Sentence:  Operating in 1887 was the `` Valley Telegraph Line '' , officers of which were E. C. Orvis , president ; H. K. Fowler , vice-president and secretary ; J. N. Hard , treasurer ; F. H. Walker , superintendent ; H. S. Walker , assistant <WSD>superintendent</WSD> . 
Meaning of the word marked with <WSD> tags:  a person who directs and manages an organization