Mordecai was one the first
Jewish Americans to choose the army as a career. Stanley L. Falk notes that Mordecai was "an active and outstanding participant in the development of American military technology." Falk also suggests that Mordecai's work was "valued for its accuracy, its precise and systematic nature, and its immediate usefulness. It was an example and an inspiration for every other worker in the same field, and Mordecai was respected by all of them for his technical contributions no less than he was loved for his fineness of character, integrity, warmth and gentle humor." According to
The Jewish Press, Mordecai is best known for "introducing scientific methods into the development of pre-Civil War military munitions that contributed to America's becoming a nineteenth century world power." His memory is entitled in a peculiar degree to the care of army historians, for his work was such as appeals to technical and professional men rather than to the multitude. His contributions came, not in the shape of a few large nuggets, but in a steady stream of gold dust sustained for many years and far outweighing the nuggets in the end. The value of his work consisted in its accuracy, its systematic character, and its immediate utility, and still more in the subtle, potent way in which the spirit of it pervaded almost insensibly the entire corps. Alexander Rose notes that ==Publications==