Reddit, Inc.

Leading Reddit's software security team which focuses on AppSec, ProdSec, and a secure by default developer experience.

Head of Software Security

I'm designing and implementing security systems into all facets of Reddit's business. Protecting our company's employees and our website's users is my team's main focus.

Principal Security Architect

Aviso Ventures

Limited Partner

Bank of America

A senior security leader responsible for a large team, focused on Infrastructure Security Testing.
Responsibilities have included:

Management of our Vulnerability Scanning program continuously scanning millions of endpoints and thousands of web applications,
Enterprise Remediation Governance - partnering with our infrastructure owners to remediate vulnerabilities within given SLAs,
Management of our baseline compliance monitoring program, and
Management of our Internet Hygiene and perimeter analysis.

Previously led our cloud, container, and DevOps security programs for a hybrid, multi-cloud architecture.

SVP, Sr Security Manager, Cyber Security Defense

If it's a Cloud, Containerization, or DevOps initiative it's on my desk.

My job to work with all security control owners to operationalize their control in all major public cloud providers and Kubernetes or OpenShift environments.

SVP, Cyber Security Technology - Cloud Security Architect

Liquidmatrix Security Digest

- Write articles about current events in the security world and my personal take on them.
- Host a weekly podcast about current events in the security industry.

Writer & Podcast Co-Host

Goldman Sachs

- One of 3 CISOs of consumer facing divisions at Goldman. (Honest Dollar, Marcus, and GS Bank)

Vice President

Honest Dollar

Acting CISO, built an Information Security program from the ground up at a Financial Tech startup.
- Build secure SDLC, testing, and monitoring around a FinTech application running in Google Cloud on Kubernetes hosting a ReactJS, Go, iOS/Android application and backend financial connections.
- Manage creation and maintenance of policies
- Prove secure foundations during acquisition due diligence by Goldman Sachs

Head of Security [ Acquired by Goldman Sachs NYSE: GS ]

WhiteHat Security

Transitioned out of people management for my last stint at WhiteHat and really focused on industry leadership, sales enablement, content creation, partnership building, and new product launches.

This includes but is not limited to:
- Remediation Assistance & Guidance
- Secure Development Training
- Risk Based Vulnerability Prioritization
- SDLC Architecture Review
- AppSec Program Building
- Asset Discovery

Launched and co-hosted a weekly video podcast, entitled HackerKast, with the Founder of WhiteHat Security, Jeremiah Grossman, and VP of WhiteHat Labs, Robert "RSnake" Hansen.

Director, Security Services & Research

Started and built Whitehat’s first satellite office - focusing on hiring dozens of new security engineers in Houston while maintaining the Silicon Valley SaaS startup culture. Took the team from 0-65+

Hired, trained, and managed the team and helped handle WhiteHat’s exploding customer base which went from a few hundred websites to tens of thousands during this period.

Launched our new product lines beyond our bread and butter web app security testing which included Static Code Analysis and other early development lifecycle integrations to better address the DevOps movement.

Acting figurehead representing WhiteHat Security at many local and national security events presenting on his technical security research as well as emerging threats and trends in the web application security field. (mattjay.github.io/talks)

Sr. Manager, Threat Research Center

- Lead a team of application security testers and engineers

Threat Research Center Supervisor

Web Application penetration tester for the Threat Research Center at WhiteHat Security responsible for identification of security vulnerabilities across tens of thousands of web applications.

Application Security Specialist

San Jose State University

- Taught the web application security section of a undergraduate level class on information security.

Instructor

Adelphi University

- Taught the web application security section of a undergraduate senior seminar on information security.

VerSprite, LLC

Security Consultant

Over the last two decades, I’ve helped make hundreds of organizations more secure.

My mission is to leave the Internet a more secure place than I found it.

I’m helping organizations handle billions of users' information securely and increasing brand’s trust among their customers.

I’m currently the Security Architect of Reddit.

My portfolio:

→ I’m the security architect of Reddit where I help design security into all facets of the business for the 4th largest social network in the US and a top 20 most visited website globally
→ I teach company’s how to protect against cyber attacks and save tens of millions of dollars in losses.
→ I coach entrepreneurs and CISOs that need help with infrastructure, application, cloud, and security policies.
→ I advise early-stage companies in cyber security best practices and help pass technical due diligence from investors and potential acquirers.
→ I invest in early-stage private technology companies focusing on cybersecurity, software infrastructure, employee productivity, and B2B/SaaS.
→ I volunteer for a selection of non-profits who’s missions I connect with who wouldn’t otherwise be able to afford technical and specifically security consulting services..

My results:

→ 50,000k+ applications with less vulnerabilities than when I found them
→ 1B+ users data security reliant on systems I designed or secured
→ $100M+ of startup exits using my security due diligence
→ 0 advertisements or cold calls
→ 100% due diligence success rate

If you want to work with me, get in touch:

Email: mattjohansen@proton.me
Twitter: @mattjay

Matt Johansen

Ghost Security Inc.

Your security tools are holding you back. Legacy tools bury teams in noise, false positives, and manual grind. Developers are frustrated. AppSec teams can’t keep up.
At Ghost Security, we’ve built the first autonomous AppSec platform—designed by hackers who’ve been in the trenches. Our Agentic AI gives you crystal-clear visibility across your apps and APIs, automates posture management, and hunts down vulnerabilities in real time with laser precision.
The result? Less noise, fewer headaches, faster fixes. Security becomes your secret weapon, helping you innovate without fear.
Ghost Security: Stop chasing ghosts. Start securing apps.

Co-Founder and CEO

Shipshape

Investor

Harmonic Security

Atro

Investor and Advisor

Keep Aware

Minoa ⛵

Capitol AI

SC Media

SC Awards Judge - Venture Capital

Area 2 Farms

Fleet Device Management

CEO @ Ghost Security | Racing Enthusiast | Pug Life

With over 20 years experience in developing innovative cybersecurity solutions, I’m passionate about challenging the status quo and driving progress in the industry.

At Ghost Security, we prioritize teamwork, ownership, respect, integrity, and a customer-centric approach. 

Together, we’re committed to making applications safe for everyone.

Greg Martin

Today is a huge day for Ghost Security 👻  !!! We are officially announcing our much anticipated v2 update to our AI native code security engine Exorcist.  

Exorcist v2 now supports any type of application / framework not just web applications, introduces model-as-a-judge and even code security specialized reinforcement learning that improves analysis based on learning your own repos and programing styles!  

The future of application security is AI agents and Ghost is leading the way. See more on our technical blog post by our CTO Josh Larsen

https://lnkd.in/gVxSmbiF

Ghost is the first autonomous Appsec platform

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