As a deputy mayor Michal Olszewski is responsible for supervising strategic planning and acquisition of EU funds, policy of regional development, tourism, labor market, development of the wharves of Vistula river, business licensing, housing policy, activities in the field of revitalization, environmental protection, development of green areas and urban forests, waste management, architecture and planning. He leads Warsaw Council for Innovation policy and is a member of it’s counterpart at the voivodship level. He also represents EUROCITIES, the largest organization of European cities, in the Smart Cities High Level Working Group in the European Commission. He is also involved in strengthening of the cooperation of local governments on national level and in metropolitan areas. In the years 2007-2015 he served as head of the Commission of the European Policy and International Cooperation of the Association of Polish Cities. Since 2012 he is co-chairman of the Functional Metropolitan and Urban Areas Team of the Joint Commission of Government and Local Government.