Thu, Nov 12, 2026
Hilton Long Beach, Long Beach · Regional
Run by Government Technology (e.Republic), an events and media company. Open to the public sector only; registration is free.
ConfirmedSummitFreeVendor-hosted
Irvine Underground
Fri, Nov 13, 2026 · 7:00 p.m.
Blue Hummingbird Coffee and Kitchen, 1 Park Plaza, Suite 165, Irvine (subject to change) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
San Diego CyberCon 2026
Fri, Nov 13, 2026 · 8:00 a.m. to 6:00 p.m.
Marriott Marquis San Diego Marina, San Diego · Regional
First edition of a community conference organized with San Diego security chapters; up to 9 CPE. Ticket requests need approval and the price is not shown on the organizer pages.
ConfirmedConferencePaidVetting required
December 2026
OC2600
Fri, Dec 4, 2026 · 7:00 p.m.
23b Hackerspace, 418 E. Commonwealth Ave, Unit 1, Fullerton · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Irvine Underground
Fri, Dec 11, 2026 · 7:00 p.m.
Blue Hummingbird Coffee and Kitchen, 1 Park Plaza, Suite 165, Irvine (subject to change) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
January 2027
OC2600
Fri, Jan 1, 2027 · 7:00 p.m.
23b Hackerspace, 418 E. Commonwealth Ave, Unit 1, Fullerton · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Irvine Underground
Fri, Jan 8, 2027 · 7:00 p.m.
Blue Hummingbird Coffee and Kitchen, 1 Park Plaza, Suite 165, Irvine (subject to change) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
February 2027
OC2600
Fri, Feb 5, 2027 · 7:00 p.m.
23b Hackerspace, 418 E. Commonwealth Ave, Unit 1, Fullerton · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Irvine Underground
Fri, Feb 12, 2027 · 7:00 p.m.
Blue Hummingbird Coffee and Kitchen, 1 Park Plaza, Suite 165, Irvine (subject to change) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
The Official Cybersecurity Summit: San Diego 2027
Thu, Feb 18, 2027 · 8:00 a.m. to 6:00 p.m.
Marriott Marquis San Diego Marina, 333 West Harbor Drive, San Diego · Regional
Ninth San Diego edition, run by CyberRisk Alliance, a media and events company. Standard admission $300; registrations are reviewed and limited to working cybersecurity, IT and information security practitioners.
ConfirmedSummitPaidVetting requiredVendor-hosted
March 2027
Planet Cyber Sec AI Conference, Orange County
Wed, Mar 3, 2027
Orange County (venue not posted) · Metro area
The organizer schedule lists Planet Cyber Sec AI Conference, Orange County, CA on March 3, 2027, without a venue or time. Run by Layer 8 Masters; the 2026 edition was at the Hilton Orange County, Costa Mesa. Pricing is not shown.
ConfirmedConferencePaidVendor-hosted
OC2600
Fri, Mar 5, 2027 · 7:00 p.m.
23b Hackerspace, 418 E. Commonwealth Ave, Unit 1, Fullerton · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Irvine Underground
Fri, Mar 12, 2027 · 7:00 p.m.
Blue Hummingbird Coffee and Kitchen, 1 Park Plaza, Suite 165, Irvine (subject to change) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
GPSEC SoCal 2027
Thu, Mar 25, 2027 · 8:00 a.m. to 5:00 p.m.
Irvine · Metro area
One-day conference run by GuidePoint Security with vendor sessions. Attendance is by request and reviewed by the organizer. The registration page gives the venue as "[AV] Irvine"; the 2026 edition was in Irvine on April 2, 2026.
ConfirmedConferenceVetting requiredVendor-hosted
FutureCon Los Angeles Cybersecurity Conference 2027
Wed, Mar 31, 2027
Hilton Los Angeles Culver City, Culver City · Regional
One-day hybrid conference run by an events company. Pricing is not shown on the event page.
ConfirmedConferencePaidVendor-hosted
April 2027
OC2600
Fri, Apr 2, 2027 · 7:00 p.m.
23b Hackerspace, 418 E. Commonwealth Ave, Unit 1, Fullerton · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Irvine Underground
Fri, Apr 9, 2027 · 7:00 p.m.
Blue Hummingbird Coffee and Kitchen, 1 Park Plaza, Suite 165, Irvine (subject to change) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
May 2027
SANS Security West 2027
Mon, May 10 to Sat, May 15, 2027
Hilton San Diego Bayfront, San Diego · Regional
Commercial training run by the SANS Institute; in person and virtual.
ConfirmedTrainingPaidVendor-hosted
July 2027
FutureCon Orange County Cybersecurity Conference 2027
Wed, Jul 28, 2027
Embassy Suites by Hilton Anaheim-South, Garden Grove · Metro area
One-day hybrid conference run by an events company. Pricing is not shown on the event page.
ConfirmedConferencePaidVendor-hosted
On the radar
Announced without a date, or expected from past editions. Not confirmed.
ISACA OC GRC Summit
Held on June 2 in 2026; 2027 date not yet announced
Tustin Ranch Golf Club, Tustin (2026 venue) · Metro area
ExpectedSummitPaid
LayerOne 2027
Usually held in late May; 2027 dates not yet announced
Pasadena Hilton, Pasadena (2026 venue) · Regional
ExpectedConferencePaid
OSSCON (Offensive Security Society conference)
Held on October 18 in 2025; no 2026 edition announced
Titan Student Union, Cal State Fullerton, Fullerton (2025 venue) · Metro area
ExpectedConferenceFree
Groups & associations
Professional associations
Cloud Security Alliance (CSA) Orange County
5271 California Ave, Suite 100, Irvine · Metro area
Monthly Wednesday evening meetings at 5:30 p.m., usually late in the month
Many meetings are sponsored by a vendor and include a product talk or hands-on workshop. No meeting after 2026-09-23 was posted during research.
Free
meetup.com/cloud-security-alliance-csa-orange-c… [S28] [S29]
HTCIA Southern California Chapter
Southern California; joins Orange County socials · Metro area
Irregular; joint socials with ISSA OC and others
High Technology Cyber Investigation Association (digital forensics and cyber investigations). The last_activity date is the SoCalSec social at Golden Road Brewing, Anaheim, listed on the HTCIA calendar for 2026-09-21.
Members only
IAPP KnowledgeNet Orange County
Orange County · Metro area
Occasional in-person happy hours and virtual KnowledgeNet sessions
Privacy-focused; KnowledgeNets are free for IAPP members. The last_activity date is the in-person SoCal Chapters Summer Happy Hour (August 12, 2026), seen in the search listing of the chapter page; the live page now shows no scheduled meetings.
Members only
ISACA Orange County Chapter
Irvine, Tustin, Fountain Valley, Bellflower and other Orange County area venues, plus virtual sessions · Metro area
Monthly events (virtual lunch talks and in-person workshops), certification review courses and an annual GRC summit
The chapter events list marks CommuITyDay 2026 (October 3, 2026, Olive Crest, Bellflower) as past. Other 2026 sessions were in Irvine (RSM on 2026-09-02, Ingram Micro on 2026-04-14), the GRC Summit was in Tustin on 2026-06-02, and the next GRC conference is in Fountain Valley. Member prices are lower; registration is through Cvent.
Paid
ISSA Orange County
Orange County; 2026 socials in Anaheim, Placentia, Pomona and Long Beach · Metro area
Roughly monthly evening security socials (6:00 to 8:00 p.m.) at rotating breweries, plus occasional roundtables
Socials invite guests; membership is paid. Recent events: Security Social on 2026-09-21 (Golden Road Brewing, Anaheim) and the Cyber Industry Career Night on 2026-09-24 at Fullerton College. The 2026-05-08 roundtable was in Costa Mesa. No dated future event was posted. The chapter event pages on issa-oc.starchapter.com could not be read on 2026-10-08 (rate limited), so last_activity comes from the earlier Orange County research; the chapter home page lists no dated events.
Free
OWASP Orange County
Irvine (venues vary) · Metro area
Evening meetings, often a Thursday, 6:00 to 8:00 p.m.; some are joint with CSA Orange County
The chapter page says meetings are posted on Eventbrite (2026 meetings on January 29 and February 26). The latest meeting found is the joint CSA and OWASP meeting on 2026-06-24 at 5271 California Ave, Irvine.
Free
Hacker and grassroots groups
DC714 (DEF CON Group Orange County)
Coastline College Garden Grove Center, 12901 S. Euclid St., Room 251, Garden Grove · Metro area
Second Wednesday of the month, 6:00 to 8:00 p.m., except January and August
Beginner-friendly. The speakers page marks the 2026-09-09 DEF CON recap as held.
Free
Irvine Underground
Blue Hummingbird Coffee and Kitchen, 1 Park Plaza, Suite 165, Irvine (subject to change) · Metro area
Second Friday of the month, 7:00 p.m.
Hackers, sysadmins, security people and programmers; open to everyone. Gulliver's Restaurant, the long-time venue, closed; meetings moved to Blue Hummingbird in July 2026 and the site says the location may change month to month. The September 2026 meeting was on the third Friday (September 18).
Free
OC2600
23b Hackerspace, 418 E. Commonwealth Ave, Unit 1, Fullerton · Metro area
First Friday of the month, 7:00 p.m.
Open to all ages and skill levels. Meetings are posted on Meetup through December 2026.
Free
Inclusion and career communities
Women's Society of Cyberjutsu SoCal
Los Angeles and Long Beach (workshops rotate) · Metro area
Roughly monthly workshops, in person or online
In-person workshops in 2026 were in Beverly Hills and at Long Beach City College; the August and September 2026 sessions were online.
Free
Education and student groups
Coastline College STORM Cyber Center and Xploit Club
Coastline College Garden Grove Center, 12901 S. Euclid St., Garden Grove · Metro area
Club competitions during the school year; free community symposia and mixers a few times a year
Coastline College is an NSA CAE school. The Xploit Club is for Coastline students; STORM symposia and mixers are open to the community. The last_activity date is the NCyTE x STORM Community Connector (May 13, 2026). The STORM Cyber Center site returned HTTP 403 on 2026-10-08, so the May 13, 2026 date was not re-read.
Free
Cyber@UCI
UC Irvine, Irvine · Metro area
During the academic year: Thursday workshops (6:00 to 7:00 p.m.) and CCDC team training on Tuesdays (7:00 p.m., CS1 428) and Fridays (7:00 p.m., DBH 6011)
UC Irvine's cybersecurity club and competition teams (CCDC, CPTC, CTFs). The last_activity date is the 2026 Information Technology Competition at Cal Poly Pomona (April 19, 2026). Its fall 2026 events are listed separately; the twice-weekly CCDC training sessions are not.
Students only
Fullerton College Hornet Security Education Center
Fullerton College, 321 E. Chapman Ave, Fullerton · Metro area
Occasional public events (Cybersecurity Awareness Fair in October, career night)
Fullerton College is an NSA CAE school. It hosted the Cyber Industry Career Night on 2026-09-24 with ISACA OC, ISSA OC, ASIS OC and HTCIA SoCal.
Free
Offensive Security Society (Cal State Fullerton)
Cal State Fullerton, Fullerton · Metro area
Workshops and competition teams during the academic year; schedule on the club calendar
Non-CSUF students may attend workshops. The public calendar has no entry after 2026-02-28.
Quiet: last activity Feb 2026Free
Adjacent communities
23b Shop (hackerspace)
418 E. Commonwealth Ave, Fullerton · Metro area
Open house ("Shopluck") on some Friday evenings; weekly online hacker happy hour on Thursdays
Adjacent: a general hackerspace (electronics, machining, computers) rather than a security group. It hosts OC2600.
Free
Directory checklist
10 of 19 national directories list a local chapter
| Directory | Result |
|---|---|
| 2600 Meetings | Local chapter: OC2600 |
| CISA Regional Offices | Nearest: CISA Region 9; no public Orange County events posted |
| Cloud Security Alliance | Local chapter: Cloud Security Alliance (CSA) Orange County |
| Cyversity (formerly ICMCP) Chapters | Nearest: Cyversity Southern California Chapter (no dated activity found) |
| DEF CON Groups | Local chapter: DC714 (DEF CON Group Orange County) |
| HTCIA | Local chapter: HTCIA Southern California Chapter |
| IAPP KnowledgeNet | Local chapter: IAPP KnowledgeNet Orange County |
| InfraGard Members Alliances | Nearest: InfraGard Los Angeles Members Alliance |
| ISACA | Local chapter: ISACA Orange County Chapter |
| ISC2 | Nearest: ISC2 Los Angeles Chapter |
| ISSA | Local chapter: ISSA Orange County |
| NSA National Centers of Academic Excellence in Cybersecurity (NCAE-C) | Local chapter: Coastline College STORM Cyber Center and Xploit Club |
| OWASP | Local chapter: OWASP Orange County |
| SANS Institute | Nearest: SANS Security West 2027 (San Diego, May 10 to 15, 2027; listed under events) |
| SecureWorld | No chapter found |
| Security BSides | Nearest: BSides San Diego |
| TOOOL (The Open Organisation Of Lockpickers) | No chapter found |
| WiCyS (Women in CyberSecurity) Professional Affiliates | Nearest: WiCyS Los Angeles |
| Women's Society of Cyberjutsu (WSC) Chapters | Local chapter: Women's Society of Cyberjutsu SoCal |
Dormant groups
3 groups with no public activity for 18 months or more; 1 possibly dormant
- Google Cloud Security Irvine User Group: last public activity Nov 2024 [S49] [S50]
- OC Locksport (Lockpicking in Costa Mesa): last public activity Nov 2024 [S51]
- Orange County Cybersecurity (Meetup group): last public activity Jul 2023 [S52]
- Women in CyberSecurity (WiCyS) Student Chapter at UC Irvine: Possibly dormant: last public activity May 2025 [S53] [S54]
Field notes
- The county government offices are in Santa Ana, but no public security meeting hosted there was found; Santa Ana College lists a Cyber Center and IT pathway, and its CyberSAC club has no dated activity on any page that could be read.
- Irvine Underground lost its long-time venue in 2026 and posts each month's location on its website; its Meetup page lists the November and December 2026 venues as TBD, and the September 2026 meeting was held on the third Friday.
- OWASP Orange County posts meetings on Eventbrite rather than Meetup, and the latest meeting found was a joint session with CSA Orange County on June 24, 2026.
- CSA Orange County meetings are usually sponsored by a vendor and include a product talk or hands-on workshop; RSVP is required and walk-ins are not allowed.
- IAPP, HTCIA and ISACA events are aimed at members; ISSA OC socials and the hacker groups are open to anyone.
- Cyber@UCI events are for UC Irvine students, and its events page shows month and day without a year, so individual events are not listed here.
- Several listed conferences (ChannelPro DEFEND, FutureCon, GPSEC, Planet Cyber Sec, GovTech) are run by companies and include vendor sessions.
Sources
Numbered references for the listings on this page.
- S1https://www.irvineunderground.org/
- S2https://www.irvineunderground.org/september-18th-2026/
- S3https://www.meetup.com/irvine-underground/
- S4https://dc714.net/
- S5https://dc714.net/speakers.html
- S6https://www.isacaoc.com/events/beyond-boundaries-future-of-grc-isaca-iia-oc-chapter
- S7https://luma.com/ryhhrocc
- S8https://luma.com/socalhtcia
- S9https://www.meetup.com/cloud-security-alliance-csa-orange-county/events/316859285/
- S10https://futureconevents.com/events/san-diego-ca-2026/
- S11https://www.meetup.com/oc2600/
- S12https://www.2600.com/meetings/
- S13https://events.channelpronetwork.com/2026-channelpro-defend-anaheim/
- S14https://events.govtech.com/Southern-California-Public-Sector-Cybersecurity-Summit
- S15https://sdcybercon.org/
- S16https://luma.com/tybvdxwt
- S17https://cyberriskalliance.swoogo.com/san-diego-spring-2027
- S18https://planetcybersec.com/
- S19https://www.guidepointsecurity.com/gpsec/
- S20https://go.guidepointsecurity.com/2026_04_02_SW_GPSEC_SoCal_OC_01-Request-to-Register-Page.html
- S21https://futureconevents.com/events/los-angeles-ca-2027/
- S22https://www.sans.org/cyber-security-training-events/security-west-2027
- S23https://futureconevents.com/events/orange-county-ca-2027/
- S24https://www.isacaoc.com/events/isaca-oc-grc-summit-2026
- S25https://www.layerone.org/
- S26https://www.layerone.org/venue/
- S27https://www.osscsuf.org/osscon
- S28https://www.meetup.com/cloud-security-alliance-csa-orange-county/
- S29https://www.meetup.com/cloud-security-alliance-csa-orange-county/events/316317548/
- S30https://www.htcia.org/socal/
- S31https://members.htcia.org/events-calendar/Details/socalsec-september-2026-1912576?sourceTypeId=Hub
- S32https://iapp.org/community/iapp-chapters/orange-county-ca
- S33https://www.isacaoc.com/events
- S34https://engage.isaca.org/orangecountychapter/home
- S35https://issa-oc.org/
- S36https://owasp.org/www-chapter-orange-county/
- S37https://www.eventbrite.com/o/owasp-orange-county-120900036333
- S38https://www.meetup.com/cloud-security-alliance-csa-orange-county/events/315081817/
- S39https://www.meetup.com/socal-women-in-cybersecurity/
- S40https://www.coastline.edu/student-life/clubs-and-organizations/xploit.php
- S41https://cyberuci.com/
- S42https://cyberuci.com/events
- S43https://ics.uci.edu/2026/05/05/student-teams-win-2026-information-technology-competition/
- S44https://cybersecurity.fullcoll.edu/events/list/?eventDisplay=past
- S45https://www.osscsuf.org/
- S46https://www.osscsuf.org/calendar
- S47https://www.meetup.com/23bshop/
- S48https://www.23bshop.org/
- S49https://usergroups.security.googlecloudcommunity.com/irvine-user-group/
- S50https://usergroups.security.googlecloudcommunity.com/events/details/google-cloud-security-irvine-user-group-presents-irvine-user-group-inaugural-meeting/
- S51https://www.meetup.com/oclocksport/
- S52https://www.meetup.com/orangecountycybersecurity/
- S53https://sites.uci.edu/wicys/events/
- S54https://sites.uci.edu/wicys/news/