Born in March 1862 in Dartmouth, Nova Scotia, Newlands was called to the Nova Scotia Bar in 1883, after which he would go on to have an important role in the domain of law. That same year, he moved to Western Canada, residing briefly in Winnipeg.
On February 5, 1904, he was named a Justice of the Supreme Court of the Northwest Territories, and continued to hold on to the job following the creation of the province of Saskatchewan in 1905.
On March 2, 1918, Newlands was named a Judge of the Saskatchewan Court of Appeal. Three years later, Newlands was appointed Lieutenant-Governor of Saskatchewan and would remain in office for a decade.