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John Marcinko
John Marcinko
Founder & Principal
John Marcinko is the Managing Director and Head Trader of JJM Capital Markets, with over 25 years of experience across power, natural gas, and financial markets. He has built and led trading desks at Ontario Power Generation, Scotia Capital, and Just Energy, most recently serving as EVP of Energy Trading. He leads firm strategy, capital deployment, and risk management, applying a disciplined blend of fundamental and technical analysis to generate consistent excess market returns.
William Marcinko
William Marcinko
Junior Risk Analyst (Part-Time)
William Marcinko is a Risk Analyst at JJM Capital Markets, supporting trading operations through data analytics, exposure monitoring, and performance reporting. He is responsible for tracking portfolio risk, producing daily risk and P&L reports, monitoring position limits, and assisting with scenario and stress testing.
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