In 1905 Lachman left school and went into commercial art work in Chicago, where he met an unidentified former student of Howard Pyle who advised him to go to Wilmington to seek Pyle's advice, which Lachman did in the fall of 1905. In Wilmington Lachman took one of the 804 Orange Street studios and met Oliver Kemp there. Kemp was a great help to Lachman, offering him criticism and suggestions.

Between 1906 and 1910 Lachman produced a considerable number of illustrations, but between 1910 and 1913 he seems to have abandoned illustration for photography, becoming a photographer of children in Chicago. About 1913 he went to France, where his stay was supported by Morris Rosenwald, the president of Sears, Roebuck and Co. In France he became the friend of such artists as Pierre Bonnard and Claude Monet and was quite successful as a landscape artist of the Post Impressionist school, his paintings being bought by the city of Paris for its public collections as well as by the Prado in Madrid and the Chicago Art Institute in this country. In 1922 he was made a Chevalier of the Legion of Honor of France.

In 1927 Lachman developed an interest in motion pictures and became a v4ry well known and successful director and producer, working in France, E and, and Hollywood. Among the thirty three films he directed was Baby, Take A Bow, which elevated Shirley Temple to stardom. In 1955 Lachman retired from film making and went into business, opening the Patio Shop in Beverly Hills, where he made art and decorative objects from junk. In 1957 he began painting again and exhibited his work at the Dalzell Hatfield Gallery in Los Angeles and the Hammer Galleries in New York. He died March 20, 1975.
Lachman's style, during the few years he practiced illustration, was not particularly distinguished, except perhaps by a flair for the dramatic.

Pyle Students