diff --git a/manifests/init.pp b/manifests/init.pp
index 50c4b0692..446c3ea8c 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -58,6 +58,9 @@
   Hash[String, Hash] $ignoredsubnets                               = {},
   Hash[String, Hash] $pools                                        = {},
   Hash[String, Hash] $pools6                                       = {},
+  Array[String[1]] $on_commit                                      = [],
+  Array[String[1]] $on_release                                     = [],
+  Array[String[1]] $on_expiry                                      = [],
   Optional[Stdlib::Absolutepath] $dhcpd_binary                     = $dhcp::params::dhcpd_binary
 ) inherits dhcp::params {
   # check if extra_config is a string, if so convert it to an array
diff --git a/manifests/pool.pp b/manifests/pool.pp
index 48b0f666d..a739d2743 100644
--- a/manifests/pool.pp
+++ b/manifests/pool.pp
@@ -14,6 +14,10 @@
   Optional[Integer] $mtu                    = undef,
   String $domain_name                       = '',
   $ignore_unknown                           = undef,
+  Array[String[1]] $on_commit               = [],
+  Array[String[1]] $on_release              = [],
+  Array[String[1]] $on_expiry               = [],
+
 ) {
   include dhcp::params
 
diff --git a/manifests/pool6.pp b/manifests/pool6.pp
index b8889b1f3..60cf7d702 100644
--- a/manifests/pool6.pp
+++ b/manifests/pool6.pp
@@ -14,6 +14,9 @@
   Optional[Integer] $mtu                    = undef,
   String $domain_name                       = '',
   $ignore_unknown                           = undef,
+  Array[String[1]] $on_commit               = [],
+  Array[String[1]] $on_release              = [],
+  Array[String[1]] $on_expiry               = [],
 ) {
   include dhcp::params
 
diff --git a/spec/classes/dhcp_spec.rb b/spec/classes/dhcp_spec.rb
index 6c8127df8..1eb0099ce 100644
--- a/spec/classes/dhcp_spec.rb
+++ b/spec/classes/dhcp_spec.rb
@@ -673,5 +673,63 @@
         expect(content.split("\n").reject { |l| l =~ %r{^#|^$} }).to match_array(expected_lines)
       end
     end
+
+    context 'when event clauses defined' do
+      let :params do
+        default_params.merge(
+          'interface' =>  'eth0',
+          'on_commit' => [
+            'set ClientIP = binary-to-ascii(10, 8, ".", leased-address)',
+            'execute("/usr/local/bin/my_dhcp_helper.sh", ClientIP)'
+          ],
+          'on_release' => [
+            'set ClientIP = binary-to-ascii(10, 8, ".", leased-address)',
+            'log(concat("Released IP: ", ClientIP))'
+          ],
+          'on_expiry' => [
+            'set ClientIP = binary-to-ascii(10, 8, ".", leased-address)',
+            'log(concat("Expired IP: ", ClientIP))'
+          ]
+        )
+      end
+
+      it 'event clauses are present' do
+        content = catalogue.resource('concat::fragment', 'dhcp-conf-header').send(:parameters)[:content]
+        expected_lines = [
+          '# BEGIN DHCP Header',
+          '# ----------',
+          '# dhcpd.conf',
+          '# ----------',
+          'authoritative;',
+          'default-lease-time 43200;',
+          'max-lease-time 86400;',
+          'log-facility daemon;',
+          '',
+          '# ----------',
+          '# Options',
+          '# ----------',
+          'option domain-name "sampledomain.com";',
+          'option domain-name-servers 1.1.1.1;',
+          'option dhcp6.name-servers 1:5ee:bad::c0de;',
+          'option fqdn.no-client-update on;  # set the "O" and "S" flag bits',
+          'option fqdn.rcode2 255;',
+          'option pxegrub code 150 = text;',
+          'on commit {',
+          '  set ClientIP = binary-to-ascii(10, 8, ".", leased-address);',
+          '  execute("/usr/local/bin/my_dhcp_helper.sh", ClientIP);',
+          '}',
+          'on release {',
+          '  set ClientIP = binary-to-ascii(10, 8, ".", leased-address);',
+          '  log(concat("Released IP: ", ClientIP));',
+          '}',
+          'on expiry {',
+          '  set ClientIP = binary-to-ascii(10, 8, ".", leased-address);',
+          '  log(concat("Expired IP: ", ClientIP));',
+          '}',
+          '# END DHCP Header',
+        ]
+        expect(content.split("\n")).to match_array(expected_lines)
+      end
+    end
   end
 end
diff --git a/spec/defines/pool6_spec.rb b/spec/defines/pool6_spec.rb
index 23f1d7091..aa1c8d6df 100644
--- a/spec/defines/pool6_spec.rb
+++ b/spec/defines/pool6_spec.rb
@@ -13,7 +13,7 @@
       }
     }
   end
-  let :params do
+  let :default_params do
     {
       'network'  => '2001:db8::',
       'prefix'   => 64,
@@ -21,5 +21,58 @@
     }
   end
 
-  it { is_expected.to contain_concat__fragment("dhcp_pool_#{title}") }
+  context 'creates a pool definition' do
+    let(:params) { default_params }
+
+    it { is_expected.to contain_concat__fragment("dhcp_pool_#{title}") }
+  end
+
+  context 'when optional parameters defined' do
+    let(:params) do
+      default_params.merge(
+        'on_commit' => [
+          'set ClientIP = binary-to-ascii(10, 8, ".", leased-address)',
+          'execute("/usr/local/bin/my_dhcp_helper.sh", ClientIP)'
+        ],
+        'on_release' => [
+          'set ClientIP = binary-to-ascii(10, 8, ".", leased-address)',
+          'log(concat("Released IP: ", ClientIP))'
+        ],
+        'on_expiry' => [
+          'set ClientIP = binary-to-ascii(10, 8, ".", leased-address)',
+          'log(concat("Expired IP: ", ClientIP))'
+        ]
+      )
+    end
+
+    it 'creates a pool declaration with optional parameters' do
+      content = catalogue.resource('concat::fragment', "dhcp_pool_#{title}").send(:parameters)[:content]
+      expected_lines = [
+        '#################################',
+        "# #{title} #{params['network']}/#{params['prefix']}",
+        '#################################',
+        "subnet6 #{params['network']}/#{params['prefix']} {",
+        '  pool6',
+        '  {',
+        "    range6 #{params['range']};",
+        '',
+        '  }',
+        '',
+        '  on commit {',
+        '    set ClientIP = binary-to-ascii(10, 8, ".", leased-address);',
+        '    execute("/usr/local/bin/my_dhcp_helper.sh", ClientIP);',
+        '  }',
+        '  on release {',
+        '    set ClientIP = binary-to-ascii(10, 8, ".", leased-address);',
+        '    log(concat("Released IP: ", ClientIP));',
+        '  }',
+        '  on expiry {',
+        '    set ClientIP = binary-to-ascii(10, 8, ".", leased-address);',
+        '    log(concat("Expired IP: ", ClientIP));',
+        '  }',
+        '}',
+      ]
+      expect(content.split("\n")).to match_array(expected_lines)
+    end
+  end
 end
diff --git a/spec/defines/pool_spec.rb b/spec/defines/pool_spec.rb
index 373f104c8..5c4d1b775 100644
--- a/spec/defines/pool_spec.rb
+++ b/spec/defines/pool_spec.rb
@@ -13,14 +13,68 @@
       }
     }
   end
-  let :params do
+  let :default_params do
     {
       'gateway'  => '1.1.1.1',
       'mask'     => '255.255.255.0',
       'network'  => '1.1.1.0',
-      'range'    => ['1.1.1.100', '1.1.1.110']
+      'range'    => '1.1.1.100 1.1.1.110'
     }
   end
 
-  it { is_expected.to contain_concat__fragment("dhcp_pool_#{title}") }
+  context 'creates a pool definition' do
+    let(:params) { default_params }
+
+    it { is_expected.to contain_concat__fragment("dhcp_pool_#{title}") }
+  end
+
+  context 'when optional parameters defined' do
+    let(:params) do
+      default_params.merge(
+        'on_commit' => [
+          'set ClientIP = binary-to-ascii(10, 8, ".", leased-address)',
+          'execute("/usr/local/bin/my_dhcp_helper.sh", ClientIP)'
+        ],
+        'on_release' => [
+          'set ClientIP = binary-to-ascii(10, 8, ".", leased-address)',
+          'log(concat("Released IP: ", ClientIP))'
+        ],
+        'on_expiry' => [
+          'set ClientIP = binary-to-ascii(10, 8, ".", leased-address)',
+          'log(concat("Expired IP: ", ClientIP))'
+        ]
+      )
+    end
+
+    it 'creates a pool declaration with optional parameters' do
+      content = catalogue.resource('concat::fragment', "dhcp_pool_#{title}").send(:parameters)[:content]
+      expected_lines = [
+        '#################################',
+        "# #{title} #{params['network']} #{params['mask']}",
+        '#################################',
+        "subnet #{params['network']} netmask #{params['mask']} {",
+        '  pool',
+        '  {',
+        "    range #{params['range']};",
+        '  }',
+        '',
+        "  option subnet-mask #{params['mask']};",
+        "  option routers #{params['gateway']};",
+        '  on commit {',
+        '    set ClientIP = binary-to-ascii(10, 8, ".", leased-address);',
+        '    execute("/usr/local/bin/my_dhcp_helper.sh", ClientIP);',
+        '  }',
+        '  on release {',
+        '    set ClientIP = binary-to-ascii(10, 8, ".", leased-address);',
+        '    log(concat("Released IP: ", ClientIP));',
+        '  }',
+        '  on expiry {',
+        '    set ClientIP = binary-to-ascii(10, 8, ".", leased-address);',
+        '    log(concat("Expired IP: ", ClientIP));',
+        '  }',
+        '}',
+      ]
+      expect(content.split("\n")).to match_array(expected_lines)
+    end
+  end
 end
diff --git a/templates/dhcpd.conf-header.erb b/templates/dhcpd.conf-header.erb
index 77422a4ea..4b2cf0bff 100644
--- a/templates/dhcpd.conf-header.erb
+++ b/templates/dhcpd.conf-header.erb
@@ -47,4 +47,25 @@ option <%= @globaloptions %>;
 <% if has_variable?( 'mtu' ) && @mtu -%>
 option interface-mtu <%= @mtu %>;
 <% end -%>
+<% if not @on_commit.empty? -%>
+on commit {
+<% @on_commit.each do |statement| -%>
+  <%= statement %>;
+<% end -%>
+}
+<% end -%>
+<% if not @on_release.empty? -%>
+on release {
+<% @on_release.each do |statement| -%>
+  <%= statement %>;
+<% end -%>
+}
+<% end -%>
+<% if not @on_expiry.empty? -%>
+on expiry {
+<% @on_expiry.each do |statement| -%>
+  <%= statement %>;
+<% end -%>
+}
+<% end -%>
 # END DHCP Header
diff --git a/templates/dhcpd.pool.erb b/templates/dhcpd.pool.erb
index 0114019c4..a8d1c6847 100644
--- a/templates/dhcpd.pool.erb
+++ b/templates/dhcpd.pool.erb
@@ -59,5 +59,26 @@ subnet <%= @network %> netmask <%= @mask %> {
 <% if @mtu -%>
   option interface-mtu <%= @mtu %>;
 <% end -%>
+<% if not @on_commit.empty? -%>
+  on commit {
+<% @on_commit.each do |statement| -%>
+    <%= statement %>;
+<% end -%>
+  }
+<% end -%>
+<% if not @on_release.empty? -%>
+  on release {
+<% @on_release.each do |statement| -%>
+    <%= statement %>;
+<% end -%>
+  }
+<% end -%>
+<% if not @on_expiry.empty? -%>
+  on expiry {
+<% @on_expiry.each do |statement| -%>
+    <%= statement %>;
+<% end -%>
+  }
+<% end -%>
 }
 
diff --git a/templates/dhcpd.pool6.erb b/templates/dhcpd.pool6.erb
index 105933697..ae24e57b8 100644
--- a/templates/dhcpd.pool6.erb
+++ b/templates/dhcpd.pool6.erb
@@ -63,5 +63,26 @@ subnet6 <%= @network %>/<%= @prefix %> {
 <% if @mtu -%>
   option interface-mtu <%= @mtu %>;
 <% end -%>
+<% if not @on_commit.empty? -%>
+  on commit {
+<% @on_commit.each do |statement| -%>
+    <%= statement %>;
+<% end -%>
+  }
+<% end -%>
+<% if not @on_release.empty? -%>
+  on release {
+<% @on_release.each do |statement| -%>
+    <%= statement %>;
+<% end -%>
+  }
+<% end -%>
+<% if not @on_expiry.empty? -%>
+  on expiry {
+<% @on_expiry.each do |statement| -%>
+    <%= statement %>;
+<% end -%>
+  }
+<% end -%>
 }