Mr. Decker was educated in his native county, principally at Macopin, and for fifteen years lived in Newark, Essex County. In 1884 he moved to East Newark, Hudson County, where he still resides. Early in life he learned the mason's trade, which he followed with marked success for eight years. At the end of that period (1882) he engaged in the chemical charcoal business, and in 1897 formed a stock company, of which he is now (1900) President. This company supplies charcoal for Newark and vicinity, and maintains the largest business in that line in Eastern New Jersey.

An ardent and consistent Republican, Mr. Decker has earnestly advocated Republican principles ever since he cast his first vote. He is a public spirited, progressive, and enterprising citizen, prominent in party and business affairs, active and influential in promoting every worthy object, and thoroughly identified with the growth and prosperity of the community. His success in business has been the result of his own energy and ability. He is a member of the Knights and Ladies of the Golden Star, of the Order of Heptasophs, and of other organizations.