According to a statement released by the party on Tuesday morning, Schlingmann plans to start his own operation "focusing on organizations and companies in transition".
"The last nine years I've had extremely exciting and important roles within the Moderates," Schlingmann wrote in a post on his Facebook page.
"It's time for me to move on to new challenges."
Schlingmann, 42, served previously as the party secretary for MUF, the Moderates' youth wing, as well as the Moderate Party's head of communications.
He became Moderate party secretary in September 2006, taking over from Sven Otto Littorin, who went on to become the employment minister in the first Alliance government.
Schlingmann is credited with coining the term “New Moderates”, which was meant to capture the party's shift to the centre ahead of the 2006 election campaign.
He also came up with the slogan “The only workers' party”, which the Moderates employed during their 2010 election campaign to reference what the party had previously termed “pro-employment policies”, much to the frustration of the Moderates' rivals on the left.
Shortly after the 2010 election, Schlingmann stepped down as party secretary on October 1st and was replaced by Sofia Arkelsten.
He then served as state secretary to Prime Minister Fredrik Reinfeldt, taking the lead on communication matters in the prime minister's office, before moving back into strictly party politics as the Moderates' chief strategist.
Schlingmann's last day of employment with the Moderates will be Feburary 28th, 2013.