Gold-Miners was founded by two professionals who have operated at the highest levels of finance and business leadership — bringing real-world experience to every engagement.
Gold-Miners was founded on a simple but powerful conviction: most organizations are making strategic decisions with fundamentally incomplete cost information. Standard ERP reporting tells you what happened — it rarely tells you why, or where the margin actually lives.
Our founders have spent decades inside large financial institutions, manufacturing enterprises, and international consulting environments. They have seen firsthand how better cost intelligence transforms both strategy and execution — and built Gold-Miners to bring that capability to a broader range of organizations.
We are a small, senior team. Every engagement is led by a principal. There are no junior analysts running your projects unsupervised. When you work with Gold-Miners, you work with expertise.
Founded with the mission to bring C-suite-grade cost intelligence to organizations of all sizes.
Jimmy Koniarski brings over two decades of hands-on experience building costing and profitability models across multiple industries.
Udi Zilberberg's tenure as CEO and Head of Credit at Bank Leumi Switzerland brings a uniquely rigorous financial lens to every engagement.
Delivering end-to-end cost intelligence solutions powered by SQL Server, Power BI, and deep ERP expertise.
"The most dangerous number in a business is an average. Our work is to replace averages with the granular truth of where profit is actually made — and where it is being destroyed."Gold-Miners Founding Principle
Senior practitioners — not consultants fresh from university. Every engagement benefits from decades of real operational experience.
Jimmy has spent over 20 years designing, building, and deploying costing and profitability models for organizations across financial services, manufacturing, and services sectors. His work sits at the intersection of finance, operations, and technology — translating complex cost structures into clear, data-driven frameworks that management can act on.
He specializes in activity-based costing, multi-dimensional profitability analysis, and management reporting infrastructure. His engagements consistently deliver measurable improvements in margin visibility and pricing accuracy.
Jimmy architects the analytical frameworks at Gold-Miners and leads all model design and technical delivery.
Udi brings a rare combination of executive leadership and deep technical financial expertise. As former CEO of Bank Leumi Switzerland and Head of Credit, he has managed P&Ls at the highest level and understands the practical demands that boards and executive committees place on financial reporting and cost intelligence.
His experience spans credit risk, balance sheet management, regulatory capital frameworks, and strategic business transformation. He understands what good financial information looks like from the perspective of someone who has had to make decisions based on it under pressure.
Udi shapes the strategic framing of Gold-Miners engagements, ensuring that our technical outputs are always connected to the decisions that matter most to leadership.
We believe that approximate cost data leads to approximate decisions. Our models are built to deliver the highest achievable level of accuracy — because in cost intelligence, the detail is where the value lives.
We build models that can be explained, interrogated, and challenged. Every calculation has a visible logic. We have no tolerance for black boxes — in our work or in our relationships with clients.
Our success is measured not by client dependency but by client capability. We actively invest in knowledge transfer so that every organization we work with emerges stronger and more self-sufficient in managing cost intelligence.
We are a small team that takes on a selective number of engagements precisely because we refuse to dilute the quality of our work. Every deliverable we produce is reviewed by a principal before it reaches a client.
We take on a limited number of engagements each year to maintain quality. Reach out to start the conversation.
Get in Touch Explore Solutions