Exhibit No. 11 HARDING LAWSON ASSOCIATES GROUP, INC. Computation of Per Share Earnings (In thousands, except per share data) (Unaudited) Three Months Ended Six Months Ended November 30, November 30, 1997 1996 1997 1996 - ----------------------------------------------------------------------------------------------------------- PRIMARY Average shares outstanding 4,971 4,980 4,974 4,933 Net effect of dilutive stock options based on the treasury stock method 162 16 56 25 - ------------------------------------------------------------------------------------------------------------ TOTAL 5,133 4,996 5,030 4,958 ============================================================================================================ Net income $891 $750 $1,811 $976 ============================================================================================================ Net income per share $0.17 $0.15 $0.36 $0.20 ============================================================================================================