When did Josh Lemos become CISO of GitLab?

The appointment was announced on June 13, 2023, per GlobeNewswire. The record holds the announcement, not a start date.

Where did Josh Lemos work before GitLab?

Before the appointment, Josh Lemos was Chief Information Security Officer at Block, according to the announcement (GlobeNewswire).

Executive record

Josh Lemos

Career profile: Josh Lemos on CISO Spotlights ↗

Josh Lemos was named Chief Information Security Officer at GitLab. The appointment was announced on June 13, 2023, per GlobeNewswire.

Before the appointment: Chief Information Security Officer at Block, per the same source.

The newest appointment at GitLab on the record is Chaim Mazal, Chief Information Security Officer, announced on June 9, 2026.

1 tracked move on the Wire · Updated September 30, 2026

Career timeline

Every move the record holds for Josh Lemos, newest first, with the earlier roles the announcements name.

June 13, 2023· Appointment
Named Chief Information Security Officer at GitLab
Source: GlobeNewswire (company announcement) ↗ · Move record
Before June 2023· Earlier role
Chief Information Security Officer at Block
Named in the announcement of the GitLab appointment · Source: GlobeNewswire (company announcement) ↗

The appointment

Announced June 13, 2023 · Source: GlobeNewswire (company announcement) ↗ · Move record

GitLab announced the appointment of Josh Lemos as Chief Information Security Officer. Lemos joins from Block, where he most recently served as CISO, and previously held senior security roles at Cylance and ServiceNow. He will lead the company's global security strategy and compliance initiatives.

The seat before and after

Who the record names in the same seat before and after Josh Lemos. Only what a dated record states.

GitLab

After

Chaim Mazal: named Chief Information Security Officer, announced on June 9, 2026 · record

The company: GitLab

Sector: Technology
Region: North America
Company record: Who runs security at GitLab: 2 confirmed moves on the record
Annual report: Cybersecurity section of the fiscal 2026 Form 10-K, filed March 17, 2026
Board oversight: Named in the filing: audit committee.
Vendor directory: GitLab sells security products, filed under Static application security testing. What it sells

Appointed in the same period

Other security chiefs in Technology whose appointment was announced within 90 days of Josh Lemos's, nearest first (8 of 10). The Technology bench

June 2023
Scott Putnam, Chief Information Security Officer at New Charter Technologies
July 18, 2023
Attila Torok, Chief Information Security Officer at GoTo
July 25, 2023
Danny Rittman, Chief Information Security Officer at Avant Technologies, Inc.
May 2023
Earl Duby, Chief Information Security Officer at Auxiom
July 31, 2023
Fredrick Lee, Chief Information Security Officer at Reddit
July 31, 2023
Marshall Erwin, Chief Information Security Officer at Fastly, Inc.
April 14, 2023
James Hill, Chief Information Security Officer at Cytracom
April 11, 2023
Mark Carter, Chief Information Security Officer at Vimeo

Record facts

Moves on the record: 1 confirmed move, each with its source
On the record since: September 30, 2026
Technology in 2026: 39 security-leadership appointments announced in the sector on the record

Questions about Josh Lemos

When did Josh Lemos become CISO of GitLab?: The appointment was announced on June 13, 2023, per GlobeNewswire. The record holds the announcement, not a start date.
Who holds the seat at GitLab now?: The newest appointment at GitLab on the record is Chaim Mazal, Chief Information Security Officer, announced on June 9, 2026.
Where did Josh Lemos work before GitLab?: Before the appointment, Josh Lemos was Chief Information Security Officer at Block, according to the announcement (GlobeNewswire).

Sources

1.GlobeNewswire (company announcement) ↗: the appointment at GitLab, June 13, 2023
2.SEC EDGAR: Form 10-K, fiscal 2026 ↗: the company's cybersecurity disclosure
3.CISO Spotlights career profile ↗: a fuller career profile on a sister site

This record begins with CISO Tribune's tracking in 2026.

Related guides

CISO Podcasts: The Shows That Interview Sitting Security Leaders
Four active podcasts interview sitting CISOs: CISO Series Podcast, Defense in Depth, The New CISO and Risky Business Features. Hosts, cadence, sponsors.
CISO, CSO, VP of Security, Head of Security: What the Titles Mean and What the Record Shows
A chief information security officer (CISO) owns information security. A chief security officer (CSO) usually adds physical security and investigations.
How to Become a CISO: Career Path, Experience and Certifications
There is no CISO degree and no single route to the seat. What the certification bodies, career guides and CISO Tribune's own record show about the path: typical prior roles, the certifications that actually come up, and how long it takes.