Refinery Procurement Org Chart Explained
Last reviewed: 2026-05-01
A typical Gulf Coast refinery procurement organization is led by a VP of Supply Chain or Director of Procurement who reports to the site General Manager or corporate supply chain leadership. Below the director sit Category Managers who own specific spend areas such as MRO, rotating equipment, catalysts, and services. Each category manager supervises two to five buyers or procurement specialists who handle day to day purchase order execution and vendor management. Large multi unit sites may have 15 to 25 procurement staff.
Key Facts
VP of Supply Chain
The VP of Supply Chain or Chief Procurement Officer sits at the top of the procurement organization, typically at the corporate level. This role sets sourcing strategy, negotiates enterprise wide agreements, and oversees procurement across all operating sites. At single site operators, this role may be titled Director of Procurement and report to the Plant Manager.
Director of Procurement
The Director of Procurement manages the site level buying organization. This person owns the annual procurement budget, supplier performance metrics, and AVL governance. They coordinate with operations, maintenance, and engineering leadership to align purchasing priorities with plant reliability goals.
Category Managers
Category Managers are responsible for specific spend portfolios. Common categories include MRO and indirect materials, rotating and static equipment, instrumentation and electrical, catalysts and chemicals, and contracted services. Category Managers develop sourcing strategies, negotiate master service agreements, and evaluate supplier performance.
Buyers and Procurement Specialists
Buyers execute the daily purchasing activity, issuing purchase orders against blanket agreements or competitive quotes. They manage delivery schedules, resolve invoice discrepancies, and serve as the primary vendor contact for transactional procurement. A large site may have 8 to 12 buyers reporting across multiple category teams.
Frequently Asked Questions
Who has the final say on vendor selection at a refinery?
For MRO purchases, the Category Manager typically has final authority. For capital equipment and large service contracts, the Director of Procurement or VP of Supply Chain approves the vendor selection, often with input from engineering and operations.
Do refineries centralize or decentralize procurement?
Most major operators use a hybrid model. Strategic sourcing and enterprise agreements are managed centrally at the corporate level. Tactical buying and day to day purchase order execution happen at the site level with local buyers.
How does engineering influence procurement decisions?
Engineering specifies technical requirements for capital equipment and engineered components. Procurement cannot override an engineering specification, but they can challenge sole source requests and negotiate commercial terms once the technical selection is made.
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