An avid cyclist, Adler would travel to the countryside of France, Italy, and England to visit country houses and collect picture postcards.
[2] After returning to the United States in 1911, he began working as an architect for Howard Van Doren Shaw in Chicago, Illinois.
Together, the pair secured commissions for country estates for William E. Clow, Jr., Ralph Poole, Benjamin Nields, Morris E. Berney, David B. Jones, and Charles B.
Aspiring architect Paul Schweikher, who would go on to have a significant residential practice of his own, studied under Adler for a year starting in 1923.
In 1928, with thirty commissions to his name and support from fellow architects, the state examining board presented Adler with an honorary license.
[2] Also that year, Adler met with Jerrod Loebl and John A. Holabird, who were commissioned by the Armour Institute of Technology to find a new head of architecture for the school.
However, at Technische Universität München, Adler identified his beliefs as Episcopalian; this may have been due to the discrimination facing Jews at the time.
Adler's father was cremated—a funeral rite that was not sanctioned by the Jewish religion—and interred at a non-denominational cemetery owned by the Episcopal Church.
His mother was also buried in a non-denominational cemetery, indicating that his parents may have similarly downplayed their Jewish faith or converted entirely.