Every American remembers the unity felt in the wake of the terrorist attacks on Sept. 11, 2001, and the catastrophic events of that day. Mark Ziegenfuss, founder of Ziegenfuss Drilling Inc. of Ringoes, New Jersey, experienced that feeling first-hand at Ground Zero in the months after.
ZDI, started in 1973, does commercial water wells, foundations work, mine and tunnel projects, mostly in the East Coast of the United States, but they’ve worked in areas as far-flung as Hawaii and Yemen. The contractor, now and in 2001, has a reputation for drilling through tough materials.