He has also released music as a solo artist using various monikers, as Aerial M, M, and most notably, Papa M. Among his many 7" and splits with various bands, he has released (as Aerial M) 1997's Aerial M, and (as Papa M) 1999's Live from a Shark Cage, 2001's Whatever, Mortal, and 2003's Hole of Burning Alms.
In February and March 2005 he joined his old bandmates from Slint, Britt Walford and Brian McMahan, for a reunion tour, and in April released his first solo album not bearing a pseudonym, simply entitled Pajo. The follow-up to Pajo, entitled 1968, was released in August 2006.
He was confirmed to perform as Papa M at the ATP New York 2010 music festival in Monticello, New York in September 2010. In June 2010 it was announced that he would be joining the band Interpol as a tour member. He left the tour early on February 27, 2011.
On 12 February 2015, Pajo attempted suicide after posting a lengthy suicide note on his personal blog. He survived this attempt after EMS members were able to rescue him.