Chimmani
Priyatham ChimmaniGrounded research
EHS & ESG Data and Systems

I turn plant, safety, and operational data into decisions executives can act on.

Priyatham Chimmani

Owns the enterprise EHS system end to end, leads the team · Hexion Inc., global chemicals manufacturer · Columbus, Ohio

I own the enterprise EHS management system for a global chemicals manufacturer end to end, build the data and AI platforms underneath it, and lead the people who ship it.

Safety numbers are only as good as the denominator and the citation underneath them.

LocationColumbus, OH
CurrentHexion Inc.
Site visits·····
NowRunning: Foundry ontology migration at Hexion, six Grounded repos in public draft
01/ 08

Impact

Three systems now running in daily use at Hexion.

I-01
Situation

Every global site needed a modernized way to capture safety data inside an aging enterprise EHS application.

Built

Led an end-to-end refresh of the application across two phases, from requirements through global rollout.

Changed

80+ feature enhancements shipped, reshaping how every global site captures safety data.

Read the case study
I-02
Situation

Leadership needed to see where competitive opportunity sat across dozens of micro markets, without a shared model.

Built

A Python linear-programming engine that scores and ranks those markets.

Changed

Adopted company-wide and awarded the Transformation Award.

Read the case study
I-03
Situation

Contract, ERP, and warehouse data sat in separate systems nobody could audit together.

Built

Databricks medallion pipelines unifying Icertis, Dynamics 365, SAP, and Gensuite feeds.

Changed

Migrated the platform to Unity Catalog governance, making every downstream report audit-ready.

Read the case study
0
Platform enhancements
0
Automated alerting KPIs
0
Reporting time removed
0
Company awards
Architecture I've built Nine source systems, one governed path to a report. Hover or tap any block to trace it.
19 components · 5 tiers · source systems through to executive decisions
02/ 08
Safety numbers are only as good as the denominator and the citation underneath them.

Research

Real OSHA data says the screening step every EHS team assumes is optional actually decides the number.

Feature · OSHA ITA, 2016 to 2024

Screening turns noise into a series

Unscreened TRIR collapses to 0.016 in 2019 and 0.280 in 2024. The screened series stays between 3.1 and 4.6 across all nine years.

Why it matters: a benchmark or peer-group comparison built on the unscreened series is reading a data artifact, not a safety trend.

TRIR by year, 2016 to 2024, screened versus unscreened012345201620172018201920202021202220232024Unscreened TRIR 2016: 2.729Unscreened TRIR 2017: 2.634Unscreened TRIR 2018: 2.920Unscreened TRIR 2019: 0.016Unscreened TRIR 2020: 2.792Unscreened TRIR 2021: 2.385Unscreened TRIR 2022: 2.661Unscreened TRIR 2023: 1.380Unscreened TRIR 2024: 0.280Screened TRIR 2016: 3.921Screened TRIR 2017: 3.998Screened TRIR 2018: 4.069Screened TRIR 2019: 4.018Screened TRIR 2020: 4.491Screened TRIR 2021: 4.368Screened TRIR 2022: 4.605Screened TRIR 2023: 3.147Screened TRIR 2024: 3.642
ScreenedUnscreened

Source: ehs-osha-analysis, committed summary of screened and unscreened TRIR by year. Hover or tab across points for values.

Headline finding · OSHA ITA, nine years
2.07% of filings carry 96.7% of hours

Strip those filings and the TRIR correction swings from 1.4x to 249x between years. It is not a portable constant, and any benchmark that treats it as one is wrong by an amount nobody has measured.

Real public data · reproducible from the repo
What is there

A draft paper, six public repositories with their own sites, and a plain statement of what has and has not been established. Real OSHA data where claimed, simulation where labelled.

Programme status: 810 tests passing, screened TRIR 3.98.

RES-001 Grounded - the research site Apparatus The programme home: why ungrounded retrieval fails structurally in safety-critical work, what was built in response, and the full draft paper with 197 verified references. Open RES-002 OSHA data quality - 2.8M establishment filings Apparatus Nine years of real ITA data. 2.07% of filings carry 96.7% of reported hours; the resulting TRIR correction swings from 1.4x to 249x between years and is not a portable constant. Linking 1,238,236 establishments across years, a flagged establishment is re-flagged the next year 27.2% of the time against 0.95% for a clean one (pooled odds ratio 39.1, kappa 0.28). Open RES-003 Grounding evaluation benchmark Apparatus A question corpus built around plausible-but-dangerous adjacent answers, with scoring that rewards abstention over confabulation. 68 items, 23 minimal pairs, 8 domains. First baselines: random floor 52.1%, TF-IDF retrieval 27.0%, oracle 100%; no language model has been run. Open RES-004 Human factors ontology Apparatus Contextual error-risk factors as an OWL ontology, crosswalked to SPAR-H, CREAM, HFACS and HSE PIFs, with a rule engine that emits a derivation trace for every conclusion. Open RES-005 SEM for safety risk - what it can and cannot tell you Simulation A from-scratch estimator and simulation studies on coefficient recovery, rare-event calibration and model equivalence. Everything simulated by design; nothing is a claim about a real site. Open RES-006 Human-capital cost-benefit calculator Apparatus Counting lost time, retraining, productivity and morale alongside booked costs roughly doubles the measured return on a safety investment. Sensitivity and Monte Carlo modes. Open
03/ 08

Selected Work

Six systems shipped, from an enterprise ontology to a live public app.

W-01
In flight

Enterprise Ontology & Digital Twin

Leading the company's migration to Palantir Foundry - a single ontology and digital twin spanning EHS, supply chain, procurement, and finance, replacing scattered reporting with one governed model.

Palantir FoundryOntologyDigital twin
W-02
Award winner

Micro Market Model

A Python linear-programming engine that pinpoints competitive opportunities across micro markets. Earned the company's Transformation Award.

PythonLP optimizationMarket analytics
W-03
Platform

Gensuite Refresh - Phase 1 & 2

Led an end-to-end refresh of the enterprise EHS application, delivering 80+ feature enhancements that reshaped how every global site captures safety data.

Benchmark ESGRequirementsGlobal rollout
W-04
AI

Enterprise Agent Layer

Natural-language-query and summarization agents on Copilot Studio, Claude Code, and Codex, with an MCP architecture grounding them in live systems and deterministic algorithms keeping answers reproducible.

MCPOpenAI APICopilot StudioClaude Code
W-05
Data platform

Medallion Pipelines & Unity Catalog

Production Databricks pipelines unifying Icertis contracts, a 40-entity Dynamics 365 model, SAP, and Gensuite warehouse feeds into audit-ready reporting - then migrated wholesale to Unity Catalog governance.

DatabricksPySparkCI/CDREST & GraphQL
W-06
Personal build

Resin & Wood Market Weather Brief

A live decision-support app tracking public operating signals for chemicals, resins, engineered wood, and construction demand - EPA, Census, and BLS data turned into scored, tiered state-level actions and scenario models.

AstroJavaScriptPublic dataLeaflet
Open the live app
04/ 08

Experience

From CRM reporting to owning a chemicals manufacturer's global safety system in six years.

EHS Data Analyst
Nov 2025 - Present
Hexion Inc. · Columbus, OH
  • Lead the enterprise migration to Palantir Foundry across every business function.
  • Guide a blended five-person delivery team of internal analysts and vendor partners.
  • Author board meeting decks and safety strategy presentations; advise the ELT and C-suite daily.
  • Selected by the CIO, VP, and General Manager for a two-week assignment at the Pernis site in the Port of Rotterdam, assessing every data flow at a 24/7 plant.
  • Modernized org-wide Power BI architecture and led the migration to Microsoft Fabric with Microsoft.
EHS Metrics and Systems Specialist
Sep 2023 - Nov 2025
Hexion Inc. · Columbus, OH
  • Sole global administrator of Benchmark ESG (Gensuite), owning the platform and vendor relationship end to end.
  • Built the core Power BI dashboard suite - Safety, Product Stewardship, Spills - as the single source of truth for EHS performance.
  • Owned OSHA, MSHA, and ACC regulatory compliance reporting and government submissions.
Data Analyst - Network Operations Center
Nov 2021 - Jan 2022
Amazon · Hyderabad, India
  • Delivered analytics for Prime expansion across North America and Europe, supporting measurable subscriber and ROI growth.
CRM Analyst
Jul 2019 - Oct 2021
Decathlon · Hyderabad, India
  • Built Qlik and Tableau reporting for executive KPIs, driving measurable gains in retention and operational efficiency.
05/ 08

Reports

Every diagram here responds to real input, including 1.18 million actual OSHA filings.

06/ 08

Focus

Four disciplines, each owned end to end.

EHS & ESG Systems

Global owner of the enterprise EHS management system and the regulatory reporting that depends on it.

Benchmark ESG / GensuiteOSHAMSHAACCEncampDiligent

Data Engineering

Production pipelines that turn scattered source systems into governed, audit-ready reporting.

DatabricksPySparkUnity CatalogPythonSQLSAPDynamics 365Foundry

Applied AI

Agents that let people ask questions of enterprise data in plain language - grounded, auditable, cost-aware.

Copilot StudioClaude CodeOpenAI APICodexMCPNLQ agents

Decision Support

Board-level reporting, safety strategy, and optimization models used by leadership across the business.

Power BIDAXMicrosoft FabricTableauLP optimization
07/ 08

Wins

Leadership singled this work out three separate times.

Leadership Award

International IT leadership assignment - Pernis site, Port of Rotterdam, Netherlands

Transformation Award

Micro Market Model - Python LP optimization for competitive market opportunity

STAR Award

End-to-end design and implementation of site safety incentive program metrics

08/ 08

Education

The statistics kept up with the job; a PhD in applied AI is next.

Doctor of Philosophy - Technology and Artificial Intelligence Started 2026 Southwest Baptist University · Springfield, MO
Master of Science - Applied Statistics and Decision Analytics 2022 - 2023 Western Illinois University · Macomb, IL
Post-Baccalaureate Certificate - Business Analytics 2023 Western Illinois University · Macomb, IL
Bachelor of Technology - Computer Science and Engineering 2016 - 2020 Jawaharlal Nehru Technological University · Hyderabad, India