1863 - Lieutenant in the ship HMS Royal Oak, an armoured frigate commanded by Frederick Archibald Campbell, serving briefly with the Channel squadron, then in the Mediterranean. 
1866 - Lieutenant in HMS Terrible commanded by Captain John Commerell 
1867 - Flag lieutenant to Rear-Admiral Frederick Warden who was posted Commander-in-Chief, Channel Squadron in 1867 and Commander-in-chief, of the Coast of Ireland Station at Queenstown (Cobh, county Cork, Ireland) in December 1868 
1874 - Commander in HMS Dwarf in China until paid off at Portsmouth in 1877 
from the Times 10th January 1877
The Dwarf, 4, double screw composite gun-vessel, Commander the Hon. Edward S. Dawson, was paid off at Portsmouth on Tuesday morning by the Hon. W.C. Carpenter of the Duke of Wellington, and will be placed in the third division of the Steam Reserve. The Dwarf left for China in April, 1868, and was recommissioned at Hongkong on the 18th of July, 1871, by Commander B.W. Bax. In June, 1873, she preceded to Japan, accompanied Vice-Admiral Shadwell in a cruise to Russian Siberia during July, Angus, September of the same year, and convoyed the Commander-in-Chief to Nichlooesk River, Amur. In May and June, 1874, she was employed in observing the movements in the south of Formosa, where a large force of Japanese had landed for the purpose of punishing the savages for murdering the crews of several junks who had been wrecked on the coast. She was next despatched to the Yangtze river, to report on the damage done to salt junks by steamers passing Deer Island. She received her new crew in December, and in the following October she was employed to watch British interests during the excitement produced by the murder of Mr. Margary. After being engaged from November, 1875, to June, 1876, in determining various meridian distances, she left Yokohama on the 30th of June for England, visiting the ports of Hodeidah and Jeddah, in the Red Sea, where she found everything quiet. On the 26th of September, 1876, she fell in with a Nova Scotian bark, the Uamvar, dismasted and perfectly helpless, which she sank, after taking the crew on board, as it was an obstruction to navigation. Commander Dawson succeeded Commander Bax in December, 1874, and during the six years' commission only two deaths occurred, both from drowning.
At the death of his brother, Vesey Dawson, Edward Stanley Dawson succeed to the title. 
Capt Hon Edward Stanley Dawson R.N. was appointed High Sheriff of co. Monaghan, Ireland in 1899
Edward Stanley Dawson passed away on October 24th 1919 and was buried at Bray, in Windsor and Maidenhead Royal Borough, Berkshire, England. His memorial reads "To the memory of Captain the Honourable Edward Stanley Dawson born August 16th 1843 died at Canon Hill, Braywick October 24th 1919. and his wife Elizabeth Selina Georgina Dawson born July 30th 1869 died October 13th 1924."