// about

Hi, I’m Richard.
I build in public.

I work in cybersecurity and SaaS product management, and on the side I tinker on personal projects with AI, writing down what I learn as I go. probl.me is that notebook, kept in the open.

Why this blog exists

I learn best by building the real thing and writing down what happened. Most posts about working with AI are either hype or fear. I wanted a third option: an honest log from someone actually shipping, including the parts that did not work.

So probl.me runs on the same principles I write about. The site is a static Astro build on GitHub Pages, the content moves through a pipeline of Claude agents, and every decision is documented. The process is the subject as much as the output.

What I’m building now

Two things, in parallel. probl.me is the blog you’re reading. Celly is a sister product I’m developing alongside it. Both are early, both are public, and both show up in what I write here.

If you’re a PM curious about AI, a developer figuring out how to work with agents, or someone non-technical who wants to manage their own software projects, I’m writing for you.

Richard Muffler
Richard Muffler
PM · security · AI builder
// the day job

Ten years shipping security products

The blog is the side quest. By day I’ve spent a decade leading endpoint and cybersecurity product strategy, from zero-to-GA launches to billion-dollar exits.

$859M
Taegis XDR acquired by Sophos
$1.5B
Cylance acquired by BlackBerry
100%
2024 MITRE ATT&CK detection
20×
CylancePROTECT license growth
2025 — NOW
Director of Product Management
ReversingLabs · Spectra Intelligence & Analyze

Own roadmap for threat-intelligence and malware-analysis platforms trusted by Fortune 500s and federal agencies. Brought Claude into the PM workflow to accelerate planning, requirements, and competitive analysis.

AI-native PM
2024 — 2025
Senior Staff Product Manager, Detections
SentinelOne

Led the detection roadmap across endpoint, cloud, and storage, owning backlog priorities for engineering teams across global time zones.

100% MITRE 2024+32% ARR
2023
Chief Product Officer
UpSight Security

Built product strategy from the ground up for an AI startup protecting endpoints with small language models against phishing, ransomware, and credential theft.

0 → 1
2022 — 2023
Principal Product Manager
Phosphorus Cybersecurity

Stood up agile processes and roadmap tooling for an xIoT security SaaS platform, improving delivery predictability across engineering, marketing, and sales.

2019 — 2022
Principal PM, Taegis XDR Endpoint
Dell Secureworks

Took a net-new EDR agent from zero to GA and led Secureworks' shift from managed services to a SaaS product org, scaling to four cross-functional squads across Windows, macOS, and Linux.

$859M exit3× Linux licenses
2016 — 2019
Senior PM, CylancePROTECT
BlackBerry (f.k.a. Cylance)

Owned the cross-platform endpoint agent across 7+ squads and 50+ engineers, and carried product continuity through a $1.5B merger with BlackBerry.

20× licenses$45M new business
// core competencies
EDR / Endpoint SecurityRoadmap & Backlog OwnershipSaaS Product MgmtGo-To-MarketMITRE ATT&CKAgile / Scrum / KanbanOEM & Partner MgmtAI/ML Product Advocacy

// what I write about · click a topic

Read along, or reach out

New posts twice a week. If something here is useful or wrong, I’d genuinely like to hear it.