Complex sentence: After a brief career in farming, he became a bank examiner and an officer of the First National Bank of Levelland and the president and chief operating officer of the Citizens Bank of Slaton, Plains State Bank in Plains and South Plains Bank in Levelland.
Split into simpler sentences: After a brief career in farming, he became a bank examiner. Thereafter, he was an officer of the First National Bank of Levelland and the president and chief operating officer of the Citizens Bank of Slaton, Plains State Bank in Plains and South Plains Bank in Levelland.