Senior Buyer/Planner Location: Natick, MA | On-site About Busek Busek develops advanced propulsion and aerospace technologies for commercial, civil, and government space missions. Our hardware supports cutting-edge spacecraft and satellite programs, offering employees the opportunity to work on highly technical, first-of-a-kind systems in a collaborative and mission-driven environment. Position Overview Busek Co. Inc. is seeking a Senior Buyer/Planner to support research and development, engineering, and manufacturing activities through the procurement of commercial off-the-shelf components and highly specialized, custom-manufactured parts for spacecraft subsystems. This role is critical to supporting R&D programs, prototype builds, and development schedules while ensuring timely, cost-effective sourcing of components that meet stringent aerospace quality standards. The ideal candidate will possess strong negotiation and supplier management skills, an understanding of procurement best practices, and experience supporting engineering and manufacturing teams in a fast-paced, technically demanding environment. Key Responsibilities • Source, evaluate, and select suppliers for materials, components, and services, including custom-machined parts, specialized hardware, and space-grade components. • Support R&D and engineering teams by procuring components and materials for prototype builds, testing, and new product development. • Manage end-to-end procurement activities, from requests for quotation and supplier negotiations to cost and terms analysis. • Prepare and issue purchase orders, ensuring proper approvals, accurate specifications, and delivery schedules. • Monitor purchase order status and proactively communicate delays or supply issues that could affect development, testing, or production schedules. • Work closely with engineering, R&D, production, and quality teams to understand technical requirements and identify suitable suppliers. • Maintain accurate procurement records, including pricing, delivery, quality, and vendor performance history. • Develop and maintain supplier relationships to support evolving engineering requirements, short lead times, and changing development priorities. • Support supplier audits, vendor onboarding, and continuous improvement initiatives. • Ensure compliance with internal procedures and applicable quality, regulatory, and U.S. government requirements. Qualifications • Minimum 5 years of experience in purchasing, procurement, or a buyer/planner role, preferably within aerospace, defense, R&D, or high-tech manufacturing. • Proven track record of successful vendor negotiations and supplier relationship management. • Experience sourcing custom components and working with suppliers to meet technical specifications and delivery requirements. • Proficiency with ERP or purchase order management systems. • Ability to interpret engineering drawings, specifications, bills of materials, and other technical documentation. • Strong organizational skills, attention to detail, and the ability to manage multiple priorities in a dynamic environment. • Excellent communication and interpersonal skills, with the ability to work effectively with engineers and other technical stakeholders. Preferred Skills • Experience supporting R&D, prototype builds, engineering development, or low-volume manufacturing. • Experience in an AS9100D- or ISO-certified environment. • Familiarity with aerospace components, machining processes, and specialized manufacturing suppliers. • Working knowledge of cost drivers in low-volume, high-reliability hardware procurement. • Ability to source parts when designs, specifications, and quantities are still evolving. Benefits • Medical, dental, and vision insurance. • 401(k) retirement plan. • Paid vacation, sick time, and holidays. • Life and disability insurance. • Employee Assistance Program. • Professional development opportunities. • Performance bonus opportunities. What We Offer At Busek, you'll contribute to advanced spacecraft propulsion and aerospace technologies while working alongside knowledgeable, collaborative colleagues. Our Natick facilities include more than 30,000 square feet of R&D, manufacturing, and testing space, with over 20 vacuum chambers supporting advanced development and testing. Busek is recognized for placing the first U.S. Hall Effect Thruster in space. U.S. Citizenship Requirement Due to the nature of work performed under U.S. government contracts and applicable security and contractual requirements, this position is limited to U.S. citizens.