Lem worked as a ranger at Mount Rainier, Bryce Canyon, and Grand Canyon National Parks. It was at Bryce Canyon Lem started his experience as a Backcountry Ranger patrolling the canyons and plateaus of the wilderness, which honed him for later positions at Zion and Grand Canyon National Parks. During this time he started singing for folks from all over the world as the main attraction at Bryce Pioneer Village located in Tropic, Utah, and would perform at the famous Ruby's Inn. During this period Lem picked up the stage name of "Ranger Lem".
While at Zion National Park Ranger Lem patrolled the 40,000 acres of the Kolob Canyons backcountry. During this time Lem spent 14 to 20 miles a day in the saddle. With his horse Red, dubbed the "Mountain Cayuse" by the rangers, Lem fought wildfires, poachers, rounded up stray cattle, mended fence lines, conducted rescues and wrote music. In 2009 Lem was recognized as the "...last mounted ranger of Zion..." during the 100th anniversary for the founding of the park.
Lem filmed a commercial at the Grand Canyon for SL Ranch Publication. It was an experience he will never forget! "We spent three days filming the commercial just outside of the park along the south rim. The camera crew was great, and patient. It was long hours of singing the same songs over and over while different camera angles were shot. One morning we had to be up at 4:00 am to get a shot with a herd of elk in the background, while I rode my horse across the scenery. They even had me petting a pet buffalo. I'm ever thankful for the opportunity. Not many people get a chance to do something like this."
If Lem wasn't rangering then he was either singing or punching cattle. "The hardest and most rewarding job I ever did was working cows. The challenges of working in all kinds of weather, finding strays and keeping in time with your horse, that from time to time you were sure that the devil himself had made, along with the peacefulness and beauty is beyond compare." Lem worked the Binkerhoff Ranch out of Tropic Utah from 1989 to 1992. In 1992 he helped out Rancher John Sims of Cedar City Utah, and the Cedar City Long Horn cattle Company on their annual drives until he moved to Arizona in 1996.
In 1989 Lem was invited to perform at the Western Music Association's 10th annual convention at the Old Tuscon, AZ Movie Studies. In 1994 Lem recorded "This Town" which in 1995 was played on radio stations across the United States and broke the 10 ten on the independent music charts. His true life stories with standard and original cowboy songs bring an uplifting experience for young and old!