SeaSec East
Wed, Nov 4, 2026 · 6:00 p.m.
Rotates between Bellevue, Redmond and Kirkland · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Washington
Tacoma, WA cybersecurity events & groups
Tacoma has a DEF CON group that meets on the last Friday of the month at Devil's Reef, a second-Tuesday lockpicking night at The Church Cantina, and an ISSA Rainier chapter that meets every other month at the Washington State History Museum. ISSA Rainier and the ISACA Mt. Rainier chapter hold a joint free meeting there on October 29, 2026, and the Washington Digital Government Summit comes to the Greater Tacoma Convention Center on November 12, 2026. Most larger meetings and conferences, including ISSA Puget Sound, SecureWorld Seattle and BSides Seattle (March 5 to 6, 2027), are 30 to 40 miles north in the Seattle area.
Start here
- DCG Tacoma (DC253): Free, open DEF CON group in Tacoma with a monthly social and a lockpicking night on October 13, 2026.
- ISSA Rainier Chapter: Free evening chapter meetings in downtown Tacoma, open to non-members.
- Seattle 2600: Free monthly hacker meeting on first Fridays, the nearest 2600 group.
Six months at a glance
Datebook
November 2026
SecureWorld Seattle 2026
Wed, Nov 4 to Thu, Nov 5, 2026
Meydenbauer Center, Bellevue · Metro area
12 to 18 CPE credits depending on pass. Garage parking is validated for Conference and PLUS pass holders.
ConfirmedConferencePaidVendor-hosted
Black Lodge Research
Thu, Nov 5, 2026 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Seattle 2600
Fri, Nov 6, 2026 · 6:00 p.m.
800 E Thomas St, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Nov 12, 2026 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Identity, AI & Cybersecurity: Securing the Enterprise in an Agentic World
Thu, Nov 12, 2026 · 4:30 p.m. to 8:00 p.m.
Bellevue City Hall, 450 110th Ave NE, Bellevue · Metro area
Talks on identity security, phishing-resistant credentials and AI agents, with networking before and after.
ConfirmedMeetupFree
Washington Digital Government Summit 2026
Thu, Nov 12, 2026 · Registration opens 8:00 a.m.
Greater Tacoma Convention Center, 1500 Commerce St, Tacoma
Run by Government Technology and the Center for Digital Government. Open to the public sector only; registration is free. A general technology event for state, local and education leaders with cybersecurity sessions (for example Beyond Cybersecurity: Managing the New Risk Landscape); the keynote speaker is Washington's state CIO.
ConfirmedSummitFreeVendor-hosted
Black Lodge Research
Thu, Nov 19, 2026 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Symbol Crash: Hardware Hacking Hands-On Workshop
Thu, Nov 19, 2026 · 6:00 p.m.
Seattle Makers, 3012 16th Ave W, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Seattle Hackers Anonymous (SHA)
Tue, Nov 24, 2026 · 7:00 p.m.
Pine Box, 1600 Melrose Ave, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Nov 26, 2026 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
December 2026
Seattle Lockpicking and Locksport
Tue, Dec 1, 2026 · 7:00 p.m.
Fremont Brewing Urban Beer Garden, 1050 N 34th St, Seattle; also The Church Cantina, Tacoma, and Bellevue or Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
SeaSec East
Wed, Dec 2, 2026 · 6:00 p.m.
Rotates between Bellevue, Redmond and Kirkland · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Dec 3, 2026 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
INTERFACE Seattle 2026
Thu, Dec 3, 2026 · 8:30 a.m. to 4:30 p.m.
Seattle Convention Center · Metro area
IT infrastructure and security conference run by F2F Events with CPE-accredited sessions. Reserved for qualified IT professionals; consultants and sales staff must buy a sponsorship. Supporting associations include ISACA Puget Sound, ISC2 Seattle, ISSA Puget Sound and InfraGard Washington.
ConfirmedConferenceVetting requiredVendor-hosted
Seattle 2600
Fri, Dec 4, 2026 · 6:00 p.m.
800 E Thomas St, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Dec 10, 2026 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Dec 17, 2026 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Symbol Crash: Hardware Hacking Hands-On Workshop
Thu, Dec 17, 2026 · 6:00 p.m.
Seattle Makers, 3012 16th Ave W, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Dec 24, 2026 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Seattle Hackers Anonymous (SHA)
Tue, Dec 29, 2026 · 7:00 p.m.
Pine Box, 1600 Melrose Ave, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Dec 31, 2026 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
January 2027
Seattle 2600
Fri, Jan 1, 2027 · 6:00 p.m.
800 E Thomas St, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Seattle Lockpicking and Locksport
Tue, Jan 5, 2027 · 7:00 p.m.
Fremont Brewing Urban Beer Garden, 1050 N 34th St, Seattle; also The Church Cantina, Tacoma, and Bellevue or Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
SeaSec East
Wed, Jan 6, 2027 · 6:00 p.m.
Rotates between Bellevue, Redmond and Kirkland · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Jan 7, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Jan 14, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Jan 21, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Symbol Crash: Hardware Hacking Hands-On Workshop
Thu, Jan 21, 2027 · 6:00 p.m.
Seattle Makers, 3012 16th Ave W, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Seattle Hackers Anonymous (SHA)
Tue, Jan 26, 2027 · 7:00 p.m.
Pine Box, 1600 Melrose Ave, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Jan 28, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
February 2027
Seattle Lockpicking and Locksport
Tue, Feb 2, 2027 · 7:00 p.m.
Fremont Brewing Urban Beer Garden, 1050 N 34th St, Seattle; also The Church Cantina, Tacoma, and Bellevue or Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
SeaSec East
Wed, Feb 3, 2027 · 6:00 p.m.
Rotates between Bellevue, Redmond and Kirkland · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Feb 4, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Seattle 2600
Fri, Feb 5, 2027 · 6:00 p.m.
800 E Thomas St, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Feb 11, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Feb 18, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Symbol Crash: Hardware Hacking Hands-On Workshop
Thu, Feb 18, 2027 · 6:00 p.m.
Seattle Makers, 3012 16th Ave W, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Seattle Hackers Anonymous (SHA)
Tue, Feb 23, 2027 · 7:00 p.m.
Pine Box, 1600 Melrose Ave, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Feb 25, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
March 2027
Seattle Lockpicking and Locksport
Tue, Mar 2, 2027 · 7:00 p.m.
Fremont Brewing Urban Beer Garden, 1050 N 34th St, Seattle; also The Church Cantina, Tacoma, and Bellevue or Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
SeaSec East
Wed, Mar 3, 2027 · 6:00 p.m.
Rotates between Bellevue, Redmond and Kirkland · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Mar 4, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
BSides Seattle 2027
Fri, Mar 5 to Sat, Mar 6, 2027
Microsoft Building 92, 15010 NE 36th St, Redmond · Metro area
Theme: Human Still Required. Call for papers and call for sponsors are open. The organizer's tickets page still shows the 2026 prices ($99 to $125); 2027 prices were not posted.
ConfirmedConferencePaid
Seattle 2600
Fri, Mar 5, 2027 · 6:00 p.m.
800 E Thomas St, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Mar 11, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
SANS Seattle 2027
Mon, Mar 15 to Sat, Mar 20, 2027
Grand Hyatt Seattle, 721 Pine St, Seattle · Metro area
Early-bird discount on 4 to 6 day courses ends: Tue, Nov 24, 2026
Hotel group discount deadline: Tue, Feb 23, 2027
Refund deadline: Fri, Feb 26, 2027
Commercial training run by the SANS Institute. In person and live online (Pacific Time).
ConfirmedTrainingPaidVendor-hosted
Black Lodge Research
Thu, Mar 18, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Symbol Crash: Hardware Hacking Hands-On Workshop
Thu, Mar 18, 2027 · 6:00 p.m.
Seattle Makers, 3012 16th Ave W, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Mar 25, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Seattle Hackers Anonymous (SHA)
Tue, Mar 30, 2027 · 7:00 p.m.
Pine Box, 1600 Melrose Ave, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
April 2027
Black Lodge Research
Thu, Apr 1, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Seattle 2600
Fri, Apr 2, 2027 · 6:00 p.m.
800 E Thomas St, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Seattle Lockpicking and Locksport
Tue, Apr 6, 2027 · 7:00 p.m.
Fremont Brewing Urban Beer Garden, 1050 N 34th St, Seattle; also The Church Cantina, Tacoma, and Bellevue or Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
SeaSec East
Wed, Apr 7, 2027 · 6:00 p.m.
Rotates between Bellevue, Redmond and Kirkland · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Apr 8, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Apr 15, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Symbol Crash: Hardware Hacking Hands-On Workshop
Thu, Apr 15, 2027 · 6:00 p.m.
Seattle Makers, 3012 16th Ave W, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Apr 22, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Seattle Hackers Anonymous (SHA)
Tue, Apr 27, 2027 · 7:00 p.m.
Pine Box, 1600 Melrose Ave, Seattle · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Black Lodge Research
Thu, Apr 29, 2027 · 7:00 p.m.
17725 NE 65th St Ste A-155, Redmond · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Groups & associations
Professional associations
ISACA Mount Rainier Chapter
Tacoma and the South Sound; events at the Washington State History Museum, Tacoma · In the city
Irregular events and socials; the chapter's event list shows a joint meeting in Tacoma on October 29, 2026
The chapter's home page says it hosts quarterly social events and may offer additional training. Its October 1, 2026 activity was its president speaking at The Official Cybersecurity Summit in Bellevue, which the chapter lists on its own event list; no chapter-run meeting before the October 29, 2026 joint meeting was found.
Free
ISACA Puget Sound Chapter
Bellevue (Embassy Suites Bellevue for recent meetings) · Metro area
Monthly evening meetings, September through May, 6:00 p.m. to 7:30 p.m.
Meetings cost $20 for members and $30 for non-members and include 1 to 1.5 CPE credits. The chapter also runs a SheLeadsTech social mixer.
Paid
ISC2 Seattle Chapter
Mercer Island Community & Event Center, Mercer Island, and on Zoom · Metro area
Monthly hybrid meetings on Thursday evenings, 6:00 p.m.; meeting list on the chapter's ISC2 community page
The chapter domain isc2seattle.org forwards to the ISC2 chapter community platform, which lists the chapter's meetings. Its most recent meeting was on October 1, 2026 at the Mercer Island Community & Event Center: a group presentation on 250 years of cybersecurity. No later chapter meeting was listed on October 8, 2026.
Free
isc2chapters.isc2.org/topics/49928/page/overvie… [S24] [S25] [S26] [S27]
ISSA Puget Sound Chapter
Mercer Island Community & Event Center, 8236 SE 24th St, Mercer Island · Metro area
Monthly evening meetings with a featured speaker, usually on a Thursday; no August meeting in 2026
Serves the greater Seattle area and most of Western Washington. Registration is required; the organizer pages do not state a price.
Free
ISSA Rainier Chapter
Washington State History Museum, 1911 Pacific Ave, Tacoma · In the city
Every other month on a Thursday evening, 6:00 p.m.; 2026 meetings were in February, April, June and August
Events are free and open to the public; membership is not required. The chapter's 2026 plan on its events page mentions a regional all-day security conference in the first week of October, but no page for it was found. It holds a joint meeting with the ISACA Mt. Rainier chapter on October 29, 2026.
Free
OWASP Seattle
Online (Zoom); occasional in-person events in Seattle · Metro area
Monthly Security Social Lunch Hour on Zoom, second Wednesday at noon
Regular meetings are online. The most recent in-person event on its Meetup page was on August 21, 2025.
Free
Hacker and grassroots groups
Black Lodge Research
17725 NE 65th St Ste A-155, Redmond · Metro area
Open Hack Night every Thursday, 7:00 p.m.; member talks announced on Meetup
Information security hackerspace. Open Hack Night is open to anyone who wants to see the space. Its own website has not posted news since 2018; the Meetup page is current.
Free
DCG Tacoma (DC253)
Devil's Reef, Tacoma (21+); lockpicking nights at The Church Cantina, 5240 S Tacoma Way, Tacoma · In the city
Last Friday of each month at Devil's Reef (21+); second-Tuesday lockpicking night at The Church Cantina, 6:00 p.m.
Local DEF CON group. The group's site says to join its Discord and that Devil's Reef is 21+, with under-21 members using Discord. The site's Friday rule carries no date, so the most recent dated activity is the September 8, 2026 lockpicking night at The Church Cantina, hosted through the Seattle Lockpicking and Locksport Meetup group.
Free
SeaSec East
Rotates between Bellevue, Redmond and Kirkland · Metro area
First Wednesday of every month, 6:00 p.m.; venue rotates, check each event
Casual dinner-table networking for security practitioners, typically 4 to 8 people; dinner is pay your own way. Venues include restaurants, food courts and Black Lodge Research.
Free
Seattle 2600
800 E Thomas St, Seattle · Metro area
First Friday of every month, 6:00 p.m. to 8:00 p.m.
Part of the worldwide 2600 Magazine meeting network. The website names Gearhouse Coffee; the Meetup page names Base Camp at the same address, 800 E Thomas St Ste A.
Free
Seattle Hackers Anonymous (SHA)
Pine Box, 1600 Melrose Ave, Seattle · Metro area
Almost always the last Tuesday of the month, 7:00 p.m. to 9:00 p.m.
Short 5 to 10 minute talks on computer and physical security, pentesting, electronics and programming. No formal membership. The group started in August 2026 and held its first meeting on August 25, 2026. Its website header reads "Seattle Hackers Association"; the text and Meetup page use Seattle Hackers Anonymous.
Free
Seattle Lockpicking and Locksport
Fremont Brewing Urban Beer Garden, 1050 N 34th St, Seattle; also The Church Cantina, Tacoma, and Bellevue or Redmond · Metro area
Seattle: first Tuesday, 7:00 p.m. to 9:00 p.m. at Fremont Brewing. Tacoma: second Tuesday, 6:00 p.m. at The Church Cantina. Eastside: third Tuesday, 7:00 p.m. in Redmond or Bellevue.
Not a TOOOL chapter. The Tacoma night is run with DC253 and falls on the second Tuesday (next: October 13, 2026). Bring picks and locks or borrow the group's; walk-ups welcome. The recurrence shown is the Seattle meeting only. The Eastside meeting moved from Redmond to Bellevue Brewing in September 2026 while the Redmond venue was closed.
Free
Symbol Crash: Hardware Hacking Hands-On Workshop
Seattle Makers, 3012 16th Ave W, Seattle · Metro area
Third Thursday of the month, 6:00 p.m. to 8:00 p.m., unless rescheduled for holidays or hacker events
No cover charge. Bring a laptop (Linux or macOS preferred); practice hardware and interface tools are provided.
Free
Inclusion and career communities
WiCyS Western Washington Affiliate
Western Washington · Metro area
Occasional in-person socials and events; announced on LinkedIn and the affiliate mailing list
Most recent event found: a summer picnic on August 29, 2026.
Free
Public-private and government
Washington State InfraGard Chapter
Statewide; recent meetings at the University of Washington and The Museum of Flight, Seattle · Metro area
Member meetings a few times a year, plus an occasional public meeting; announced on LinkedIn
FBI-affiliated nonprofit. Membership is free but requires an application and vetting through infragard.fbi.gov. Its July 24, 2026 meeting at the University of Washington was open to the public; the September 11, 2026 program was members-only.
Members onlyVetting required
Education and student groups
Batman's Kitchen (University of Washington CTF team)
More Hall 220, University of Washington, Seattle · Metro area
Weekly meetings on Tuesdays, 5:30 p.m. to 7:30 p.m., in More Hall 230; special events and CTFs on Fridays, 5:30 p.m. to 7:30 p.m.
The University of Washington's cybersecurity club and CTF team; the university is an NCAE-C school. Open to UW students of any experience level. Its most recent dated activity is its own online competition, Batman's Kitchen CTF 2026, February 20 to 22, 2026; its previous-meetings page lists meetings through January 21, 2026 and no later dates.
Quiet: last activity Feb 2026Students only
GrayHats (UW Bothell cybersecurity club)
INV-140, University of Washington Bothell, Bothell · Metro area
During the academic year: general meetings Fridays, 12:00 p.m. to 2:00 p.m.; red team sessions Mondays, 1:30 p.m. to 3:30 p.m.; all in INV-140
Student-led club open to all skill levels and majors at UW Bothell. Runs workshops on offensive security, network defense and lockpicking, and trains for CCDC. The club site's most recent dated club activity is February 14, 2026 (a social at Southcenter); it also lists a Bsides Seattle outing on February 28, 2026. No dated meetings after February 2026 are posted.
Quiet: last activity Feb 2026Students only
Conference series
BSides Seattle
Redmond (2026 edition at Microsoft Building 92) · Metro area
Annual two-day community conference; held in April in 2025, February in 2026, and announced for March 5 to 6, 2027
Tickets were sold through the organizer's site for 2026 ($99 to $125 by purchase date). The 2027 edition is announced for March 5 to 6, 2027 with its call for papers and call for sponsors open.
Quiet: last activity Feb 2026Paid
SecureWorld Seattle
Meydenbauer Center, Bellevue · Metro area
Annual two-day conference in early November
Run by a commercial events company. The most recent edition took place November 5 to 6, 2025; the 2026 edition (November 4 to 5, 2026) is posted with registration open, so the quiet status reflects only the annual gap.
Quiet: last activity Nov 2025PaidVendor-hosted
Technical user groups
Cloud Security Alliance Seattle Chapter
Bellevue and Kirkland venues · Metro area
Irregular evening meetups, a few times a year; none announced
Chapter membership is free and open to all skill levels.
Quiet: last activity Feb 2026Free
Adjacent communities
Seattle Data, AI & Security
Bellevue City Hall, 450 110th Ave NE, Bellevue · Metro area
Roughly monthly evening talks at Bellevue City Hall, plus online events
Adjacent: a mixed data science, AI and security group, not security-focused. Many speakers come from large technology companies.
Free
Directory checklist
11 of 19 national directories list a local chapter
Dormant groups
2 groups with no public activity for 18 months or more
- CSNP Seattle CyberSecurity: last public activity Mar 2025 [S46]
- DC206: last public activity Feb 2020 [S47] [S48]
Field notes
- DC253's Friday meetings are at Devil's Reef, which is 21 and over; younger people use the group's Discord. The Tacoma lockpicking night is listed on the Seattle Lockpicking and Locksport Meetup page, not on the DC253 site.
- ISSA Rainier's site says it meets on the fourth Thursday of every other month; its 2026 meetings were in February, April, June and August, and the next is the joint October 29, 2026 meeting. The registration link for that meeting is on LinkedIn, which needs a sign-in.
- The ISACA Mt. Rainier chapter's event list also shows an October 14, 2026 fraud conference in Lacey run by another organization, and a December 3, 2026 INTERFACE Seattle partnership.
- The University of Washington Tacoma lists a GreyHat Group and a CyberSecurity and Aviation Club, but neither published a dated meeting, so neither is listed.
- Seattle-area groups and conferences (Seattle, Bellevue, Redmond, Mercer Island, Bothell) are 30 to 45 miles from Tacoma; check the venue before going.
- Seattle 2600 met at 3131 Western Ave from June to August 2026 and returned to 800 E Thomas St in September 2026. Its website names Gearhouse Coffee and its Meetup page names Base Camp; both give the same street address.
- OWASP Seattle's regular meetings are on Zoom. SeaSec East says it meets on the first Wednesday, but several 2026 meetings fell on the second Wednesday; check the Meetup event.
- Student clubs (Batman's Kitchen at UW Seattle, GrayHats at UW Bothell) are for enrolled students. Washington State InfraGard alternates members-only programs with occasional public meetings.
Sources
Numbered references for the listings on this page.
- S1https://www.meetup.com/seasec-east/
- S2https://events.secureworld.io/details/seattle-wa-2026/
- S3https://www.meetup.com/black-lodge-research/
- S4https://www.blacklodgeresearch.org/
- S5https://www.sea2600.net/
- S6https://www.meetup.com/seattle-2600/
- S7https://www.2600.com/meetings/
- S8https://www.meetup.com/seattledataaiandsecurity/events/316481475/
- S9https://events.govtech.com/Washington-Digital-Government-Summit
- S10https://www.meetup.com/symbol-crash-proper-hacker-training/
- S11https://seattlehackers.net/
- S12https://www.meetup.com/seattle-hackers-anonymous/
- S13https://www.meetup.com/seattle-lockpicking/
- S14https://www.seattlelocksport.com/
- S15https://f2fevents.com/event/sea26/
- S16https://f2fevents.com/register/?att=SEA
- S17https://www.bsidesseattle.com/
- S18https://www.sans.org/cyber-security-training-events/seattle-2027
- S19https://engage.isaca.org/mountrainierchapter/home
- S20https://engage.isaca.org/mountrainierchapter/events/calendar
- S21https://engage.isaca.org/pugetsoundchapter/home
- S22https://www.eventbrite.com/e/the-evolution-of-ai-tickets-1994375499807
- S23https://www.linkedin.com/company/isaca-psc
- S24https://isc2chapters.isc2.org/topics/49928/page/overview-f583202c-fb20-4400-9559-326323fa3d64
- S25https://isc2chapters.isc2.org/topics/49928/events/282885
- S26https://www.eventbrite.com/e/securing-ai-and-agentic-systems-presented-by-frank-simorjay-tickets-1985695627074
- S27https://www.eventbrite.com/e/isc2-seattle-chapter-february-meeting-secure-systems-in-the-age-of-ai-tickets-1980430750687
- S28https://issa-ps.org/events/
- S29https://www.linkedin.com/company/issa-puget-sound
- S30https://www.issa-rainier.org/events
- S31https://owasp.org/www-chapter-seattle/
- S32https://www.meetup.com/owasp-seattle-chapter/
- S33https://dc253.org/
- S34https://forum.defcon.org/node/231692
- S35https://www.meetup.com/seattle-lockpicking/events/316472876/
- S36https://www.wicys.org/wicys-western-washington/
- S37https://www.linkedin.com/company/wicys-western-washington-affiliate-page
- S38https://wainfragard.org/
- S39https://www.linkedin.com/company/wainfragard
- S40https://www.batmans.kitchen/
- S41https://ctftime.org/event/3098/
- S42https://grayhats.club/
- S43https://events.secureworld.io/details/seattle-wa-2025/
- S44https://www.meetup.com/cloud-security-alliance-seattle-chapter/
- S45https://www.meetup.com/seattledataaiandsecurity/
- S46https://www.meetup.com/seattlesecurity/
- S47https://www.dc206.org/
- S48https://forum.defcon.org/node/231491