Bring the attribute of an element to parent - xslt

Question

I have a question regarding bringing an attribute of an element to its parent or even grandparent. My XML file is as below :
<Hierarchy>
<Board>
<Id>ABCDE</Id>
<ParentId></ParentId>
<General>
<Name>President</Name>
<Description>Top level of the Hierarchy</Description>
<Template>LEVEL1</Template>
<LineManager>VP</LineManager>
</General>
</Board>
<Board>
<Id>EFGHI</Id>
<ParentId>ABCDE</ParentId>
<General>
<Name>VP</Name>
<Description>Below the President</Description>
<Template>LEVEL2</Template>
<LineManager>Department_Heads</LineManager>
</General>
</Board>
<Board>
<Id>JKLMN</Id>
<ParentId>EFGHI</ParentId>
<General>
<Name>Department_Heads</Name>
<Description>Reports to the VP</Description>
<Template>LEVEL3</Template>
<LineManager>Supervisors</LineManager>
</General>
</Board>
<Board>
<Id>OPQRS</Id>
<ParentId>JKLMN</ParentId>
<General>
<Name>Supervisors</Name>
<Description>Reports to the Reports to Dep Heads</Description>
<Template>LEVEL4</Template>
<LineManager>Employees</LineManager>
</General>
</Board>
<Board>
<Id>TUVWX</Id>
<ParentId>OPQRS</ParentId>
<General>
<Name>Employees</Name>
<Description>Reports to the Reports to Dep Heads</Description>
<Template>LEVEL5</Template>
<LineManager></LineManager>
</General>
</Board>
</Hierarchy>
How do I bring the "LineManager" from all levels directly at "VP". So I need to skip the "Supervisor" and "Department_Heads", directly pick the "LineManager" from all level in the hierarchy and place it at VP as an element. The expected output is below :
<?xml version="1.0" encoding="UTF-8"?>
<Hierarchy>
<Board>
<Name>President</Name>
<Description>Top level of the Hierarchy</Description>
<LineManager>VP</LineManager>
<Board>
<Name>VP</Name>
<Description>Below the President</Description>
<LineManager>Department_Heads</LineManager>
<LineManager>Supervisors</LineManager>
<LineManager>Employees</LineManager>
</Board>
</Board>
</Hierarchy>
So here, all the "LineManager" element from all levels below VP is placed at VP.
I tried something and I will post it below :
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="msxsl">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="/">
<Hierarchy>
<xsl:for-each select="Hierarchy/Board">
<xsl:if test="General/Template='LEVEL1'">
<xsl:variable name="level1" select="Id"/>
<Board>
<Name><xsl:value-of select = "General/Name"/></Name>
<Description><xsl:value-of select = "General/Description"/></Description>
<LineManager><xsl:value-of select = "General/LineManager"/></LineManager>
<xsl:for-each select="//Board">
<xsl:if test="ParentId = $level1">
<xsl:if test="General/Template='LEVEL2'">
<xsl:variable name="level2" select="Id"/>
<Board>
<Name><xsl:value-of select = "General/Name"/></Name>
<Description><xsl:value-of select = "General/Description"/></Description>
<LineManager><xsl:value-of select = "General/LineManager"/></LineManager>
<xsl:for-each select="//Board">
<xsl:if test="ParentId = $level2">
<xsl:variable name="tagname1" select="General/LineManager"/>
<xsl:for-each select="General">
<xsl:if test="LineManager='Supervisors'">
<LineManager><xsl:value-of select="$tagname1"/></LineManager>
</xsl:if>
</xsl:for-each>
</xsl:if>
</xsl:for-each>
</Board>
</xsl:if>
</xsl:if>
</xsl:for-each>
</Board>
</xsl:if>
</xsl:for-each>
</Hierarchy>
</xsl:template>
</xsl:stylesheet>
The result of my test gives me only the element directly under VP which is the "Department_Heads". But I want all the "LineManager" elements from all levels to be placed at VP.
Please let me know if any further information is required.