hr_employee_organization_unit/views/hr_employee_views.xml
<?xml version="1.0" encoding="utf-8" ?>
<openerp>
<data>
<record id="hr_employee_view_form" model="ir.ui.view">
<field name="name">Inherit: HR Employee Organization Unit Form</field>
<field name="model">hr.employee</field>
<field name="inherit_id" ref="hr.view_employee_form" />
<field name="arch" type="xml">
<xpath expr="//field[@name='department_id']" position="before">
<field name="organization_unit_id" />
</xpath>
</field>
</record>
<record id="hr_employee_view_search" model="ir.ui.view">
<field name="name">Inherit: HR Employee Organization Unit Search</field>
<field name="model">hr.employee</field>
<field name="inherit_id" ref="hr.view_employee_filter" />
<field name="arch" type="xml">
<xpath expr="//group" position="inside">
<filter
name="grp_organization_unit"
string="Organization Unit"
context="{'group_by':'organization_unit_id'}"
/>
</xpath>
</field>
</record>
</data>
</openerp>