At the age of 15, in 1892 Lawrie worked as an assistant to many of the sculptors in Chicago, for their part in constructing the "White City" for the World's Columbian Exposition of 1893. Following the completion of that work, Lawrie went East, where he became an assistant to William Ordway Partridge. During the next decade, he worked with other established sculptors: Augustus Saint-Gaudens, Philip Martiny, Alexander Phimister Proctor, John William Kitson and others. His work at the Louisiana Purchase Exposition, St Louis, 1904, under Karl Bitter, the foremost architectural sculptor of the time, allowed Lawrie to develop both his skills and his reputation as an architectural sculptor.