[9] In June 2011, Blümel was entrusted with the tasks of "Council of Ministers coordination and government work" in the cabinet of then-Vice Chancellor Spindelegger.

[11] After leader Michael Spindelegger's resignation in September 2014, Blümel was confirmed as General Secretary by new chairman-designate Reinhold Mitterlehner at the meeting of the federal party executive.

He also sought to loosen restrictions on Österreichischer Rundfunk, the public broadcaster, and encourage more high-quality domestically-produced media in Austria.

[13] He also called for an ancillary copyright to protect journalistic content and intellectual property on the internet; to this end, he prioritized a European solution over a national one.

[15] On 12 October 2015, Blümel was appointed to succeed Manfred Juraczka, who resigned as regional party chairman of the Vienna ÖVP on the evening of the election.

Blümel served as non-executive city councillor in the Häupl VI cabinet; Markus Wölbitsch succeeded him in this position on 25 January 2018.

[18] Blümel was one of the ÖVP's five-member steering committee for government formation after the 2017 federal election, alongside leader Sebastian Kurz, Elisabeth Köstinger, Stefan Steiner, and Bettina Glatz-Kremsner.

In this capacity, Blümel was a proponent of the upload filters provided for in Draft Article 13 of the European Union copyright reform.

The public prosecutor's office suspected that Blümel and Austrian gambling company Novomatic might be involved in bribery.