Rear Admiral Gunnar Emil Grandin (10 July 1918 – 2 August 2004) was a Swedish Navy officer.

In his later career, Grandin played a crucial role in the development and procurement of naval equipment and systems for the Swedish Navy.

He helped transition Sweden from relying on foreign naval electronics to achieving self-sufficiency in this area.

This collaboration extended to other Nordic countries, especially Denmark and Norway, resulting in cost-sharing for various projects and more efficient production.

His career culminated in his promotion to rear admiral in 1970, where he oversaw the planning and procurement of ships and weapon systems for the Swedish Navy.

[3] In 1942, he held the rank of sub-lieutenant and served as a communication and submarine hunting officer on the destroyer HSwMS Nordenskjöld.

[2] As a commander, he served as the head of the Naval Staff's Planning Department from 1960 to 1966, where he, in collaboration with the Swedish National Defence Research Institute, introduced operational analysis as an important tool in the organization's activities.

[7] From 1967, Grandin served as the head of the Weapon Department of the Royal Swedish Naval Materiel Administration.

[9] On 1 October 1970, Grandin succeeded Major General Benkt Dahlberg [sv] as the head of the Naval Material Administration (later called the Main Navy Materiel Department) within the Swedish Defence Materiel Administration,[10] and he was promoted to rear admiral in the navy from the same date.

[11] Grandin now held the position of overseeing the planning and procurement of ships and weapon systems for the Swedish Navy.

He quickly established working relationships with his colleagues, primarily in Denmark and Norway – in the spirit of the Nordic Council.

[14] In July 1982 he became a member of the National Swedish Museums of Military History (Statens försvarshistoriska museer, SFHM).

[3] He took on the task of creating the Swedish Room at the Museo Storico Navale in Venice, Italy, which was inaugurated on 12 June 1984.