partner-contact/partner_contact_job_position/views/res_partner_view.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

    <record model="ir.ui.view" id="view_partner_form_job_position">
        <field name="name">Partner form with job position</field>
        <field name="model">res.partner</field>
        <field name="inherit_id" ref="base.view_partner_form"/>
        <field name="arch" type="xml">
            <field name="function" position="before">
                <field name="job_position_id"
                       attrs="{'invisible': [('is_company','=', True)]}"
                       options='{"no_open": True}'/>
            </field>
            <xpath expr="//field[@name='child_ids']/form//field[@name='function']"
                   position="before">
                <field name="job_position_id"
                       attrs="{'invisible': [('is_company','=', True)]}"
                       options='{"no_open": True}'/>
            </xpath>
        </field>
    </record>

    <record model="ir.ui.view" id="view_res_partner_filter_job_position">
        <field name="name">Partner search with job position</field>
        <field name="model">res.partner</field>
        <field name="inherit_id" ref="base.view_res_partner_filter"/>
        <field name="arch" type="xml">
            <field name="category_id" position="after">
                <field name="job_position_id"/>
            </field>
            <filter name="salesperson" position="after">
                <filter name="job_position"
                        string="Job position"
                        domain="[('is_company','=', True)]"
                        context="{'group_by': 'job_position_id'}"/>
            </filter>
        </field>
    </record>

</odoo>