Twenty years of Draeinail: founded by drainlayers, still run by them
Most civil contracting businesses are built the same way round: someone starts a company, then hires the people who know how to do the work. Draeinail was built the other way. It was started by drainlayers, it is still run by drainlayers, and two of the three directors are described on the company own site not as executives but as lead drainlayers.
That detail explains more about how the business operates than any capability statement would.
The business marked twenty years in August 2026. Two decades is long enough in civil contracting to have worked through a global financial crisis, a building boom, a pandemic and the downturn that followed it. Plenty of firms that started around the same time are no longer trading. This one is still owned and run by the people who started it, which in a trade with this much cyclical risk is the harder achievement.
It started with drainage, and it still starts with drainage
The company began as a specialist drainage business south of Auckland, and after twenty years in the region it has grown into large civil infrastructure, subdivision works and energy sector civils. What has not happened is the thing that usually happens when a trade business grows: drainage did not become the small job the company takes on to keep crews busy between the real work. It stayed the core discipline, and the wider civil capability was built outward from it.
That matters commercially, because the hardest drainage is the drainage other contractors would rather not price. Deep excavation, shoring, work in live environments, connections into networks that cannot be taken out of service. Those jobs are won on capability rather than rate, and they are the jobs a business founded by drainlayers is set up to take. The service pages for drainlaying and drainage contracting and civil and drainage contracting set out where that capability sits today.
The people who own the business are the people who do the work
Draeinail is run by three working directors, each with a defined role rather than a shared title:
Joe Dorizac — Director and Lead Drainlayer.
Darryn Muir — Director and Lead Drainlayer.
Matt Hamilton — Director and Project Manager.
Two lead drainlayers and a project manager is an unusual ownership structure for a civil contractor of this size, and it has a practical consequence for clients. The person who prices the job, the person who runs the job, and the person who owns the outcome are not three different departments. When a trench hits rock, or a service turns up where the plans said it would not, the decision gets made by someone who has stood in that trench themselves.
Alongside the directors, the business names two other key people: Jono Davis, who leads the Queenstown operation, and Mark Wetzel, who runs transport and maintenance. In a business whose competitive position rests on owning its plant, the person keeping that plant running is not a back office role.
Two of the three owners are lead drainlayers. In a trade where the difference between a good job and an expensive one is decided in the ground, that is the whole proposition.
Twenty-five people, and what that size actually buys
The team is around twenty-five: registered drainlayers, machine operators and labourers. That is a deliberate size. It is large enough to self-perform a full civil package and hold more than one site at once, and small enough that the directors still know every job on the board.
It is also the size at which a contractor becomes useful to a tier one. Draeinail works as a subcontractor to some of the largest civil contractors operating in New Zealand, including public sewer installation on the Penlink project for Fulton Hogan, enabling works at Tauriko West for Downer, stormwater upgrades at Paerata Station and the Wiri EMU depot for TRS, and brownfields infrastructure upgrades through the LEAD Alliance for Kainga Ora. In the energy sector it delivers civil works for Ventia and within Vector programmes, including transformer and ring main unit upgrades and the Spark data centre upgrade at Takanini.
More recently the Queenstown crew has been engaged on HDPE pipeline installation for McConnell Dowell. That work is covered in HDPE pipeline installation.
Two bases, eleven hundred kilometres apart
The business runs from two permanent bases. The original operation sits south of Auckland in the Franklin district, and a permanent crew has been established in Queenstown to serve the Southern Lakes and Central Otago.
A permanent southern crew is a different commitment from flying people down for a job. It means plant in the region, people who live there, and the ability to be on site the same morning rather than the following week. What that looks like in practice is set out in civil and drainage contracting in Queenstown.
Owning the gear rather than hiring it
Draeinail self-performs, and it owns the plant to do it: eleven excavators from five to thirty-five tonnes, three telehandlers, support tractors and compactors, trucks and truck and trailer units, an articulated transporter rated to twenty-five tonnes, bypass pumps and dewatering equipment, trench and manhole shields, testing and survey gear, and its own traffic management.
The reason that list matters is programme risk. A contractor who hires plant is exposed to whether the hire company has a machine available on the day the programme needs it. A contractor who owns eleven excavators is not. On a job with a fixed possession window or a live service to work around, that difference decides whether the work happens. The full inventory is on the fleet and plant page.
Safety as a condition of entry
Subcontracting to tier one contractors sets a floor on health and safety that smaller operators often cannot meet. The team is Site Safe trained, and every employee is competency assessed against the Construction Safety Council tier one framework. The company built its own health and safety management system with an external specialist rather than adopting a generic template, and it runs documented safe operating procedures with in-house practical training on concrete pipe cutting, excavator operation, and lifting and slinging. Tickets held across the team include confined space entry, first aid, traffic control and driver endorsements for wheels, tracks and roller.
That is covered in detail on the health, safety and accreditation page. It is worth saying plainly: this is not a marketing section. It is the reason the business is allowed on the sites it works on.
What has stayed the same
The company describes what it does as large civil drainage and sub-divisional works, and what it sells as quality of work and a can do attitude. Twenty years on from a drainage crew working south of Auckland, the scope has widened into infrastructure, subdivision and energy, and the geography now runs from Franklin to Central Otago. The structure underneath it has not changed: working owners, a crew that self-performs, and plant that belongs to the business.
Questions we get asked
How long has Draeinail been operating?
Twenty years, marked in August 2026. It began as a specialist drainage business south of Auckland and expanded into civil infrastructure, subdivision and energy sector works.
Who owns and runs the business?
Three working directors: Joe Dorizac and Darryn Muir, both lead drainlayers, and Matt Hamilton, project manager. Jono Davis leads the Queenstown operation and Mark Wetzel manages transport and maintenance.
How big is the team?
Around twenty-five people, made up of registered drainlayers, machine operators and labourers, across the South Auckland and Queenstown bases.
Do you work directly for property owners and developers, or only as a subcontractor?
Both. The business works directly for developers, builders and property owners on subdivision and site works, and subcontracts to tier one civil contractors on major infrastructure projects.
Do you hire in plant?
The intent is to self-perform with owned plant, which is why the fleet runs to eleven excavators and its own transport. That is a programme reliability decision as much as a cost one.
Draeinail Construction works across Auckland, the Franklin district and the Southern Lakes. Request a quote or call Darryn Muir on 021 271 0035.
