Building evidence systems for how organizations make decisions.
Greenbaum Labs is an independent advisory and applied-AI practice founded by Justin R. Greenbaum. It works on organizational diagnostics, operating-model design and enterprise AI adoption.
The practice develops Decision & Responsibility Infrastructure®: methods and tools for making the structural conditions beneath organizational performance observable. Its diagnostic method is Coherence, which shows leaders where truth, decision authority and continuity are breaking down and stalling progress.
Truth
Vertex 01Does the narrative match the evidence?
Authority
Vertex 02Is it clear who can decide and who is accountable?
Continuity
Vertex 03Do decisions, their reasons, and the organization’s learning persist over time?
The external diagnostic measures the gap between what an organization says and what the world experiences. Its pipeline combines public evidence, local inference, multi-model analysis, adversarial review, and reproducible reporting.
Model inference runs on owned infrastructure. Automation may retrieve, compare, challenge, and suggest. Judgment remains human.
When the Skeptic Was the Variable
Calibration · April 2026Twenty-five experiments across two phases testing gemma4:31b against its own calibration. Prompt edits that lift sustain also break reproducibility. The larger model did not win.
Gemma 4 vs. Qwen3
Model Race · April 2026Two 30B-class models ran the full pipeline against the same corpus on parallel DGX Sparks. Speed, extraction quality, scoring fidelity, and diagnostic depth compared head-to-head.
73 Experiments to 0.000 Standard Deviation
Pipeline Hardening · March 2026Systematic pipeline hardening across four research tracks on distributed DGX Sparks. Prompt tuning, scoring calibration, finding thresholds, and adversarial debate until the pipeline converged.
Justin R. Greenbaum spent twenty years at Comcast moving from frontline technical support to Vice President, leading national and global customer operations across customer care, technical support, digital service and customer intelligence, global partner operations and high-trust functions.
Greenbaum Labs turns that operating experience into methods and working systems: organizational diagnostics, AI systems for customer intelligence, and measurement of how brands appear in AI-generated answers, with the methods and results published.