Worked as a legal adviser for Umma Bank in Libya, from 1979 to 1982.
Worked as Teacher at the Diplomatic Institute of the Ministry of Foreign Relations "International Organizations subject", from 1989 to 1991.
Worked as a lecturer at Faculty of Law "Contracts subject", University of Tripoli.
Worked as a lecturer at the Academy of Graduate Studies "Contracts subject", Tripoli, Libya, from 1994 to 2009.
Member of the committee that drafted the Investment Law No. 9 of 2010. - Worked for the Committee of international treaties at the Ministry of foreign affairs.
Worked for the World Trade Organization delegation at the Ministry of Economy. - Established Zahaf & Partners Law Firm in 1990.
Carried out the legal work related to the privatization of Sahara Bank.
Carried out the legal work related to the privatization of Wehda Bank.
Carried out the legal work related to the participation of the Portuguese Bank (Banco Espirito Santos) and Aman Bank.
Carried out the legal work related to the participation made between Libya and Emirates "First Gulf Libyan Bank".
A brief about some of the companies and personalities that has been represented by Dr. Saleh before all the Libyan courts during the previous period:
Libyan Foreign Bank.
Man-Made River body and its dispute regarding the dissolution of the Korean company
Several Swiss companies and Swiss detainees who were arrested in Libya, due to a dispute happened between the former regime and the Swiss government.
Several foreign companies that operate in Libya.