Aug 31, 2009. /Lesprom Network/. Kemira Oyj's CFO Jyrki Mäki-Kala has been appointed new Deputy CEO as of September 1, 2009 as the current Deputy CEO Esa Tirkkonen will retire, the company reported. Esa Tirkkonen has been the Deputy CEO since 2000 and employed by the company since 1974. Kemira operates in water and fiber management chemistry. In 2008, the company recorded revenue of approximately Eur 2.8 billion and had a staff of 9,400. Kemira operates in 40 countries.