During 1924 he became involved in the reorganisation of the IRA, inspecting its southern divisions that summer and its northern units during 1925. First elected onto the IRA Executive at the November 1925 IRA General Army Convention, he became a full-time IRA activist. He was the editor and regular contributor to the newly established Irish republican weekly
newspaper,
An Phoblacht. During
1926 he was acting
IRA chief of staff in the absence of
Andrew Cooney, and in 1927, he was confirmed in that position and held it until May 1936. In the summer of 1925, the anti-treaty IRA had sent a delegation led by Pa Murray to the
Soviet Union for a personal meeting with
Joseph Stalin, in the hopes of gaining Soviet finance and weaponry assistance. A secret pact was agreed where the IRA would spy on the
United States and the
United Kingdom and pass information to
Red Army military intelligence (
GRU)
spymasters in
New York City and
London in return for £500 a month. Meanwhile, the IRA's main
spymaster in America "Mr. Jones", whom historians Tom Mahon and James J. Gillogly have identified as
Daniel "Sandow" O'Donovan, passed "reports of the
army’s
chemical weapons service, state-of-the-art gas masks, machine-gun and aeroplane engine specifications, and reports from the
navy,
air service and army" to the Soviet GRU. His policy as chief of staff was to allow individual members of the IRA to join left-wing groups, but not to let the IRA itself become attached to any
political party. He simultaneously feared undermining support for
Fianna Fáil and thus handing power back to Cumann na nGaedheal; but he was also apprehensive about the IRA being seen as attached to Fianna Fáil. In 1930, Twomey married Kathleen MacLaughlin of
Donegal and had two children in the early 1930s.
Saor Eire and Fianna Fáil Cumann na nGaedheal attempted to use
red scare tactics by linking
Fianna Fáil to the
IRA, and the IRA to
Stalinism. Twomey had the qualities and skills of diplomacy when dealing with the various factions of the Republican movement. In 1931 Twomey tried to quell different factions within the IRA (those seeking to establish a social programme vs those against it) by permitting IRA members to create
Saor Eire, a far-left political party. However, Saor Eire quickly found itself under attack from both Cumann na nGaedheal and by the
Catholic Church in Ireland for being a Pro-Soviet organisation, with the IRA painted as guilty by association. Simultaneously, the Cumann na nGaedhael government gave itself emergency powers and began arresting IRA members. Both Twomey and the IRA decided that in order to hold off Cumann na nGaedheal, they would need to rally around Fianna Fáil. On 18 June 1936 the Fianna Fáil government banned the IRA. The following day Twomey was tried and jailed for three years for membership of the newly proscribed organisation. Under the IRA constitution, his tenure as IRA chief of staff ended automatically upon his arrest. He was imprisoned in
Arbour Hill Prison and the
Curragh from 1936 to 1938. During his period of imprisonment his family depended heavily on money sent to them by
Joseph McGarrity of
Clan na Gael, a US-based IRA
fundraising organisation. On his release, Twomey became
adjutant general on
Seán Russell's
army council. He travelled to
Britain with IRA leader
Jack McNeela and inspected the IRA's units there that were planning the 1939-40 sabotage and bombing campaign - the
S-Plan. Twomey concluded that the IRA was in no position to launch a campaign and withdrew from IRA activity. In 1939 he opened a
newsagents and confectioners in Dublin's
O'Connell Street. ==Post IRA life==