diff --git a/Modules/VMware.vSphere.SsoAdmin/Group.ps1 b/Modules/VMware.vSphere.SsoAdmin/Group.ps1
index 2348a52..6f04d33 100644
--- a/Modules/VMware.vSphere.SsoAdmin/Group.ps1
+++ b/Modules/VMware.vSphere.SsoAdmin/Group.ps1
@@ -264,6 +264,7 @@ function Remove-SsoGroup {
     Twitter:       @dimitar_milov
     Github:        https://github.com/dmilov
     ===========================================================================
+
     .DESCRIPTION
     This function removes existing local group.
 
@@ -305,8 +306,302 @@ function Remove-SsoGroup {
     }
 }
 
-function Add-PrincipalToSsoGroup {
+function Add-GroupToSsoGroup {
+    <#
+    .NOTES
+    ===========================================================================
+    Created on:   	5/26/2021
+    Created by:   	Dimitar Milov
+    Twitter:       @dimitar_milov
+    Github:        https://github.com/dmilov
+    ===========================================================================
+
+
+    .SYNOPSIS
+    Adds a group to another group
+
+    .DESCRIPTION
+    Adds the specified group on $Group parameter to target group specified on $TargetGroup parameter
+
+    .PARAMETER Group
+    A Group instance to be added to the $TargetGroup
+
+    .PARAMETER TargetGroup
+    A target group to which the $Group will be added.
+
+    .EXAMPLE
+    $administratosGroup = Get-SsoGroup -Name 'Administrators' -Domain 'vsphere.local'
+    Get-SsoGroup -Name 'TestGroup' -Domain 'MyDomain' | Add-GroupToSsoGroup -TargetGroup $administratosGroup
+
+    Adds 'TestGroup' from 'MyDomain' domain to vsphere.local Administrators group.
+    #>
+    [CmdletBinding(ConfirmImpact = 'Medium')]
+    param(
+        [Parameter(
+            Mandatory = $true,
+            ValueFromPipeline = $true,
+            ValueFromPipelineByPropertyName = $false,
+            HelpMessage = 'SsoGroup instance you want to add to the target group')]
+        [VMware.vSphere.SsoAdminClient.DataTypes.Group]
+        $Group,
+
+        [Parameter(
+            Mandatory = $true,
+            ValueFromPipeline = $false,
+            ValueFromPipelineByPropertyName = $false,
+            HelpMessage = 'Target SsoGroup instance where the $Group wtill be added')]
+        [ValidateNotNull()]
+        [VMware.vSphere.SsoAdminClient.DataTypes.Group]
+        $TargetGroup)
+
+    Process {
+        try {
+            foreach ($g in $Group) {
+                $ssoAdminClient = $g.GetClient()
+                if ((-not $ssoAdminClient)) {
+                    Write-Error "Object '$g' is from disconnected server"
+                    continue
+                }
+
+                if ($g.GetClient().ServiceUri -ne $TargetGroup.GetClient().ServiceUri) {
+                    Write-Error "Group '$g' is not from the same server as the target group"
+                    continue
+                }
+
+                $result = $ssoAdminClient.AddGroupToGroup($g, $TargetGroup)
+                if (-not $result) {
+                    Write-Error "Group '$g' was not added to the target group. The Server operation result doesn't indicate success"
+                    continue
+                }
+            }
+        }
+        catch {
+            Write-Error (FormatError $_.Exception)
+        }
+    }
 }
 
-function Remove-PrincipalFromSsoGroup {
+function Remove-GroupFromSsoGroup {
+    <#
+    .NOTES
+    ===========================================================================
+    Created on:   	5/26/2021
+    Created by:   	Dimitar Milov
+    Twitter:       @dimitar_milov
+    Github:        https://github.com/dmilov
+    ===========================================================================
+
+
+    .SYNOPSIS
+    Removes a group to another group
+
+    .DESCRIPTION
+    Removes the specified group on $Group parameter from target group specified on $TargetGroup parameter
+
+    .PARAMETER Group
+    A Group instance to be removed from the $TargetGroup
+
+    .PARAMETER TargetGroup
+    A target group from which the $Group will be removed.
+
+    .EXAMPLE
+    $administratosGroup = Get-SsoGroup -Name 'Administrators' -Domain 'vsphere.local'
+    Get-SsoGroup -Name 'TestGroup' -Domain 'MyDomain' | Remove-GroupFromSsoGroup -TargetGroup $administratosGroup
+
+    Removes 'TestGroup' from 'MyDomain' domain from vsphere.local Administrators group.
+    #>
+    [CmdletBinding(ConfirmImpact = 'Medium')]
+    param(
+        [Parameter(
+            Mandatory = $true,
+            ValueFromPipeline = $true,
+            ValueFromPipelineByPropertyName = $false,
+            HelpMessage = 'SsoGroup instance you want to remove from the target group')]
+        [VMware.vSphere.SsoAdminClient.DataTypes.Group]
+        $Group,
+
+        [Parameter(
+            Mandatory = $true,
+            ValueFromPipeline = $false,
+            ValueFromPipelineByPropertyName = $false,
+            HelpMessage = 'Target SsoGroup instance from which the $Group wtill be removed')]
+        [ValidateNotNull()]
+        [VMware.vSphere.SsoAdminClient.DataTypes.Group]
+        $TargetGroup)
+
+    Process {
+        try {
+            foreach ($g in $Group) {
+                $ssoAdminClient = $g.GetClient()
+                if ((-not $ssoAdminClient)) {
+                    Write-Error "Object '$g' is from disconnected server"
+                    continue
+                }
+
+                if ($g.GetClient().ServiceUri -ne $TargetGroup.GetClient().ServiceUri) {
+                    Write-Error "Group '$g' is not from the same server as the target group"
+                    continue
+                }
+
+                $result = $ssoAdminClient.RemoveGroupFromGroup($g, $TargetGroup)
+                if (-not $result) {
+                    Write-Error "Group '$g' was not removed to the target group. The Server operation result doesn't indicate success"
+                    continue
+                }
+            }
+        }
+        catch {
+            Write-Error (FormatError $_.Exception)
+        }
+    }
+}
+
+function Add-UserToSsoGroup {
+    <#
+    .NOTES
+    ===========================================================================
+    Created on:   	5/26/2021
+    Created by:   	Dimitar Milov
+    Twitter:       @dimitar_milov
+    Github:        https://github.com/dmilov
+    ===========================================================================
+
+
+    .SYNOPSIS
+    Adds an user to a group
+
+    .DESCRIPTION
+    Adds the user on $User parameter to target group specified on $TargetGroup parameter
+
+    .PARAMETER User
+    A PersonUser instance to be added to the $TargetGroup
+
+    .PARAMETER TargetGroup
+    A target group to which the $User will be added.
+
+    .EXAMPLE
+    $administratosGroup = Get-SsoGroup -Name 'Administrators' -Domain 'vsphere.local'
+    Get-SsoPersonUser -Name 'TestUser' -Domain 'MyDomain' | Add-UserToSsoGroup -TargetGroup $administratosGroup
+
+    Adds 'TestUser' from 'MyDomain' domain to vsphere.local Administrators group.
+    #>
+    [CmdletBinding(ConfirmImpact = 'Medium')]
+    param(
+        [Parameter(
+            Mandatory = $true,
+            ValueFromPipeline = $true,
+            ValueFromPipelineByPropertyName = $false,
+            HelpMessage = 'PersonUser instance you want to add to the target group')]
+        [VMware.vSphere.SsoAdminClient.DataTypes.PersonUser]
+        $User,
+
+        [Parameter(
+            Mandatory = $true,
+            ValueFromPipeline = $false,
+            ValueFromPipelineByPropertyName = $false,
+            HelpMessage = 'Target SsoGroup instance where the $Group wtill be added')]
+        [ValidateNotNull()]
+        [VMware.vSphere.SsoAdminClient.DataTypes.Group]
+        $TargetGroup)
+
+    Process {
+        try {
+            foreach ($u in $User) {
+                $ssoAdminClient = $u.GetClient()
+                if ((-not $ssoAdminClient)) {
+                    Write-Error "Object '$u' is from disconnected server"
+                    continue
+                }
+
+                if ($u.GetClient().ServiceUri -ne $TargetGroup.GetClient().ServiceUri) {
+                    Write-Error "User '$u' is not from the same server as the target group"
+                    continue
+                }
+
+                $result = $ssoAdminClient.AddPersonUserToGroup($u, $TargetGroup)
+                if (-not $result) {
+                    Write-Error "User '$u' was not added to the target group. The Server operation result doesn't indicate success"
+                    continue
+                }
+            }
+        }
+        catch {
+            Write-Error (FormatError $_.Exception)
+        }
+    }
+}
+
+function Remove-UserFromSsoGroup {
+    <#
+    .NOTES
+    ===========================================================================
+    Created on:   	5/26/2021
+    Created by:   	Dimitar Milov
+    Twitter:       @dimitar_milov
+    Github:        https://github.com/dmilov
+    ===========================================================================
+
+
+    .SYNOPSIS
+    Removes a person user from group
+
+    .DESCRIPTION
+    Removes the specified person user on $User parameter from target group specified on $TargetGroup parameter
+
+    .PARAMETER User
+    A PersonUser instance to be removed from the $TargetGroup
+
+    .PARAMETER TargetGroup
+    A target group from which the $User will be removed.
+
+    .EXAMPLE
+    $administratosGroup = Get-SsoGroup -Name 'Administrators' -Domain 'vsphere.local'
+    Get-SsoPersonUser -Name 'TestUser' -Domain 'MyDomain' | Remove-UserFromSsoGroup -TargetGroup $administratosGroup
+
+    Removes 'TestUser' from 'MyDomain' domain from vsphere.local Administrators group.
+    #>
+    [CmdletBinding(ConfirmImpact = 'Medium')]
+    param(
+        [Parameter(
+            Mandatory = $true,
+            ValueFromPipeline = $true,
+            ValueFromPipelineByPropertyName = $false,
+            HelpMessage = 'PersonUser instance you want to remove from the target group')]
+        [VMware.vSphere.SsoAdminClient.DataTypes.PersonUser]
+        $User,
+
+        [Parameter(
+            Mandatory = $true,
+            ValueFromPipeline = $false,
+            ValueFromPipelineByPropertyName = $false,
+            HelpMessage = 'Target SsoGroup instance from which the $User wtill be removed')]
+        [ValidateNotNull()]
+        [VMware.vSphere.SsoAdminClient.DataTypes.Group]
+        $TargetGroup)
+
+    Process {
+        try {
+            foreach ($u in $User) {
+                $ssoAdminClient = $u.GetClient()
+                if ((-not $ssoAdminClient)) {
+                    Write-Error "Object '$u' is from disconnected server"
+                    continue
+                }
+
+                if ($u.GetClient().ServiceUri -ne $TargetGroup.GetClient().ServiceUri) {
+                    Write-Error "User '$u' is not from the same server as the target group"
+                    continue
+                }
+
+                $result = $ssoAdminClient.RemovePersonUserFromGroup($u, $TargetGroup)
+                if (-not $result) {
+                    Write-Error "User '$u' was not removed to the target group. The Server operation result doesn't indicate success"
+                    continue
+                }
+            }
+        }
+        catch {
+            Write-Error (FormatError $_.Exception)
+        }
+    }
 }
diff --git a/Modules/VMware.vSphere.SsoAdmin/VMware.vSphere.SsoAdmin.psd1 b/Modules/VMware.vSphere.SsoAdmin/VMware.vSphere.SsoAdmin.psd1
index 1d83b2f..096afa3 100644
--- a/Modules/VMware.vSphere.SsoAdmin/VMware.vSphere.SsoAdmin.psd1
+++ b/Modules/VMware.vSphere.SsoAdmin/VMware.vSphere.SsoAdmin.psd1
@@ -37,7 +37,7 @@ RequiredModules = @(
 FunctionsToExport = @(
     'Connect-SsoAdminServer', 'Disconnect-SsoAdminServer',
     'New-SsoPersonUser', 'Get-SsoPersonUser', 'Set-SsoPersonUser', 'Remove-SsoPersonUser', 'Set-SsoSelfPersonUserPassword'
-    'New-SsoGroup', 'Get-SsoGroup', 'Set-SsoGroup', 'Remove-SsoGroup', 'Add-PrincipalToSsoGroup', 'Remove-PrincipalFromSsoGroup'
+    'New-SsoGroup', 'Get-SsoGroup', 'Set-SsoGroup', 'Remove-SsoGroup', 'Add-GroupToSsoGroup', 'Remove-GroupFromSsoGroup', 'Add-UserToSsoGroup', 'Remove-UserFromSsoGroup'
     'Get-SsoPasswordPolicy', 'Set-SsoPasswordPolicy',
     'Get-SsoLockoutPolicy', 'Set-SsoLockoutPolicy',
     'Get-SsoTokenLifetime', 'Set-SsoTokenLifetime',
diff --git a/Modules/VMware.vSphere.SsoAdmin/net45/VMware.vSphere.SsoAdmin.Utils.dll b/Modules/VMware.vSphere.SsoAdmin/net45/VMware.vSphere.SsoAdmin.Utils.dll
index 97e1748..e686b49 100644
Binary files a/Modules/VMware.vSphere.SsoAdmin/net45/VMware.vSphere.SsoAdmin.Utils.dll and b/Modules/VMware.vSphere.SsoAdmin/net45/VMware.vSphere.SsoAdmin.Utils.dll differ
diff --git a/Modules/VMware.vSphere.SsoAdmin/net45/VMware.vSphere.SsoAdminClient.dll b/Modules/VMware.vSphere.SsoAdmin/net45/VMware.vSphere.SsoAdminClient.dll
index 4c0a426..04f65e3 100644
Binary files a/Modules/VMware.vSphere.SsoAdmin/net45/VMware.vSphere.SsoAdminClient.dll and b/Modules/VMware.vSphere.SsoAdmin/net45/VMware.vSphere.SsoAdminClient.dll differ
diff --git a/Modules/VMware.vSphere.SsoAdmin/netcoreapp3.1/VMware.vSphere.SsoAdmin.Utils.dll b/Modules/VMware.vSphere.SsoAdmin/netcoreapp3.1/VMware.vSphere.SsoAdmin.Utils.dll
index 4266670..1e8a71e 100644
Binary files a/Modules/VMware.vSphere.SsoAdmin/netcoreapp3.1/VMware.vSphere.SsoAdmin.Utils.dll and b/Modules/VMware.vSphere.SsoAdmin/netcoreapp3.1/VMware.vSphere.SsoAdmin.Utils.dll differ
diff --git a/Modules/VMware.vSphere.SsoAdmin/netcoreapp3.1/VMware.vSphere.SsoAdminClient.dll b/Modules/VMware.vSphere.SsoAdmin/netcoreapp3.1/VMware.vSphere.SsoAdminClient.dll
index 9c2c9c6..864158a 100644
Binary files a/Modules/VMware.vSphere.SsoAdmin/netcoreapp3.1/VMware.vSphere.SsoAdminClient.dll and b/Modules/VMware.vSphere.SsoAdmin/netcoreapp3.1/VMware.vSphere.SsoAdminClient.dll differ
diff --git a/Modules/VMware.vSphere.SsoAdmin/src/VMware.vSphere.SsoAdmin.Client/VMware.vSphere.SsoAdminClient/SsoAdminClient.cs b/Modules/VMware.vSphere.SsoAdmin/src/VMware.vSphere.SsoAdmin.Client/VMware.vSphere.SsoAdminClient/SsoAdminClient.cs
index eb64fe2..3e1f40c 100644
--- a/Modules/VMware.vSphere.SsoAdmin/src/VMware.vSphere.SsoAdmin.Client/VMware.vSphere.SsoAdminClient/SsoAdminClient.cs
+++ b/Modules/VMware.vSphere.SsoAdmin/src/VMware.vSphere.SsoAdmin.Client/VMware.vSphere.SsoAdminClient/SsoAdminClient.cs
@@ -487,6 +487,29 @@ namespace VMware.vSphere.SsoAdminClient
                      group.Name)).Result;
         }
 
+        public bool AddGroupToGroup(DataTypes.Group groupToAdd, DataTypes.Group destinationGroup)
+        {
+            // Create Authorization Invocation Context
+            var authorizedInvocationContext =
+               CreateAuthorizedInvocationContext();
+
+            // Invoke SSO Admin AddGroupToLocalGroupAsync operation
+            return authorizedInvocationContext.
+               InvokeOperation(() =>
+                  _ssoAdminBindingClient.AddGroupToLocalGroupAsync(
+                     new ManagedObjectReference
+                     {
+                         type = "SsoAdminPrincipalManagementService",
+                         Value = "principalManagementService"
+                     },
+                     new SsoPrincipalId
+                     {
+                         name = groupToAdd.Name,
+                         domain = groupToAdd.Domain
+                     },
+                     destinationGroup.Name)).Result;
+        }
+
         public bool RemovePersonUserFromGroup(PersonUser user, DataTypes.Group group)
         {
             // Create Authorization Invocation Context
@@ -510,6 +533,29 @@ namespace VMware.vSphere.SsoAdminClient
                      group.Name)).Result;
         }
 
+        public bool RemoveGroupFromGroup(DataTypes.Group groupToRemove, DataTypes.Group group)
+        {
+            // Create Authorization Invocation Context
+            var authorizedInvocationContext =
+               CreateAuthorizedInvocationContext();
+
+            // Invoke SSO Admin RemoveFromLocalGroupAsync operation
+            return authorizedInvocationContext.
+               InvokeOperation(() =>
+                  _ssoAdminBindingClient.RemoveFromLocalGroupAsync(
+                     new ManagedObjectReference
+                     {
+                         type = "SsoAdminPrincipalManagementService",
+                         Value = "principalManagementService"
+                     },
+                     new SsoPrincipalId
+                     {
+                         name = groupToRemove.Name,
+                         domain = groupToRemove.Domain
+                     },
+                     group.Name)).Result;
+        }
+
         public void ResetPersonUserPassword(PersonUser user, string newPassword)
         {
             // Create Authorization Invocation Context
diff --git a/Modules/VMware.vSphere.SsoAdmin/src/test/Group.Tests.ps1 b/Modules/VMware.vSphere.SsoAdmin/src/test/Group.Tests.ps1
index 80ee7dc..29b5d3c 100644
--- a/Modules/VMware.vSphere.SsoAdmin/src/test/Group.Tests.ps1
+++ b/Modules/VMware.vSphere.SsoAdmin/src/test/Group.Tests.ps1
@@ -29,6 +29,7 @@ Describe "SsoGroup Tests" {
             -SkipCertificateCheck
 
         $script:testGroupsToDelete = @()
+        $script:testUsersToDelete = @()
     }
 
     AfterEach {
@@ -37,6 +38,10 @@ Describe "SsoGroup Tests" {
             Remove-SsoGroup -Group $group
         }
 
+        foreach ($user in $script:testUsersToDelete) {
+            Remove-SsoPersonUser -User $user
+        }
+
         $connectionsToCleanup = $global:DefaultSsoAdminServers.ToArray()
         foreach ($connection in $connectionsToCleanup) {
             Disconnect-SsoAdminServer -Server $connection
@@ -106,7 +111,7 @@ Describe "SsoGroup Tests" {
             $actual = New-SsoGroup -Name $expectedName -Description $expectedDescription
 
             # Assert
-            $actual | Should -Not -Be $
+            $actual | Should -Not -Be $null
             $script:testGroupsToDelete += $actual
             $actual.Name | Should -Be $expectedName
             $actual.Domain | Should -Be 'vsphere.local'
@@ -144,4 +149,74 @@ Describe "SsoGroup Tests" {
             $actual.Description | Should -Be $expectedDescription
         }
     }
+
+    Context "Add-GroupToSsoGroup" {
+        It 'Should add a newly created SsoGroup to another SsoGroup' {
+            # Arrange
+            $groupName = 'TestGroup5'
+            $groupToAdd = New-SsoGroup -Name $groupName
+            $script:testGroupsToDelete += $groupToAdd
+
+            $targetGroup = Get-SsoGroup -Name 'Administrators' -Domain 'vsphere.local'
+
+            # Act
+            $groupToAdd | Add-GroupToSsoGroup -TargetGroup $targetGroup
+
+            # Assert
+            ## TODO: Implement Get Group Members and verify
+        }
+    }
+
+    Context "Remove-GroupFromSsoGroup" {
+        It 'Should remove a SsoGroup from another SsoGroup' {
+            # Arrange
+            $groupName = 'TestGroup6'
+            $groupToRemove = New-SsoGroup -Name $groupName
+            $script:testGroupsToDelete += $groupToRemove
+
+            $targetGroup = Get-SsoGroup -Name 'Administrators' -Domain 'vsphere.local'
+            $groupToRemove | Add-GroupToSsoGroup -TargetGroup $targetGroup
+
+            # Act
+            $groupToRemove | Remove-GroupFromSsoGroup -TargetGroup $targetGroup
+
+            # Assert
+            ## TODO: Implement Get Group Members and verify
+        }
+    }
+
+    Context "Add-UserToSsoGroup" {
+        It 'Should add a newly created PersonUser to SsoGroup' {
+            # Arrange
+            $expectedUser = New-SsoPersonUser -User 'GroupTestUser1' -Password 'MyStrongPa$$w0rd'
+            $script:testUsersToDelete += $expectedUser
+
+            $targetGroup = Get-SsoGroup -Name 'Administrators' -Domain 'vsphere.local'
+
+            # Act
+            $expectedUser | Add-UserToSsoGroup -TargetGroup $targetGroup
+
+            # Assert
+            $actualUsers = $targetGroup | Get-SsoPersonUser
+            $actualUsers | Where-Object { $_.Name -eq $expectedUser.Name} | Should -Not -Be $null
+        }
+    }
+
+    Context "Remove-GroupFromSsoGroup" {
+        It 'Should remove a SsoGroup from another SsoGroup' {
+            # Arrange
+            $expectedUser = New-SsoPersonUser -User 'GroupTestUser2' -Password 'MyStrongPa$$w0rd'
+            $script:testUsersToDelete += $expectedUser
+
+            $targetGroup = Get-SsoGroup -Name 'Administrators' -Domain 'vsphere.local'
+            $expectedUser | Add-UserToSsoGroup -TargetGroup $targetGroup
+
+            # Act
+            $expectedUser | Remove-UserFromSsoGroup -TargetGroup $targetGroup
+
+            # Assert
+            $actualUsers = $targetGroup | Get-SsoPersonUser
+            $actualUsers | Where-Object { $_.Name -eq $expectedUser.Name} | Should -Be $null
+        }
+    }
 }
\ No newline at end of file