SYDNEY, AUSTRALIA: Macmahon Holdings Limited (ASX: MAH) has signed a scheme implementation deed to acquire all ordinary shares of Decmil Group Limited (ASX: DCG) for $0.30 per share. This offer represents a substantial premium of 76.5% over Decmil’s most recent closing price and an 81.8% increase over the 30-day volume-weighted average price (VWAP). The acquisition…