
Founded by H. Douglas Christiansen
Founded by H. Douglas Christiansen
Laboratory Division Founded
Headquarters open in La Grange, IL
Headquarters moves to Westchester
Engineering Division Founded
Sales/Marketing Division Founded
Chemical Engineering Division Founded
Employee Benefits Division Founded
Headquarters expands and moves to new Westchester office
Accounting/Finance Division Founded
Advertising (ad+one) Division Founded
Sycamore office opens
Supply Chain Division Founded
HR & Office Services Division Founded
Lake Geneva office opens
Environmental Health & Safety Division Founded