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GreatWhiteSharkSecurity Group · GWSSG
Team

Operators, engineers, analysts.

34 people across four continents. Most have done the work somewhere else first — in a federal agency, a Fortune-100 SOC, an exchange, or a research group whose name you wouldn't recognize. Some you can read about. Some you can't.

Leadership

The people who sign the deliverables.

Marcus Reyes
Founder & Chief Executive

Eighteen years across federal red-team and adversary emulation. Started GWSSG to build the platform he kept wishing his agency could buy.

Anya Iversen
Chief Intelligence Officer

Tracked nation-state operators for twelve years. Author of the GW actor-cluster taxonomy. Reads adversary forum traffic for fun.

Jonah Park
Head of Platform

Designed the temporal property graph store. Sleeps when the ingest dashboard is green. Has strong opinions about distributed checkpoints.

Sade Okafor
Head of AI Research

Embeddings, retrieval, and the part where you make the model stop lying. PhD in graph representation learning.

Operators & Engineers

The people on your bridge at three in the morning.

Rhett Halstead
Principal Threat Analyst

Energy and OT specialist. Has personally walked four control rooms back from the brink.

Mira Larsson
Principal Reverse Engineer

Malware tooling and implant analysis. Speaks IDA Pro fluently. Owes nothing to anybody's vendor.

Demetri Volkov
Lead, DNS Telemetry

Owns our passive DNS pipeline. Keeps a printed copy of RFC 1035 on his desk and a half-decent attitude about it.

Priya Achari
Lead, Scanning Fleet

Built our distributed scanner from a blank text editor. Nine geographies, one config plane.

Tomás Beltrán
Senior Intelligence Analyst

Latin-America desk. Translates carder forum chatter into briefings nobody else has.

Hyejin Cho
Senior ML Engineer

Embedding pipelines and vector store ops. Treats the alert collapser like a pet she has to feed twice a day.

Daniel Whitfield
Senior Detection Engineer

Writes the rules and counter-rules. Has a dim view of dashboards that don't tell you what to do.

Linnea Hoffman
Senior Cloud Security Engineer

Cloud exposure and identity surface. Knows precisely how IAM has betrayed you in the last week.

Ezra Klein-Maddox
Senior Graph Engineer

Lives in the property graph. Will optimize a Cypher query into something you didn't think was legal.

Noor Hassani
Senior CT Analyst

Reads certificate transparency logs the way other people read the morning news.

Calvin Osei
Lead, Incident Bridge

Twenty-year veteran of incident response. The voice you actually want to hear at 2:47 a.m.

Vera Rasmussen
Counsel & Compliance

Keeps the deliverables auditable, the engagements clean, and the contracts tight.

Advisory Board

Senior counsel from operators we trust.

Adm. Robert Hennings (ret.)
Strategic Advisor

Three decades in maritime cyber operations. On the board for the strategic perspective and the colorful sea metaphors.

Dr. Imani Brooks
AI Ethics Advisor

Faculty in ML systems. Keeps us honest about what our models can and can't claim.

Henrik Sloan
Industry Advisor

Former CISO of a global financial. Knows what a board actually wants to read.

Dr. Yuki Tanabe
Research Advisor

Internet measurement researcher. Brings the academic rigor; takes the operational reality back to the lab.

We hire deliberately. Here's the bar.

Operators with shipped work, analysts with sourced opinions, engineers with strong tastes. If that's you, the door is open.