Senior Procurement Buyer

802573 Senior Procurement Buyer (ERP / Business Central) – Boston, MA – 4-Month Contract (Onsite)Location: Boston, MA (Onsite – 415 Summer Street)Schedule: Monday–Friday, 8 hours/dayDuration: 4-Month Contract (Potential Extension)Client: Commonwealth of MA – Massachusetts Convention Center Authority (MCCA) Job OverviewSigma, Inc. is seeking an experienced Senior Procurement Buyer to support procurement and contracting operations for a high-profile public sector client in Boston, MA.This role is ideal for professionals with strong ERP systems experience (Business Central preferred) and a deep understanding of the full procurement lifecycle, including sourcing, contract administration, and vendor management. Key ResponsibilitiesProcurement Systems & Data ManagementSupport procurement workflows within ERP systems (Microsoft Dynamics Business CentralPerform data entry, purchase order setup, and system maintenanceAssist in transitioning from manual to automated procurement processesPurchasing & Contract AdministrationManage procurement records, contracts, and Standing Orders (SOs)Create and track purchase orders, ensuring accurate delivery and receiptReview bids, quotes, and proposals; support vendor selectionMaintain organized procurement documentation (contracts, licenses, warranties)Support full contract lifecycle: solicitation ? evaluation ? negotiation ? execution ? monitoringStrategic Procurement & Process ImprovementConduct market research and cost analysisIdentify cost-saving opportunities and process improvementsSupport procurement audits, compliance, and reportingVendor & Stakeholder CollaborationCommunicate with vendors regarding orders, contracts, and delivery expectationsMonitor vendor performance and KPIsSupport supplier diversity initiatives and outreach effortsCollaborate with internal teams and warehouse operations Required QualificationsBachelor's degree in Business, Supply Chain, Procurement, or related field5+ years of procurement, purchasing, or contract administration experienceStrong experience with ERP systems (Microsoft Dynamics Business Central preferred)Proven knowledge of procurement lifecycle and contract managementExperience with RFPs, RFQs, bidding, and vendor negotiationsStrong data analysis and reporting skills (Excel proficiency required)Excellent organizational, communication, and stakeholder management skillsAbility to work onsite in Boston, MA Preferred QualificationsExperience in public sector or government procurementFamiliarity with supplier diversity programs and compliance requirementsExperience supporting capital projects or construction procurement