Eight years ago, Joe Karthein didn’t have the foggiest idea how a septic system worked. Now, he not only installs them, but he also designs them.
Karthein’s route to onsite system work was, as he says, convoluted. Several experiences led him to the industry, but since starting Sentinel Excavating in 2014, he has found success even through extremely difficult times.
“Back in my early 20s I went through a small business training program,” he says. “That was so pivotal in me starting my first company.” That company was an organic sauerkraut business, which Karthein owned and operated for seven years before selling
