Calyxo, Inc. is a medical device company headquartered in Pleasanton, California, USA. The company was founded in 2016 to address the profound need for improved kidney stone treatment. Kidney stone disease is a common, painful condition that consumes vast amounts of healthcare resources each year. Our team is led by executives and investors with a proven track record of commercializing paradigm-shifting devices to meet unmet needs within urology.

Are you ready to change the future of kidney stone treatment? We are seeking high achievers who want to be part of a dynamic team working in a fun, diverse atmosphere.

Summary:

As the Sr. Buyer, you will have end-to-end (cradle-to-grave) ownership of procurement execution and outcomes for assigned commodities, suppliers, and Contract Manufacturers (CMs). This role is accountable for material availability, supplier and CM execution performance, inventory health, and cost effectiveness, operating within established category strategies and commercial frameworks defined by Category Management. The Sr. Buyer partners cross-functionally and externally to ensure supply continuity, scalability, and compliance while delivering measurable execution-level procurement results that support manufacturing operations, product changes, and business growth.

In This Role, You Will:

Cradle-to-Grave Procurement Execution Ownership

Own the full procurement execution lifecycle (cradle-to-grave) for assigned scope—from purchase order execution and delivery through issue resolution, performance management, and close-out.
Serve as the single point of accountability for supplier and CM execution, ensuring cost, quality, delivery, and service objectives are met throughout the lifecycle of parts and programs.
Negotiate and procure materials, components, equipment, supplies, and services within established category strategies, contracts, and commercial frameworks defined by Category Management.

Sourcing Collaboration and Support, including Supplier Selection and Negotiations

Collaborate with Calyxo Sourcing teams on supplier selection, negotiations, and implementation
Support spot buys and tactical supplier identification and purchasing
Cross-train with Sourcing teams to act as support and backup roles on the sourcing team, as needed

Planning, Ordering, and Execution Discipline

Plan, execute, and monitor purchase orders using MRP, Kanban, Blanket POs, reschedules, and other appropriate planning techniques to meet production requirements.
Execute pull-ins, push-outs, cancellations, and expedites at minimal total cost while protecting continuity of supply.
Process returns to suppliers and ensure applicable credits are applied.
Work closely with Receiving, Finance, and suppliers to reconcile discrepancies in receiving and invoicing.

Contract Manufacturer (CM) Execution Management

Actively manage Contract Manufacturers (CMs) as an extension of Calyxo’s manufacturing operations, ensuring material readiness, capacity alignment, and execution to production requirements.
Partner with CMs to support scale-up, engineering changes, and product transitions, ensuring sourcing execution, lead times, and inventory plans remain aligned to demand.
Collaborate with Supply Chain, Quality, and Engineering to assess CM execution performance, drive corrective actions, and ensure timely implementation of agreed improvements.
Support supplier or CM transitions and implementations led by Category Management, ensuring effective execution and continuity of supply.

Inventory Strategy Execution & Forecast Alignment

Own inventory execution strategies for assigned materials, balancing service levels, working capital, lead times, and demand variability within defined inventory policies.
Monitor and adjust inventory targets to prevent shortages and excess, proactively identifying risks and executing mitigation actions.
Review forecasts with key stakeholders, integrate feedback, and ensure supply execution remains aligned to demand and operational priorities.

Supplier Performance, Quality Partnership, and Compliance