Viraj Desai

Phillips 66 — Humber Refinery England

P&ID Solutions Engineer · Team of 20 · Completed

• Digitised 450+ P&ID diagrams, from kickoff and scope alignment through triage, solving, QA and final ingestion into Plant Graph.
• Led triage activities and tracked issues via JIRA so diagrams were review-ready before solving began.
• Tagged equipment symbols to taxonomy standards, then mapped lines, asset connections and flow relationships into accurate knowledge graphs.
• Ran QA reviews and Health Checks on solved diagrams, applying client-specific solving conventions consistently across the full set.

ExxonMobil Sustainment Sarnia & Nanticoke, Canada · Rotterdam, Netherlands

Sustainment Solver/Engineer · Teams of 10 / 15 / 18 · Completed

• Analysed client-side revision changes across multiple sustainment cycles, ensuring updates landed in Plant Graph without breaking existing data.
• Flagged rendering, drafting and data anomalies to the triage lead ahead of team execution, improving downstream solving accuracy.
• Performed UUID mapping of post-solve data enrichments to prevent integration failures.
• Generated final Health Check reports and raised JIRA tickets for rectification, closing the quality loop across all three sites.

ML Team — Object Detection Internal

Domain SME · Team of 18 · Completed

• Worked with the ML team to train and fine-tune models for identifying P&ID symbols and lines, adapting LLM prompts per client site.
• Refined a text-association algorithm keying on both asset location and regex pattern matching, improving association accuracy.
• Built train/test/validation splits for every ExxonMobil site from site-specific complexity reports.

Evonik — Methionine Crystallisation AI/ML Model Germany / Singapore

• Developed an AI/ML predictive monitoring system on historical DCS/SCADA data to forecast solid accumulation and vacuum loss in crystallisers, reducing unplanned shutdowns.
• Engineered a dual-rate accumulation model using pressure spikes, enthalpy changes and flow dynamics to separate normal from aggravated fouling regimes.
• Introduced an Accumulation Index for real-time risk scoring, enabling proactive flushing alerts and cutting operator response time by 40%.
• Validated model accuracy with plant operations and integrated alerts into existing control-room dashboards.

ACWA Power — Desalination Plant Optimisation Saudi Arabia

• Mined DCS historian data to identify energy-saving opportunities across multiple RO desalination trains.
• Built digital process models to simulate and optimise specific energy consumption (kWh/m³), presenting case studies worth up to $407,000/year in potential savings.
• Prepared the techno-commercial proposal: solution architecture, implementation roadmap and ROI analysis.

Godrej — Distillation Column Retrofit Maharashtra, India

• Created a digital twin of the FADP distillation column in DWSIM to diagnose throughput limits and find retrofit opportunities.
• Ran on-site visits to gather operator insight and validate simulation assumptions, leading to a 10–15% feed-rate increase with minimal energy penalty.
• Deployed the optimised model to a cloud platform for real-time monitoring and scenario analysis.

ExxonMobil Baton Rouge Refinery — ESD Migration Louisiana, USA

Detailed Engineering Design · Team of 4 · Completed

• Executed ESD migration for 39 fire heaters, replacing decade-old pneumatic relay systems and reducing frequent trip incidents.
• Updated 200+ P&IDs, 39 Safety Critical Device lists, Cause & Effect diagrams and Process Control Narratives for the construction phase.
• Prepared Global Management of Change packages per furnace and coordinated IDC/ITR/approval workflow through WRENCH.
• Facilitated SIL vendor meetings and used exSILentia reports for SIS validation to API 560.

ADNOC Gas Processing — FEED & DED Abu Dhabi, UAE

• Delivered 25+ updated FEED P&IDs and defined isolation, vent/drain and ESD philosophies for the Habshan-3 NGI compressor conversion.
• Provided process support for instrumentation upgrades, revising 250+ P&IDs from obsolescence reports and I/O lists for WOOD PLC.
• Participated in alarm rationalisation workshops for ADNOC offshore facilities (NGTP, UZ, GPF).

BSS Technologies — Electro-Chlorination Plant Design

• Developed the basic engineering package — PFDs, P&IDs, H&MB, line sizing and equipment datasheets for seawater-based sodium hypochlorite generation.
• Performed hydraulic calculations and supported 3D modelling in AutoCAD 2020.
• Coordinated with vendors on pump curves and material specifications to ensure design compliance.