Industry Sectors
- Upstream
- Midstream
- Downstream
- Renewables
Principal Areas of Practice
- Strategy Execution & Process Improvement
- Low Carbon Solutions
- ETRM System Implementation
- Business Process Design
- Supply Chain Optimization
- CRM Strategy
Professional Experience
Sam Stewart is a Dallas-based Managing Director in Opportune LLP’s Energy Supply & Trading practice. He specializes in translating commercial strategy into executable system and process transformations across physical and financial trading environments. Sam leads enterprise ETRM implementations, operating model redesigns, and system replacements that align trading, risk, accounting, and logistics functions.
With experience spanning traditional fuels, renewables, and transportation, he has delivered full lifecycle ETRM programs from strategy and business case development through go-live and stabilization. Sam is known for converting high-level recommendations into practical, execution-ready solutions by aligning people, process, and technology to drive measurable operational and financial outcomes.
Representative Projects
- Led implementation of renewable attribute tracking, improving credit position visibility, valuation accuracy, and compliance submissions to mitigate risk of failed audits. Outlined current scenarios, gaps, and inefficiencies. Completed IT improvements to close gaps, such as new integrations, streamlined COA processes, fuel pathway code and CI tracking, CI-Based pricing, and updated customer billing. Coordinate credit reporting and forecasting efforts in PowerBI and Alteryx tools.
- Business process design resource for a Canadian biofuels carbon credit program at Fortune 50 refiner. Defined forecasting, internal reporting, reconciliation, and carbon credit management processes. Coordinated stakeholder communications and issue management.
- Project manager for start-up renewable diesel refiner. Defined full-system ETRM business scenarios for commercial trades, marine logistics, inventory, and invoicing.
- Served as a strategic advisor during pre-system phase for a U.S. retailer’s acquisition of a large midstream asset; assessed operational readiness and systems fit.
- Led gap analyses, peer benchmarking, and strategy assessments for a Fortune 500 refiner evaluating asset-backed trading capabilities; identified key operating model shifts and system dependencies.
- Project Lead for Retail Marketing Salesforce and SAP enhancement project for HF Sinclair. Identified commercial gaps among Marketers, Contracts and Pricing, and leadership. Implemented 10+ new interfaces to improve discounts, station visibility, branded location AFEs, and distributor services.
- Project Lead for system BPO and KPI metrics reporting effort. Including, improving current processes, defining new commercial scenarios, and assisting with current day-to-day operations with emphasis in the front and middle office. Redefined failing rail processes, including freight and surcharge exceptions, inventory management, and in-transit tracking across all U.S. locations.
- Completed a successful RightAngle implementation at AmeriGas to replace a 30-year legacy mainframe system for the U.S. physical propane and derivatives business. Led front office deal capture, pricing and risk configuration, contract approvals, standard master data entry, and report generation.
