[2][3][4] He immigrated to the United States first to Memphis, Tennessee, then followed the California gold rush west across the Isthmus of Panama to the Pacific coast.

[4] Kremer along with fellow Jewish immigrants Harris Newmark, Solomon Lazard, Jacob Baruch, and Herman Haas who, like Kremer, founded large wholesale enterprises in Bell's Row, at that time considered the best business location in the city,[2] and Isaias W. Hellman (who founded Los Angeles' first bank), used their proceeds to purchase and develop housing.

[7] They also founded the city's first synagogue, its first fraternal organization, and in 1854, the Hebrew Benevolent Society.

[4] His wife served as a founder of the Ladies Benevolent Society of Los Angeles.

[4] The Kremers were founding members of Congregation B'nai B'rith (now Wilshire Boulevard Temple).