As Index.hu noted Seszták had as much influence in the Kisvárda local government as parliamentary group leader János Lázár in the National Assembly.

[3] In February 2013, Varánusz blog revealed from public data of parliamentary, registry court and National Development Agency (NFÜ) documents that Seszták was simultaneously a member of the parliamentary subcommittees for Information Technology and Telecommunications and Procurement and Enterprise Regulatory and a member of the Supervisory Board of the Enternet Invest Ltd. in 2012, a company partially under Cypriot offshore control, when along with five companies controlled by as well as other Cypriot companies, registered under the same address, won 12.5 billion Hungarian forints (€45 million at the time) for the procurement of the National Development Agency for European funding for the Internet broadband in regions.

[4][9][10] Following the 2014 parliamentary election, Seszták was appointed Minister of National Development in Viktor Orbán's newly formed third cabinet, replacing Zsuzsanna Németh.

Seszták was one of the two KDNP members (albeit also Fidesz politician) of the government, along with Deputy Prime Minister and party leader Zsolt Semjén during the inauguration.

He appointed his state secretaries on 16 June 2014 (Administration: Gábor Czepek, National Wealth: Sára Hegmann-Nemes, Parliamentary Affairs: János Fónagy, Energy: András Aradszki, Climate Policy: Zsolt Szabó, Infrastructure: László Tasó).

[11] Few weeks after his appointment as minister, Index.hu revealed that Seszták involved as a lawyer in establishing hundreds of short-lived companies and limited partnerships with Russian and Ukrainian background between 2001 and 2003 in Kisvárda, most of them abolished leaving behind public debts.

Therefore left-wing liberal portal 444.hu compared this case to Puskás Akadémia FC's Pancho Arena which was built just meters away from Prime Minister Viktor Orbán's house in Felcsút.