Investors interested in stocks from the Engineering - R and D Services sector have probably already heard of Sterling Infrastructure (STRL) and Aecom Technology (ACM) . But which of these two stocks offers value investors a better bang for their buck right now? We'll need to take a closer look. Everyone has their own methods for finding great value opportunities, but our model includes pairing an impressive grade in the Value category of our Style Scores system with a strong Zacks Rank. The Zacks Rank is a ...