Senior Project Buyer - Transverse Management - Le Plessis Robinson / Rungis

About the company

CS, a subsidiary of the Sopra Steria group, is a leading player in the design, integration, and operation of critical systems. By joining our Defense & Security Business Unit, you will evolve at the heart of strategic challenges where technological innovation, operational excellence, and concrete utility meet to serve sovereignty and security.

Join a company where people, innovation, and impact meet.

Our uniqueness? The unique alliance between technological expertise, critical projects, and human commitment. As an innovative and responsible company, we build an ethical, inclusive, and future-oriented environment. Open to all talents, we believe that diversity is an asset.

Your tasks

Within our transverse management and reporting to our Purchasing Director, we are looking for a person to join our Purchasing department.

• Negotiate contractual, economic, and logistical conditions with suppliers
• Support the purchasing strategy of programs and projects in connection with industrial departments during upstream phases (pre-sales)
• Search for and qualify new suppliers (RFI/RFQ)
• Analyze technical and commercial offers
• Prepare orders, amendments, and contracts
• Ensure the interface between project, quality, legal, and financial teams
• Maintain supplier relationships

Requirements

With a Bac+5 degree or equivalent from an Engineering School, Business School, or a Master's in Purchasing, you have a minimum of 5 years of experience in industrial purchasing or project purchasing; experience in the Defense, Aeronautics, Space, or Critical Systems sectors would be desired. Professional English is required for this position.

• Ability to analyze technical and financial offers
• Mastery of purchasing techniques and negotiation of complex industrial contracts
• Good understanding of complex industrial environments (knowledge of the defense and security sector would be appreciated)
• Negotiation and management of contractual risks
• Awareness of intellectual property, export control, and customs issues

Personal qualities

• Strong negotiation skills
• Transverse leadership
• Analytical and synthesis skills
• Excellent interpersonal skills
• Rigor and sense of confidentiality

What we offer

At CS, we offer

• An enriching employee experience, driven by a work environment designed to promote flexibility, autonomy, and daily well-being.
• A complete integration process designed to onboard every talent from day one, and an Academy to develop your skills, enrich your expertise, and build professional paths that reflect who you are.
• A strong societal commitment: more than 3,000 associations supported, an active disability policy, an inclusive culture, a responsible digital approach, and partnerships such as Elles bougent to inspire the female talents of tomorrow.

…and many other benefits to discover by joining us!

Other

Please note: a relocation of our headquarters to Rungis is planned for the end of the second quarter of 2027.

#CSGROUP #Achat #Défense #Espace #Industrie As an inclusive and committed employer, our company works every day to fight against all forms of discrimination and promote a respectful working environment. This is why, committed to diversity and inclusion, we encourage all applications and all profiles.