Early work included serving as city attorney for Higbee, Missouri, in 1904 and 1905, then judge of the Macon County probate court from 1907 to 1915.

Congressman Romjue returned to private practice for the next two years until being elected to the Sixty-eighth and to the nine succeeding Congresses (March 4, 1923 – January 3, 1943).

While serving as a delegate to the 1928 Democratic National Convention, Congressman Romjue became friends with future President Franklin D. Roosevelt, and could always be counted on as a strong supporter of FDR's New Deal legislation in the 1930s—especially Social Security, help for farmers, and wounded military veterans.

The congressman also worked closely with other Missouri politicians to secure for the state military bases like Fort Leonard Wood and Camp Crowder as America geared up for World War II.

Failing to win re-election in 1942 to the Seventy-eighth Congress, Romjue returned to Macon County where he resumed the practice of law and also engaged in farming and livestock production.