A WA piggeries company, its manager and an employee were before court on Friday morning facing several charges relating to the illegal importation of pig semen.

The accused faced Mandurah court on Friday morning. Credit:John Russell

GD Pork Pty Ltd have yet to plead to 12 charges of aggravated illegal importation and four charges of bringing or importing conditionally non-prohibited goods into Australian territory.

Managing director Torben Soerensen and internal consultant Henning Laue did not enter pleas in the Mandurah Magistrates Court to 11 charges of aiding, abetting, counselling or procuring the commissioning of an offence.

The case has been the subject of an ongoing investigation by the Department of Agriculture and Water Resources since January 2017.