From 1957 to 1963 Lansdale worked for the Department of Defense in Washington, serving as Deputy Assistant Secretary for Special Operations, Staff Member of the President's Committee on Military Assistance, and Assistant Secretary of Defense for Special Operations. During the early 1960s he was chiefly involved in clandestine efforts to topple the government of Cuba, including proposals to assassinate Fidel Castro. Much of this work was under the aegis of "Operation Mongoose" which was the operational name for the CIA plan to topple Castro's government. According to Daniel Ellsberg, who was at one time a subordinate to Lansdale, Lansdale claimed that he was fired by President Kennedy's Defense Secretary Robert McNamara after he declined Kennedy's offer to play a role in the overthrow of the Diem regime. Three weeks later, on November 22, 1963, Lansdale was allegedly photographed in Dealey Plaza, Dallas, Texas,shortly after Kennedy was assassinated nearby.
The United States Department of Defense Joint Chiefs of Staff saw the project's ultimate objective to be to provide adequate justification for a US military intervention in Cuba. They requested that the Secretary of Defense assign them responsibility for the project, but the Attorney General Robert Kennedy retained effective control.
Over thirty different plans were considered under the Cuban Project, some of which were carried out. The plans varied in their efficacy and intention, from propagandistic purposes to effective disruption of the Cuban government and economy. These included the use of American Green Berets, destruction of Cuban sugar crops, and mining of harbors.
Operation Northwoods was a 1962 plan, which was signed by the Chairman of the Joint Chiefs of Staff and presented to Secretary of Defense Robert McNamara for approval, that intended to use false flag operations in order to justify intervention in Cuba. Among other things considered were real and simulated attacks which would be blamed on the Cuban government. These would have involved attacking, or reporting fake attacks on Cuban exiles, US military targets, Cuban civilian aircraft, and development of a terror campaign on US soil. 
The Cuban Project played a significant role in the events leading up to the Cuban Missile Crisis of 1962. The Cuban Project's six-phase schedule was presented by counter-insurgency specialist Air Force General Edward Lansdale on February 20, 1962; it was overseen by Attorney-General Robert Kennedy, and President John F. Kennedy was briefed on the operation guidelines on March 16, 1962. Lansdale outlined the coordinated program of political, psychological, military, sabotage, and intelligence operations as well as assassination attempts on key political leaders. Each passing month since his presentation, a different method was in place to destabilize the communist regime, including the publishing of views against Castro, armaments for militant opposition groups, the establishment of guerilla bases throughout the country and preparations for an October military intervention in Cuba. Many individual plans were reportedly devised by the CIA to assassinate Fidel Castro. Plans to discredit President Castro in the eyes of the Cuban public included contaminating his clothing with thallium salts that would make his trademark beard fall out and spraying a broadcasting studio with hallucinogens before a televised speech. Assassination plots included poisoning a box of Castro's favorite cigars with botulinus toxin and placing explosive seashells in his favorite diving spots
From Wiki http://en.wikipedia.org/wiki/Edward_Lansdale
This is all I could find on him.