For the next 12 years, Weinberg worked as the official court reporter to the Supreme Bench of Baltimore City.
He was also in the pool of stenographer at the Democratic National Convention in Baltimore when President Woodrow Wilson was nominated.
In the 1930s he filed one of the earliest damages lawsuits against a labor union; he was a delegate to the 1932 Democratic National Convention held in Chicago in support of Governor Albert Ritchie of Maryland nomination.
In 1936 he successfully argued to the Supreme Court on behalf of Harry Marks Clothing Company in the case upholding the constitutionality of the National Labor Relation Act.
Also on Weinberg's list of public duties includes: radio personality to acquaint the public with recent changes in law; former president of the Baltimore Hebrew Congregation and Phoenix Club; and member of the board at Old Phoenix Hospital (now named Sinai Hospital).