Kivijärvi's most famous works, such as the monument to the memory of president Paasikivi, consist of non-representational forms, sculpted from black stone, whose carefully worked surfaces alternate between smoothly polished areas and sections that have been left rough.
[3] Kivijärvi started his career in art as a painter.
[4] The first non-figurative sculpture was monument to Uno Cygnaeus in Hämeenlinna in middle of 1960s.
During his career Kivijärvi made many public memorials and monuments.
[5] His works include Church builders Killi and Nalli in Raisio.