The National Broadband Network Company's (NBN Co's) head of construction Patrick Flannigan has resigned in the middle of the controversy surrounding the company's decision to halt the bidding process for the network construction tender.

With the NBN hitting roadblock after roadblock, this is yet another set back for the delayed network. With the company saying:

NBN Co is disappointed that Patrick Flannigan, head of construction, has decided to resign. He made a valuable contribution to the leadership team and we wish him all the best in the future.

Meanwhile Dan Fleming the NBN Co's general manager of construction design and planning will now take control as acting head of construction, the NBN Co said.