"Around 1920, he started a contracting business with his brother Ben." JHGB
After Tony's death, the Halsema Brothers contracting business was bought out by his long-time superintendent and "right hand man", Mr Carlson. The business continued to operate for many years as Carlson Construction Company.
He registered for the military draft in Sumter County, Florida - 1917-18. Vital Statistics Record We Passed this Way Vol.II Julle Halsema and Gesina Boerema