Tomasz Janiszewski is a seasoned executive and recognised authority in the energy and finance sectors, currently serving as Chief Investment Officer at Columbus Energy Group in Poland. In this capacity, he leads investment strategy and execution for large-scale infrastructure initiatives, with a focus on renewable energy systems (RESS), battery energy storage systems (BESS), and energy infrastructure projects across the Group.
He previously held the position of Vice President and Member of the Management Board at Columbus Energy Trade Company, where he was also responsible for large-scale renewable energy investment finance. With over three decades of professional experience spanning renewable energy, infrastructure development, project finance, and strategic advisory, Tomasz has consistently demonstrated leadership in the advancement of Poland’s clean energy transition.
Among his recent accomplishments, he oversaw the delivery of Poland’s first and one of Europe’s largest commercial BESS installations (133 MW / 0.55 GWh), backed by the country's inaugural capacity market contract for large-scale BESS, effective from 2027. He is currently managing a 3.6 GW BESS pipeline alongside major photovoltaic and wind energy projects, as well as DSO integration services tailored to high-demand consumers such as data centres and industrial campuses. His remit encompasses project structuring, capital planning, energy trading, long-term cPPA contracts, and emerging technologies, including perovskite solar cells.
Prior to joining Columbus Energy, Tomasz served as Managing Director for Investment Finance at Polskie Sieci Elektroenergetyczne S.A. (PSE), the Polish Transmission System Operator. There, he managed a strategic investment portfolio exceeding PLN 42 billion, covering 180 national and cross- border infrastructure projects. His contributions included grid modernisation, offshore wind support schemes, and the development of EU interconnectors such as the Harmony Link. He also led the implementation of enterprise-level systems including SAP S/4HANA, improving operational and financial efficiency.
Earlier in his career, Tomasz held senior roles in leading global institutions including GE Capital CEE (operating across Poland, the UK, Central and Eastern Europe, and Germany), and Barclays PLC in the UK. He also spent over 15 years with Big Four firms—PwC, EY, and KPMG—advising on financial structuring, risk management, and strategic investment planning for infrastructure, energy, and financial sector clients.
A certified LEAN Six Sigma Master Black Belt, Tomasz is known for his analytical precision, strategic foresight, and ability to engineer complex financing models using national and EU funding, development finance institutions, and private equity. He is widely respected for his commitment to sustainable development, operational excellence, and collaborative leadership in advancing the energy transformation agenda.