Karić worked for the public water utility Beogrаdvode from 2008 to 2012, serving as advisor to the general director and head of flood defence for the City of Belgrade.
Karić said of the agreement, "We want to be a partner of the Democratic Party, which will lead Serbia on its European path.
[8] After entering parliament, Karić urged the Serbian government to create a separate environment ministry, noting that more than sixty per cent of the country's negotiations with the European Union (EU) related to agriculture and ecology.
Karić remained the nominal president of the party, although it was generally accepted that Tadić was its real leader.
[12] The restructured NDS–Zeleni party contested the 2014 election at the head of a broader coalition around Tadić's leadership.
[13] The NDS–Zeleni alliance was always intended as a short-term arrangement, and the parties separated again after the election (although there was initially some controversy as to how this would occur).
[14][15] The SNS won a majority victory in 2014 and afterward formed a new coalition government with the Socialists and other parties.
In announcing his decision, he said that Zeleni's "common value determinant" with the SPS was "the idea of social democracy and sustainable development.
[23] Karić's primary responsibility as state secretary was overseeing negotiations over Serbia's compliance with Chapter 27 (environment and climate change) in its accession process with the European Union.
[26] In November 2018, Karić said that his department had drafted a new law to ban the construction of small hydro power plants in protected areas.
[29] The SNS won a plurality victory and once again formed a coalition government with the Socialists; this time, Karić was not re-appointed as a state secretary but once again served as an assembly member in the SPS's parliamentary group.
In his fourth term, he was a member of the environmental protection committee, a deputy member of the agriculture committee and the European integration committee, and a member of Serbia's friendship groups with Angola, Austria, Denmark, Ethiopia, Germany, Greece, Liberia, Norway, the countries of Southeast Asia (Brunei Darussalam, Singapore, Thailand, and Timor-Leste), Sudan, Trinidad and Tobago, and Tunisia.