Alfred Alphonse Moeller de Laddersous (9 December 1889 – 20 January 1971) was a Belgian lawyer, colonial administrator and businessman.

He registered at the Mechelen Bar as a trainee, but soon decided to pursue a colonial career and was accepted by the territorial administration.

[1] Moeller succeeded Adolphe De Meulemeester as governor and deputy governor-general of Orientale Province, taking office on 9 October 1926.

[3] He was always passionately interest in African customs, and supported strengthening the indigenous political structures and customary courts.

[1] Moeller held office until 8 April 1933, when the provinces were reorganized and the era of the "great" provincial governors was over.

[2] From 5 February 1930 Moeller was a corresponding member of the Belgian Colonial Institute, now the Royal Academy for Overseas Sciences.

[1] In 1938 Moeller returned to the Congo to chair the first International Congress of African Tourism in Costermansville (Bukavu).

He sat on the boards of directors of the Compagnie du Congo pour le Commerce et l'Industrie (CCCI), Compagnie Cotonnière Congolaise (Cotonco), Compagnie du chemin de fer du Congo supérieur aux Grands Lacs africains (CFL), Auxiliaire Industrielle et Financière des Grands Lacs Africains (Auxilacs) and the gold mines of Kilo-Moto, Société Immobilière au Kivu (SIMAK), among others.

Due to the links he forged during the war with Firmin van Bree, in 1945 he was put in charge of diamond sales of Forminière.