After Titanic, Boxhall was the Forth Officer on the Adriatic for a while. He was also a sub-lieutenant in the Royal Navy Reserve, and served on a battleship for a year before the start of World War I. After the start of the war, he remained aboard the HMS Commonwealth, and then went to Gibraltar to command a torpedeo ship.

After this, he returned to White Star, where he served until way after the merger in 1934 with Cunard. He was the first officer aboard Ausonia, Scythia, and Antonia. He was the only, of Titanic's Junior Officers, to serve at sea for a long time. He had to retire in 1940, because of ill health. In 1958, he was the technical advisor for the movie, A Night to Remember.

After his death, his ashes were scattered over the last known site of the Titanic's sinking.