Daniel Otis Teasley entered the ministry of the Church of God denomination in 1896, and pastored inNew York. Sometime after 1910, he became General Manager of the Gospel Trumpet Company, where he worked until 1917. He then worked as general manager of Warner Press (1917-18). His works include:
Historical Geography of the Bible, 1898, 1917
The Holy Spirit and Other Spirits, 1904
How to Conduct a Sunday School, 1911
The Gospel Guide-book, 1918
The Bible and How to Interpret It, 1918