We provided expert supervision over the construction of the VOMI Commerce office building in the center of Osijek. The project included the construction of a modern building with four above-ground floors, with special attention paid to the implementation of deep foundations due to the previously removed basement building on the site. One of the most technically demanding segments was the implementation of an underground passage (tunneling) under a busy city road in order to connect the building to the public water supply network, while ensuring the smooth flow of city traffic and the stability of the road and surrounding infrastructure during the works.