In 1794, Robert also supervised the construction of the Pentland Skerries Lighthouse. From 1797-1843 Robert acted as engineer to the Northern Lighthouse Board. During this time he oversaw the construction of many lighthouses, the most famous of which was the Bell Rock Lighthouse.

Notably, Robert Stevenson invented intermittent and flashing lights. His invention earned him a gold medal from the King of Netherlands. Although most well-known for his lighthouses, Robert also engineered bridges, roads, and railways, among other things.