1. Login to Fresa Gold and navigate to Masters–> Organization and select an organization (Fig.1)

Screenshot_1

Fig.1

2. Now select the Employee tab and select department as Sales and select the Employee name and click Save (Fig.2)

Screenshot_2

3. Now if you create a shipment for that organization it will show the sales person in the shipment as default (Fig.3) & (Fig.4)

Screenshot_3

Fig.3

Screenshot_4

Fig.4

Hope you got an idea about how to auto pickup salesperson in shipment.