| 1943 | Born in | 
| 1953 | His family emigrates and lives in Southern California | 
| 1956 | Lives in Dordrecht for six months, and returns to America | 
| 1962 | Moves to Zwijndrecht, on the riverside across from Dordrecht | 
| 1963 | Back to Long Beach California and Studies art (ceramics) and Language (Russian) at California State University at Long Beach | 
| 1965 | Meets the Dutch environmental sculptor Joop Beljon during a sculpture symposium on the campus in Long Beach. Returns to Holland at the end of the year | 
| 1966 | Studies for a teaching degree in art at the Tilburg School of Art | 
| 1967 | Makes first work composed of different units, calculating their proportions to have the same volume | 
| 1968 | Receives his first commission for a large bronze work, discoid form | 
| 1969 | Graduates and enters the last year of sculpture class at the Rotterdam Art Academy | 
| 1969 | First one man exhibition of sculpture in the office of Dicke Architects in Dordrecht | 
| 1969 | Teaches at a secondary school in Zwijndrecht for two years | 
| 1969 | Receives his first commission for an environmental land art project, garden and fountain, for the DSW plant in Dordrecht | 
| 1970 | Graduates and receives the Rotterdam Art Foundation Threshold Prize | 
| 1970 | Meets Henry Moore and his wife Irina for the first time in Forte Dei Marmi, Italy | 
| 1971 | Start of membership of various organizations and government committees | 
| 1971 | Visits Irina and | 
| 1972 | became a member of the | 
| 1972 | First work, perpendicular cylinders 2, in which he uses a transitional stage as the final work | 
| 1972 | Makes lines on the surface of curved glass planes in order to create spatial linear forms | 
| 1973 | Receives a grant from the Arie Scheffer Foundation | 
| 1973 | Works in Plexiglas with Vera Röhm in Darmstadt, Germany | 
| 1974 | Works in marble in Querceta, Italy, at Henraux, where he is introduced by Henry Moore | 
| 1976 | Makes first works without a closed interior, having open curved planes, called the planes, junction series | 
| 1977 | Is professor of sculpture at the Rietveld Art Academy in Amsterdam for two years | 
| 1978 | Participates in the Tenth Sculpture Conference in Toronto, Canada | 
| 1979 | Secretary of the Dutch Sculptors' Association for five years | 
| 1979 | Marries Lidwien Kuster | 
| 1981 | Professor of sculpture at the | 
| 1981 | Meets the glass artist Andries Copier in Delft | 
| 1981 | Member an later chairman of the Stipend Committee for Artists and Architects of the Dutch Ministry of Culture for three years | 
| 1982 | Designs and builds his studio after four years of preparation | 
| 1982 | Together with Jan Jelle Stroosma he visits Truus | 
| 1983 | Corresponds with Charles Biederman | 
| 1983 | Joost Baljeu visits his studio for the first time | 
| 1983 | Chairman of the East West Forum, a sculpture symposium with Japanese and Dutch artists participating in Dordrecht, The Netherlands | 
| 1983 | Meets Queen Beatrix formally at the opening of the East West Forum in Dordrecht Holland | 
| 1984 | President of the Dutch Sculptors' Association for two years | 
| 1984 | rijksgecommiteerde (second examiner) Royal Art Academy of Art, The Hague NL | 
| 1984 | Designs a bridge in Dirksland, Holland | 
| 1985 | member (treasurer) of the board of the Janjelle Stroosma Stichting (Foundation) Dordrecht NL | 
| 1985 | Travels to Medellin, Colombia to meet and pick up the two adopted daughters Carmen and Julia | 
| 1986 | Princess Juliana unveils his Durrer monument, primum movens ultimum moriens in Amsterdam. Meets the Princess and Prince Bernhard | 
| 1986 | First meeting with Donald Judd in Mönchengladbach; a year later in Eindhoven | 
| 1987 | Start of yearly work in Finish Lapland, above the polar circle, working in wood again | 
| 1987 | Corresponds with and visits Annie Oud, the widow of J.J. P. Oud, several years until her death | 
| 1988 | Together with Wim Smits he visits | 
| 1989 | Meets with Charles Biederman, in the car driving from a conference in Vlissingen to Dordrecht Holland | 
| 1990 | Divorces | 
| 1990 | Constructs his stainless steel work | 
| 1990 | Executes photographic light sculpture aurora borealis on the Pyhö Tunturi in Finland | 
| 1990 | Six Dutch sculptors: van Bennekum, Glandorf, Goerres, van Loo, Schole and Wubben write a letter to Kemijärvi attempting to discredit him, purportedly as board members of Dutch Sculptors' Association. A year later the problem was resolved with the board itself | 
| 1992 | Marries Marjo Heikkinen, in Kemijärvi | 
| 1992 | Is secretary of the Dutch Sculptors' Association | 
| 1992 | Birth of Oskar in Turku Finland | 
| 1993 | Birth of Vincent in Zwijndrecht Holland | 
| 1993 | Takes the initiative to develop a sculpture park along the river banks near Zwijndrecht | 
| 1994 | Participates in a panel discussion Konkrete Kunst und öffentlicher Raum, Haus Dacheröden in Erfurt | 
| 1994 | Is asked to submit a design for a park on the Suvantoranta in Kajaani, Finland | 
| 1994 | Conducts a workshop ORANJE LANDSCHAP on landscape design, studying the river Wien in Vienna Austria | 
| 1995 | the | 
| 1996 | Realizes the | 
| 1996 | Birth of Vera in Zwijndrecht, Holland | 
| 1997 | Visits Bulgaria in preparations of an exchange between Bulgarian and Dutch art | 
| 1997 | organizes the first biennial in the sculpture park Outside In, Finnish Contemporary art | 
| 1997 | develops his own domain on internet | 
| 1998 | coordinates an exchange between Dutch and Bulgarian artists – SEA North Sea Black Sea; the first | 
| 1999 | coordinates the second exhibition, SEA (Black Sea North Sea), which is preceded by a symposium in the Open Air Museum OPAM which is opened by His Majesty King Simeon II of Bulgaria and Her Majesty Queen Beatrix of the Netherlands | 
| 1999 | receives the Bulgarian decoration in the 1st class Order of The Knight of Madara | 
| 1999 | |
| 2000 | leaves the Dutch Sculptors' Association | 
| 2000 | 
    Victory | 
| 2000 | participates in | 
| 2000 | lecture – | 
| 2003 | moves with his family permanently to | 
| 2003 | second prize – MUOTIALA, Tampere, environmental art competition | 
| 2004 | accepted as a member of the | 
| 2005 | cultural ambassador for | 
| 2006 | |
| 2006 | permanently installs his large works on the grounds of Penttilä in Kangasniemi Finland – establishes | 
| 2006 | travels to Denver USA on invitation by the city and county of Denver to make a proposal for the Justice Center Campus | 
| 2006 | travels to California and visits the | 
| 2007 | works on his personal sculpture park and improves the grounds at Penttilä | 
| Lives and works in Kangasniemi and Kemijärvi, Finland and Zwijndrecht, Holland |