1848 – was an apprentice for the lithographing and engraving firm of Sarony & Major
1853 – was a general manager, Sarony & Major
1854 – became a partner, Sarony & Major
1868 - the firm's name of his company was Major and Knapp, his business was the largest in its line in the country; was on the board of the directors of several insurance companies, including the Metropolitan
1871-1891 - was the second President of the Metropolitan Life Insurance Company; he was also a chairman of the finance committee, and the company's largest stockholder.