Seatech Systems

At sea.On site.Kept running.

Sea-Tech Systems installs, repairs and certifies marine automation, in-building mobile coverage and commercial electrical systems. One Sydney crew, both sides of the wharf.

Get a quote See our services
  • ISO 9001 quality
  • ISO 14001 environmental
  • ISO 45001 safety
  • NSW electrical contractor licence 490328C
Certificate AUP1477IMS. ISO 27001 information security in progress.

One crew for the vessel and the building

We keep the marine, cellular and electrical systems our customers depend on running safely, and we aim to get it right the first time.

Sea-Tech Systems started on the water, fixing and fitting the automation and electrical systems that keep vessels moving. That same fault-finding discipline now runs our cellular and commercial electrical division, where we bring mobile signal into buildings that have none and keep Government Radio Network sites on air.

Both divisions work under the same certified management system, so a ship's engineer and a building manager get the same paperwork, the same safety standard and the same people answering the phone.

Based in
Rockdale, Sydney NSW
Divisions
Marine automation and electrical; cellular and commercial electrical
Marine partners
Praxis Automation Systems (Netherlands)
RH Marine (Netherlands)
Hallidays Engineering (Sydney)
Cellular partners
Nilsen, Powertec
Management
Mark, Technical Manager
Alex, Electrical Manager
Certified to
ISO 9001, ISO 14001, ISO 45001
Licensed
NSW Electrical Contractor Licence 490328C

How in-building coverage works

A donor antenna on the roof picks up signal from the nearest mobile tower. We carry it down through the building and rebroadcast it on every floor, from the basement car park to the top office.

  1. Donor antenna captures the macro network signal
  2. DAS headend converts and distributes it
  3. Fibre and coax carry it to every area
  4. Discreet indoor antennas give seamless coverage
Diagram of cellular in-building coverage: donor antenna, DAS headend, distribution network and indoor antennas

What we do

Marine, cellular and electrical work, one standard throughout. Tell us what has stopped working, or what you are planning to build, and we will send the right technician.

Marine automation and electrical

For ship operators, superintendents and yards. We service all major automation brands, alongside or at sea.

Engineer at a ship's bridge console Engine control panel with monitoring screens Marina with moored vessels
  • Breakdown responseFault finding and repair on automation, alarm, monitoring and electrical systems.
  • New installationsSupply, install and commission automation and electrical systems on new and refitted vessels.
  • Specialised partsWe source, stock and fit hard-to-find parts so your vessel spends less time waiting.
  • Calibration and class certificatesTesting and calibration of marine hardware, with a certificate issued to class requirements.

Cellular and commercial electrical

For building owners, facility managers and builders who need signal and power where people actually work.

Two phones showing the Seatech Systems logo Wall of mobile coverage repeater units in a plant room Riser cabinet with remote units
  • In-building mobile coverageRepeaters, distributed antenna systems and donor antennas for basements, towers and plant rooms.
  • Government Radio NetworkInstallation and maintenance of GRN equipment for emergency services coverage.
  • Commercial electricalElectrical installations, repairs and fit-outs for commercial sites.
  • MaintenanceScheduled checks and repairs so coverage and power systems keep performing.

Electrical and EV chargers

For homes, strata and businesses adding EV charging. One licensed crew handles the cable run, the charger and the paperwork.

Mini excavator beside a trench with conduit laid for an underground cable run Zappi EV charger mounted on a post with isolator and junction box
  • EV charger installationSupply and install of wall and post mounted chargers, sized to your vehicle and supply.
  • Underground cable runsTrenching, conduit and cabling to bring power to driveways, carports and detached garages.
  • Switchboard and load checksWe check your board and supply capacity first, and upgrade where the charger needs it.
  • Testing and certificationEvery job tested and certified under NSW electrical contractor licence 490328C.

Commercial electrical

For builders, facility managers and building owners who need power installed, upgraded or kept running.

Orange commercial distribution board with Schneider breakers and power meters Sea-Tech electrician on a ladder pulling cables into a Schneider switchboard
  • Switchboards and distributionNew boards, upgrades and sub-mains for commercial and multi-storey buildings.
  • Fit-outs and installationsPower, lighting and cabling for new builds, refurbishments and plant rooms.
  • Fault finding and repairsFast diagnosis and repair when circuits trip or equipment loses power.
  • Maintenance and testingScheduled inspections and testing to keep sites safe and compliant.

Meet some of the team

The licensed electricians and technicians who turn up on site. Same crew, same uniform, same standard on every job.

Five Sea-Tech Systems technicians in company polo shirts standing arms crossed in front of a work ute in a basement car park

Recent work

A look at an in-building coverage job from roof to basement.

Technician fitting braced masts with three directional donor antennas on a metal roof
Cellular

Rooftop donor antenna array

Two braced masts and three directional antennas fixed to a metal roof, aimed at the nearest carrier towers to feed the building's coverage system.

Wall of repeater units with cabling and power outlets
Cellular and electrical

Multi-carrier repeater wall

Four repeater units, combiners and dedicated power circuits installed and labelled in a basement plant room.

Bundle of coaxial feeder cables in a building riser
Cellular

Riser feeder run

Coaxial feeders run through the riser and terminated at roof level.

Wall cabinet containing remote coverage units
Cellular

Floor remote units

Remote units in a lockable cabinet, one per zone.

Donor antennas mounted on a rooftop plant enclosure
Cellular

Rooftop donor antennas

Donor antennas fixed to the rooftop plant enclosure.

Four mobile repeater units wired into a basement plant room wall
Cellular and electrical

Multi-carrier repeater wall

Four mobile repeater units wired into a basement plant room wall.

News and notes

Short write-ups from the field for the people who look after vessels and buildings.

  1. Why mobile signal drops out in basements, and how a repeater fixes it

    Concrete and steel block carrier signal. A donor antenna and repeater bring it back inside.

    Cellular

  2. What a class calibration certificate covers

    What surveyors check, what we test, and how to keep the gap between surveys short.

    Marine

  3. What ISO 45001 means when we work on your site

    The safety checks you will see from our crew before a single cable is pulled.

    Company

Tell us about the job

A vessel's automation or control system has a fault, a building with no signal, or a new install to price. Send the details and we will come back to you with next steps.

Office
Level 2/8-10 King Street (Regus Building)
Rockdale NSW 2216

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