From 1972 until the end of the Eritrean War of Independence in 1991, he served as Chief Strategist and the head of Military Intelligence (Brigade 72) of the EPLF.

He is also credited with having been the commander of the Nakfa, Kerkebet and Zara fronts during the Red Star Campaign in the early 1980s.

In its June 16, 1991 publication, The New York Times stated that after the fall of Asmara, "Petros Solomon, was running the city until the arrival of Isaias Afewerki".

[5] During his time as a Minister of Marine Resources, "he independently conceived of a biosaline agriculture as a way of building the economy of the country and gave enthusiastic support to Manzanar Project".

[6] In September 2001 he was detained indefinitely along with other politicians who were known as the G-15, a group which opposes the rule of Eritrean president Isaias Afewerki.

[2] His wife Aster Yohannes, who was also a freedom fighter and member of EPLF, was detained by security personnel at Asmara International Airport in the capital Asmara on December 11, 2003, when she returned after a three-year period of study at the University of Phoenix to unite with her children.