Strategic Sourcing Manager – Contingent Workforce (f/m/x)

Location: GSW-Mars Global Services

in Mars Global Services

Commercial Department

Location: Warsaw

Hybrid working

• Fully virtual recruitment experience *

The Strategic Sourcing Manager – Contingent Workforce is a key leadership role within the Global Commercial organization, responsible for working in partnership with the P&O lead defining and executing the end-to-end category strategy for contingent labor, professional services, and outsourced talent solutions globally. This role acts as a trusted advisor to senior leadership, partnering closely with P&O, Legal, Finance, and various Business Units to design and deliver a world-class Contingent Workforce Program.

By leveraging deep industry expertise, the Strategic Sourcing Manager will drive commercial value, optimize supplier performance, mitigate co-employment and regulatory risks, and champion innovative talent acquisition and engagement models.

What would be your key responsibilities?

Category Strategy & Leadership

Strategic Roadmap: Develop in partnership with P&O lead to execute a comprehensive global category strategy for Contingent Workforce (including Managed Service Providers (MSP), Vendor Management Systems (VMS), temp-to-hire, Independent Contractors, and Statement of Work (SOW) services).

Demand and Spend Analysis: Analyze global spend data, market intelligence, and internal demand patterns to identify cost-saving opportunities, demand management strategies, and process efficiencies.

Stakeholder Alignment: Build strong, collaborative relationships with P&O/Talent Acquisition, Legal, IT, and Business leadership to align procurement strategies with corporate talent acquisition and workforce planning goals.

Sourcing, Negotiation & Contract Management

Sourcing Execution: Lead complex, end-to-end strategic sourcing initiatives (RFx processes) from requirements gathering and market research to vendor evaluation, selection, and onboarding.

Commercial Negotiation: Negotiate highly competitive commercial terms, service level agreements (SLAs), and pricing models (e.g., rate cards, markup caps, performance-based pricing).

Contract Excellence: Partner with Legal and Risk teams to draft, review, and execute master services agreements (MSAs), statements of work (SOWs), and non-disclosure agreements (NDAs) that minimize co-employment, compliance, and IP risks.

Supplier Performance & Relationship Management (SRM)

MSP & VMS Governance: Oversee the performance of key strategic partners, including the Managed Service Provider (MSP) and Vendor Management System (VMS) providers, ensuring adherence to strict SLAs and KPIs.

Supplier Business Reviews: Establish structured governance frameworks and conduct regular Quarterly Business Reviews (QBRs) with critical contingent labor suppliers to drive continuous improvement, innovation, and risk management.

Issue Resolution: Act as the primary escalation point for vendor disputes, performance bottlenecks, and contract non-compliance.

Governance, Risk & Compliance

• Compliance Frameworks: Ensure the Contingent Workforce program complies with global, federal, state, and local labor laws, including classification guidelines for independent contractors, co-employment boundaries, and data privacy regulations (e.g., GDPR).
• Policy Enforcement: Drive adherence to global sourcing policies, supplier diversity mandates, and corporate codes of conduct across all business units.
• What are we looking for?
• Experience: Minimum of 5–7 years of progressive experience in strategic sourcing, procurement, or category management, with at least 3 years specifically focused on the Contingent Workforce / Professional Services category.
• Education: Bachelor’s degree in Business Administration, Supply Chain Management, Human Resources, or a related field. Master's degree (MBA) or relevant professional certifications (e.g., CPSM, MCIPS, CCWP) is highly desirable.
• Proven track record of managing and optimizing MSP (Managed Service Provider) and VMS (Vendor Management System) models on a regional or global scale.
• Commercial & Legal Acumen: Exceptional negotiation skills and strong contract literacy. Demonstrated ability to structure complex agreements and mitigate labor compliance risks.
• Analytical Skills: Highly analytical mindset with advanced proficiency in Excel, data visualization tools, and procurement analytics software to translate raw data into actionable insights.
• Communication & Influence: Superb verbal and written communication skills. Proven capability to influence, align, and partner effectively with cross-functional executive stakeholders.
• Adaptability: Self-starter who thrives in a fast-paced, complex, and evolving corporate environment.
• Language Proficiency: Fluency in English (written and verbal) is required, as this role involves managing global stakeholders and negotiating international contracts.
• What can you expect from Mars?
• Contract of employment.
• Attractive financial conditions with Business Bonus and Christmas Bonus.
• We will also look after your safety and well-being by offering you rich benefits package including life insurance, private medical care, Employee Assistance Program fully covered by Mars, MultiBenefit Program.
• Lunch card.
• Extra savings scheme to support You in long perspective.
• Support in career building through personalized development plan.
• On-line shop with attractive discounts on our products that Your family and friend are going to love.
• Possibility to participate in volunteering initiatives during working hours.
• A modern and pet friendly office in the City Centre.
• Apply now and upload you profile in English.

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Additional Locations: SOC-Mars Polska sp. z o.o.