Who are the leaders of the Jehovah's Witnesses church? I assume the Jehovah's Witnesses church has structure and organization for its membership.

Who are the leaders of the Jehovah's Witnesses, and what is their role? From whom do members receive guidance and counsel?
The head of the Jehovah's Witness Church is known as the Watchtower Society.

Sorry for using Wikipedia as a reference, but apparently the JW website doesn't give out much information on them.

On the official Jehovah's Witnesses website, we can get the following information:

http://www.jw.org/en/jehovahs-witnesses/faq/congregations-organized/


  How Are Your Congregations Organized?
  
  A body of elders supervises each congregation. About 20 congregations
  form a circuit, and about 10 circuits are grouped into a district.
  Congregations receive periodic visits from traveling elders, known as
  circuit overseers and district overseers.
  
  Bible-based guidance and instructions are provided by a Governing Body
  made up of longtime Witnesses who currently work at the international
  offices of Jehovah’s Witnesses in Brooklyn, New York.—Acts 15:23-29; 1
  Timothy 3:1-7.


The information about the founder also helps to understand the organizational structure:


  The modern-day organization of Jehovah’s Witnesses began at the end of
  the 19th century. At that time, a small group of Bible students who
  lived near Pittsburgh, Pennsylvania, in the United States, began a
  systematic analysis of the Bible. They compared the doctrines taught
  by the churches with what the Bible really teaches. They began
  publishing what they learned in books, newspapers, and the journal
  that is now called The Watchtower—Announcing Jehovah’s Kingdom.
  
  Among that group of sincere Bible students was a man named Charles
  Taze Russell. While Russell took the lead in the Bible education work
  at that time and was the first editor of The Watchtower, he was not
  the founder of a new religion. The goal of Russell and the other Bible
  Students, as the group was then known, was to promote the teachings of
  Jesus Christ and to follow the practices of the first-century
  Christian congregation. Since Jesus is the Founder of Christianity, we
  view him as the founder of our organization.—Colossians 1:18-20.


Russell founded the Watchtower Society, which is the head of the Jehovah's Witnesses Church.

It is very difficult to get official information about the governing body from sources within the organization, but if you trust Wikipedia as a source, they do have more information: http://en.wikipedia.org/wiki/Governing_Body_of_Jehovah%27s_Witnesses#Committees (and in this case, Wikipedia does seem to have plenty of footnotes and supporting links.)

Among other detailed information, it lists the current and past governing members, how the members have been selected, etc.  As a sample, here's what it's got listed for current members:

Governing Body members


  Jehovah's Witnesses began capitalizing Governing Body as a proper noun
  in 1971; The Watchtower that year announced "The present Governing
  Body comprises eleven anointed witnesses of Jehovah."[82] The original
  members of the 1971 Governing Body, all now deceased, are indicated in
  italics in the lists below.[83] Current
  
  As of September 2012, the following people are members of the
  Governing Body of Jehovah's Witnesses[7] (year appointed in
  parentheses):
  
  
  Samuel Herd (1999)[84]
  Geoffrey Jackson (2005)[85]
  M. Stephen Lett (1999)[84]
  Gerrit Lösch (1994)[86]
  Anthony Morris (2005)[85]
  Guy H. Pierce (1999)[84]
  Mark Sanderson (2012)[87]
  David H. Splane (1999)[84]