Auckland- Advanced DrillingOtahuhu
- Craig McKenzieGreen Bay
- Directional Boring NZ LtdOrakei
- McEntee Drilling LimitedKaraka
- On Target Directional DrillingSwanson
- Phillips I R & C SKaraka
- Pipeline Solutions LtdBrookby
- The Chain GangGreen Bay
Bay of Plenty- Armadillo Holdings LtdTe Puke
- Dingo Does ItKatikati
- Dingo Contracting LtdTe Puna
- Eastern Bay Thrusting LtdOhope
- Garry'z Dingo ServicesOropi
Canterbury- Trenching DynamixWoolston
- Underground Brown LtdPapanui
Hawke's Bay- Dudding ContractorsMeeanee
- Aaron's DingoHavelock North
- Baywide Dingo'sBay View
- Dudding ContractorsGreenmeadows
Manawatu- Earth ServicesTokomaru
- Scotty's Fencing Contractors Dingo Mini DiggerHalcombe
Northland- Ivan Turner ContractorMangonui
- Ivan Turner ContractorCoopers Beach
- Kaipara Trenching LtdDargaville
- Northland Laser DrainageDargaville
- Northland Underground ThrustingKamo
- Terrasaw Industries LtdMatakohe
Taranaki- Central Directional Drilling LtdLepperton
Waikato- Odlum Cable Installers LtdMorrinsville
- Te Kowhai ServicesFrankton
- Valley Thrusting ContractorsWaihi
- Waikato Thrusting ServicesFrankton
Wellington- Mexted Contractors LtdPlimmerton
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