Initially, Aziz joined the corporate branch of Citibank Pakistan as its credit officer in 1969.
During his career, Aziz subsequently served in various countries including Pakistan, Greece, United States, United Kingdom, Malaysia, Philippines, Jordan, Saudi Arabia and Singapore.
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After arriving to assume the charge of corporate assignment in the United States, Aziz settled in New York City and took over the office operations of Citibank at the Empire State Building.
Aziz acquired permanent residence status, but did not acquire American citizenship, whilst continuing to upgrade his legal status.

In the U.S., Aziz held numerous positions in Citibank across several divisions including Corporate and Investment Banking (CIB), Corporate Planning Officer (CPO), Chief Financial Officer of Citicorp and Managing Director of Citibank Singapore.
He has been a board member of Citibank subsidiaries, including Saudi American Bank, Citicorp Islamic Bank, and of several non-profit organizations.
Aziz played a pivotal rôle in expanding Citibank branches and corporate directive operations throughout the country and was instrumental in bringing multinational banking industries into Pakistan in the 1990s.

At Citibank, Aziz served as the corporate director of Asia Pacific global finance operations and had been notable for financing and managing funds on behalf of Citibank and other financial corporations in global stock markets.
He was also involved with Citi Private Bank, a subsidiary of Citigroup.
Aziz regarded his career in Citigroup as "extremely helpful" in preparing him for the executive public office, in 2006.

Aziz continued to visit Pakistan, working to expand Citibank's financial services and banking, overseeing the wide expansion of Citigroup's branches and its influence in Pakistan.
In the 1990s, he worked closely with the governments of Benazir Bhutto and Nawaz Sharif to help negotiate economic relief packages and aid to Pakistan, while maintaining diverse relations with Pakistan's Armed Forces who would also visit the United States as part of Sharif's and Benazir Bhutto's state visits.

By the 1990s, Aziz had established many notable contacts within the United States administration.
In a book, Global Financial Warrior, written by John B. Taylor, Aziz had substantial access to the US Treasury, World Bank and many other world financial institutions.
Aziz worked closely with the United States in order to finance U.S. war games and operations.
Aziz knew the volumes of secretive methods of transferring funds in and out of South Asia, particularly clandestine financing of nuclear weapons programmes of India and Pakistan at its most, Taylor maintained.
Initially, Aziz joined the corporate branch of Citibank Pakistan as its credit officer in 1969. During his career, Aziz subsequently served in various countries including Pakistan, Greece, United States, United Kingdom, Malaysia, Philippines, Jordan, Saudi Arabia and Singapore. =
After arriving to assume the charge of corporate assignment in the United States, Aziz settled in New York City and took over the office operations of Citibank at the Empire State Building. Aziz acquired permanent residence status, but did not acquire American citizenship, whilst continuing to upgrade his legal status.
In the U.S., Aziz held numerous positions in Citibank across several divisions including Corporate and Investment Banking (CIB), Corporate Planning Officer (CPO), Chief Financial Officer of Citicorp and Managing Director of Citibank Singapore. He has been a board member of Citibank subsidiaries, including Saudi American Bank, Citicorp Islamic Bank, and of several non-profit organizations. Aziz played a pivotal rôle in expanding Citibank branches and corporate directive operations throughout the country and was instrumental in bringing multinational banking industries into Pakistan in the 1990s.
At Citibank, Aziz served as the corporate director of Asia Pacific global finance operations and had been notable for financing and managing funds on behalf of Citibank and other financial corporations in global stock markets. He was also involved with Citi Private Bank, a subsidiary of Citigroup. Aziz regarded his career in Citigroup as "extremely helpful" in preparing him for the executive public office, in 2006.
Aziz continued to visit Pakistan, working to expand Citibank's financial services and banking, overseeing the wide expansion of Citigroup's branches and its influence in Pakistan. In the 1990s, he worked closely with the governments of Benazir Bhutto and Nawaz Sharif to help negotiate economic relief packages and aid to Pakistan, while maintaining diverse relations with Pakistan's Armed Forces who would also visit the United States as part of Sharif's and Benazir Bhutto's state visits.
By the 1990s, Aziz had established many notable contacts within the United States administration. In a book, Global Financial Warrior, written by John B. Taylor, Aziz had substantial access to the US Treasury, World Bank and many other world financial institutions. Aziz worked closely with the United States in order to finance U.S. war games and operations. Aziz knew the volumes of secretive methods of transferring funds in and out of South Asia, particularly clandestine financing of nuclear weapons programmes of India and Pakistan at its most, Taylor maintained.
Shaukat Aziz