Rietmeijer ContractAdvisory
Interim Support

Interim Contract Manager for Capital Projects and Operations

Senior contracting and procurement capacity for a defined assignment: a project phase, a tender or a contract portfolio. From the early project phase through execution and operations.

I take on an interim assignment as an independent professional: with an agreed scope and deliverables, responsible for the result, and working closely with the project or asset team. I pay particular attention to the early phase: it is often under-resourced, while this is where the most important contractual choices are made.

Ernst Rietmeijer

Experienced Capacity at the Moments That Matter

Early phase

Before the organisation is in place

Contract strategy, package structure and tender documents are needed while budget and a contracts function are not yet there.

Tender & award

Critical project phase

A project enters tendering, award or execution without senior capacity for contract management, changes and claims.

Any phase

Gap in mid-project

A key contract manager leaves: contract management, changes and claims need to continue without a gap.

Execution

Turnaround or shutdown

Dedicated contracting and contractor coordination for a turnaround or shutdown.

Operations

MRO contract renewal

Existing maintenance contracts need restructuring around performance and cost efficiency.

Any phase

Independent review

A contract strategy or tender approach needs an independent check before a key commitment.

The Interim Role Follows the Project Phase

Early phaseFront-End Loading
ExecutionDelivery & contract management
OperationsMaintenance & MRO
FEL 1Business case
FEL 2Concept & contract strategy
FEL 3Definition, tender & firm prices
FEL 1 – FEL 3Contracts & Procurement LeadContract strategy, package structure, market approach and tender plan
FEL 3 & ExecutionInterim Contract ManagerTender and firm prices before the investment decision; award, contract management, changes and claims
Execution & OperationsInterim Procurement ManagerSourcing, MRO contracts, framework agreements and supplier performance

In most capital projects the main contracts are tendered in FEL 3, so that firm prices support the investment decision (FID). Each assignment has an agreed scope and duration, and can cover one phase or several.

What the Assignment Leaves Behind

Early phase

Contract Strategy & Procurement Readiness

Deliverables
  • Contract strategy
  • Package and interface matrix
  • Risk allocation principles
  • Procurement roadmap
Execution

Project Contracting & Contract Management

Deliverables
  • Tender plan and evaluation framework
  • Bid comparison and negotiation
  • Contract management in execution
  • Change and claim management
Operations

MRO Strategy & Contract Optimisation

Deliverables
  • Contract assessment
  • Supplier model
  • KPI framework
  • Improvement roadmap
Governance

Contract Governance & Frameworks

Deliverables
  • Approval matrix
  • Procurement procedures
  • Contract templates
  • Supplier review framework

Recent Work in Practice

From independent assignments and earlier senior roles, described in general terms in line with confidentiality agreements.

Pilot & Demo · Governance

Contractual Framework for a Multi-User Pilot & Demonstration Environment

For an industrial innovation hub where technology developers, scale-ups and industrial partners run pilot and demonstration projects side by side: designed the contractual framework, governance model and operating principles.

Renewables · Project Contracting

Contracting Strategy for a First-of-a-Kind Circular Pyrolysis Plant

For a plant converting plastic waste into circular pyrolysis oil with a new technology: developed and executed the contracting strategy for construction and led tendering and contractor engagement. See Early Contractor Selection Without Losing Price Certainty.

Terminals · Project Execution

Capex Contracts for Tank Terminal Extensions and Modifications

For extensions and modifications at operational tank terminals: contracting strategies and execution models for mechanical, tank and civil projects, including EPC contract development, and contract management with structured change and claim management.

Terminals · MRO

Performance-Based Maintenance Contracts for Tank Terminals

For mechanical maintenance at multiple Dutch tank terminals: renewed the contracts into performance-based unit-rate contracts and introduced contractor and supplier management on contract KPIs.

How an Interim Assignment Works

01Intake & scopeAssignment, deliverables and duration agreed
02Rapid startContract position and risks clear within weeks
03DeliveryResponsible for the agreed deliverables, close to the team
04Structured handoverFiles, decisions and knowledge stay behind
“Ernst’s contribution as procurement manager was critical to the success of the project. He combines strategic procurement expertise with a practical, hands-on approach, ensuring cost optimization and strong partnerships with local suppliers.”
Paul de Hoog, Pioneer in Circular Chemistry · More recommendations

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