Category Buyer - (f/m) (M/F)

United Monolithic Semiconductors (UMS)EssonneEURESpublished 08/15/2026
Must-have:SAPCloudSecurity
Machine translation — original language: French.Show original

Location: Villebon-sur-Yvette, France

Let's build a future of trust together Thales is a world leader in high technologies specializing in three business sectors: Defense & Security, Aeronautics & Space, and Cyber & Digital. It develops products and solutions that contribute to a safer, more environmentally friendly, and more inclusive world. The Group invests nearly 4.5 billion euros per year in Research & Development, particularly in key innovation areas such as AI, cybersecurity, quantum, cloud technologies, and 6G. Thales has nearly 85,000 employees in 65 countries.

Our commitments, your benefits - A success driven by our technological excellence, your experience, and our shared ambition

  • An attractive compensation package
  • Continuous skill development: training courses, academies, and internal communities
  • An inclusive, caring environment that respects employee work-life balance
  • Recognized societal and environmental commitment

Your daily life With its 2 sites, in France (near Paris) and Germany (Ulm) and its sales offices in the United States and Asia, United Monolithic Semiconductors (UMS), a subsidiary of Airbus and Thales, designs, manufactures, and markets cutting-edge products and solutions based on microwave and Radio Frequency circuits for defense and security, space, telecommunications, automotive, and industry (sensors and medical and test instrumentation). Serving highly demanding customers worldwide, UMS is firmly recognized in the semiconductor industry for its technological excellence, high quality standards, its comprehensive range of products and solutions based on GaAs, GaN, and SiGe technologies, and its active participation in many innovative and collaborative European developments. With 430 highly motivated employees who are the source of its permanent success, UMS is committed to attracting and revealing the best talents. If you are motivated to work in an international and dynamic environment, to contribute through your talents and passion to finding innovative solutions for customers worldwide, and if you are looking for constantly renewed challenges and opportunities to grow: join us and build your future with UMS!

The Purchasing Department of our Villebon-sur-Yvette establishment (RER - Massy-Palaiseau) is recruiting a:

Category Buyer - (F/M)

WHO ARE YOU?

Do you have an Engineering degree or equivalent Master's degree (Bac+5) with a specialty in purchasing, and at least 8 years of experience in Purchasing? Do you have an interest in electronics and, ideally, technical knowledge in this field? Have your previous positions allowed you to practice Material Requirement Planning (MRP)? Do you master SAP as well as Excel? Are you recognized for your analytical and synthesis skills and a certain leadership? Finally, does your level of English allow for professional practice in both written and oral forms?

WHAT WE CAN ACCOMPLISH TOGETHER:

Integrated into the department and reporting to the Purchasing Manager, you will be primarily responsible for managing production raw materials (electronic and mechanical components), consumables, and all indirect purchases for the Villebon site. For the portfolios entrusted to you, the buyer will be responsible for:

  • Analyzing markets and company needs by conducting technological and economic monitoring and proactively exchanging with stakeholders,
  • Sourcing, selecting, and qualifying suppliers and their products through evaluations, audits, and calls for tender, in line with UMS's objectives and technical/technological roadmap,
  • Managing supplier and subcontractor panels dynamically based on their overall performance while ensuring base rationalization,
  • Establishing and presenting purchasing strategies for the