Thomas Andrews, Jr. was an Irish businessman and shipbuilder. He was managing director and head of the drafting department of the shipbuilding company Harland and Wolff in Belfast, Ireland. As the naval architect in charge of the plans for the ocean liner RMS Titanic, he was travelling on board that vessel during her maiden voyage when the ship hit an iceberg on 15 April 1912, and he died in the disaster.

https://en.wikipedia.org/wiki/Thomas_Andrews