Seiji Hayashi
Denver,CO
Summary
Motivated, performance-focused procurement leader with extensive experience supporting utility-scale solar and wind projects. Skilled in major material sourcing, high-value negotiations, supplier management, and PO execution. Demonstrates the ability to drive project planning, mitigate risks, and align cross-functionally to achieve cost, schedule, and technical goals. Recognized for strategic communication, analytical decision-making, and developing scalable, standardized procurement processes. Holds a master’s degree in Supply Chain Management.
Overview
8
8
years of professional experience
1
1
Certification
Work History
Sourcing Specialist
Renewable Energy Systems (RES)
Denver, CO
12.2024 - Current
- Developed and implemented a diversified major-equipment supply base; negotiated commercial and contractual frameworks with multiple strategic suppliers now supporting 90%+ of the project pipeline, enhancing cost competitiveness, delivery reliability, and supply-chain resilience.
- Standardized AC/DC cable specifications across the project portfolio, securing volume-based pricing advantages, reducing lead times, and improving consistency across all builds.
- Led cross-functional alignment to ensure sourcing strategies met EPC contract requirements and complied with engineering and technical standards.
Procurement Specialist
RES
Denver, CO
07.2022 - 12.2024
- Mentored and developed procurement staff, driving standardized ERP/CM usage, best-practice adoption, and faster PO approval cycles; created standardized documentation that streamlined workflows and improved department-wide consistency.
- Partnered with Legal and stakeholders to implement warranties, reduce liability, and negotiate master terms, POs, MSAs, and EPC flow-downs with major suppliers, securing favorable terms aligned with project budgets and schedules.
- Consolidated supplier spend across the portfolio to leverage negotiated rebates, driving recurring annual cost savings.
Purchasing Specialist
Hose & Rubber Supply
Salt Lake City, UT
07.2021 - 07.2022
- Negotiated pricing, commercial terms, and agreements with manufacturers and vendors to secure competitive costs and support financial targets.
- Developed strong supplier relationships across domestic and international markets, enhancing supply reliability and reducing lead-time risk.
- Oversaw expediting activities by monitoring production, shipment status, and delivery milestones, resolving delays to maintain project and inventory schedules.
- Led RFQ/RFP events and performed cost and market analysis to strengthen negotiation strategies and drive savings across multiple product lines.
AP and Supply Chain Analyst Intern
University of Colorado Boulder
Boulder, CO
01.2021 - 06.2021
- Piloted OCR/ML invoice automation, cutting processing cycle time by 30% and reducing manual touchpoints.
- Implemented ACH payment workflows with U.S. Bank and Wells Fargo, generating ~$47K in monthly savings.
- Streamlined AP exception handling and approval routing, reducing invoice backlog and improving on-time payment rates.
Operations & Receiving Associate
University Orthopedic Center
Salt Lake City, UT
08.2017 - 01.2020
- Managed daily receiving functions, including verifying shipments, inspecting materials, and ensuring all items matched purchase orders and documentation requirements.
- Coordinated the intake, staging, and distribution of supplies and equipment, supporting smooth operations across departments.
Education
Master of Science - Supply Chain Management
University of Colorado Boulder
Boulder, CO01.2021
Bachelor of Science - Applied Economics, Minor Entrepreneurship
University of Utah
Salt Lake City, UT01.2021
Skills
- ERP systems (IFS, Unit4, TrulinX, PeopleSoft)
- Document management (Procore, SharePoint)
- Advanced Excel and data analysis
- Supplier relationship management
- Demand forecasting and inventory planning
- Spend analysis and cost reduction
- Supplier onboarding and qualification
Certification
- ASCM: Supply Chain Procurement Certification
- Datacamp: PostgreSQL, Intermediate SQL
- Datacamp: Functions and Stored Procedures
- Google Analytics Certificate
- PMP Certification: In Progress
Timeline
Sourcing Specialist
Renewable Energy Systems (RES)
12.2024 - Current
Procurement Specialist
RES
07.2022 - 12.2024
Purchasing Specialist
Hose & Rubber Supply
07.2021 - 07.2022
AP and Supply Chain Analyst Intern
University of Colorado Boulder
01.2021 - 06.2021
Operations & Receiving Associate
University Orthopedic Center
08.2017 - 01.2020
Master of Science - Supply Chain Management
University of Colorado Boulder
Bachelor of Science - Applied Economics, Minor Entrepreneurship
University of Utah