Meet the Founder

Keystone Advisory was founded on a simple belief: strategy only creates value when it is executed well. Every engagement is personally led, combining strategic insight with hands-on execution to help organizations make better sourcing decisions—and ensure those decisions deliver lasting results.

Gregor Jarosz

CEO/FOUNDER

Where Strategy Meets Execution.

I help organizations improve how they source, manage, and govern technology and supplier relationships. From shaping sourcing strategies and negotiating complex agreements to establishing governance frameworks and supporting implementation, I work alongside clients to turn strategy into practical, lasting outcomes.

My experience spans global IT outsourcing, managed services, cloud and SaaS, vendor management, and sourcing transformation. I have led initiatives to reduce costs, strengthen supplier performance, improve governance, and build sourcing capabilities that support long-term business success.

I believe successful sourcing is about more than making the right decisions—it is about making those decisions happen. Strategy only creates value when it is executed well. That is why I stay involved throughout the entire journey—from defining the sourcing approach and engaging suppliers to negotiating agreements, supporting implementation, and embedding governance that continues to deliver value.

I work closely with business leaders, sourcing teams, IT organizations, and suppliers to solve complex sourcing challenges, build alignment, and achieve commercially sound outcomes. My approach is collaborative, pragmatic, and focused on delivering solutions that work in practice—not just on paper.

Whether supporting a targeted sourcing initiative or leading a broader transformation, I bring strategic perspective, commercial insight, and hands-on execution to help organizations achieve meaningful, sustainable results.

Customer Assignments

Discover real-world examples of how Keystone Advisory creates measurable business value for our clients.

Cost Optimization program

Defined and executed a cost optimization program for a large Nordic organization, identifying and prioritizing savings opportunities, optimizing the supplier portfolio, and leading commercial negotiations to exceed savings targets while strengthening commercial performance.

IT Outsourcing initiative

Designed and implemented an end-to-end IT outsourcing initiative for a global Client, from sourcing strategy and supplier selection through contract negotiation, implementation and governance, establishing a strong foundation for long-term supplier performance.

Sourcing Transformation

Designed and implemented contract and category management frameworks for a multinational organization, strengthening sourcing capabilities, improving stakeholder collaboration, and embedding more structured ways of working across the sourcing function.