He completed his PhD degree in 1999 with his thesis, "Portfolio Management and Investment Funds: Economic and Statistical Analysis of US examples".

He attended specialized financial market courses at US universities (in 1994, 1998 and 2002) and the Swiss National Bank (in 2001).

[citation needed] Šoškić is a Fulbright alumnus and member of the Presidency of the Scientific Association of Economists in Serbia.

He served as a special financial markets adviser in the National Bank of Yugoslavia (2000–02), economic policy adviser in the EU Policy and Legal Advice Center (2002–03), and was a member of the Council of the National Bank of Serbia (2003–04) and its chairman until 28 July 2010.

[citation needed] He authored the book Securities: Portfolio Management and Investment Funds, and co-authored Financial Markets and Institutions, Economic Statistics, and Stock Exchange Glossary.