Martin Lettvin, CPE, PMP

With more than a decade in electrical construction and a focus on distributed generation and renewable energy, my work spans the full cost lifecycle of a project, from indicative budgets and capital and operating forecasts through bid development, cost controls, and post-project variance analysis.

That experience comes from both sides of the meter, including self-perform engineering, procurement, and construction (EPC) and electrical preconstruction across utility-scale renewables, medium and high voltage distribution, data centers, and telecommunications systems.

Utility-side work including project controls and lifecycle estimating for distributed energy resource interconnections, substations, and capacity expansion studies. Every estimate brings together input from developers, engineers, project managers, procurement, and field operations, and turns it into a number that holds up.

Alongside estimating, I build tools that small estimating teams often lack the capacity to build for themselves: calculation engines, pipeline automations, and business intelligence models that bring project data together for benchmarking and reporting.

This work draws on proven experience with the Microsoft Power Platform, Excel, VBA, SQL, JSON, M, Dataverse, JavaScript, and Python to build M365 native experiences, semantic models, data frameworks, Power Pivot back ends, Power BI front ends, and portfolio-level dashboard reporting. The underlying idea is that every estimate is data worth keeping, not a one-off spreadsheet, and the scenario models on this site are built on the same principle.

Connect with me below to explore custom solutions that integrate with your estimating workflows.