Founded by H. Douglas Christiansen
History
1973
Laboratory Division Founded
Headquarters open in La Grange, IL
1975
Headquarters moves to Westchester
1976
Engineering Division Founded
1978
Sales/Marketing Division Founded
1979
Chemical Engineering Division Founded
1981
Employee Benefits Division Founded
1986
Headquarters expands and moves to new Westchester office
1988
1996
Accounting/Finance Division Founded
1998
Advertising (ad+one) Division Founded
2007
Sycamore office opens
2013
Supply Chain Division Founded
2018
HR & Office Services Division Founded
2019
Lake Geneva office opens
2020
Environmental Health & Safety Division Founded