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Mobile Welding, Custom Fabrication + CLS Pipe Supply Across New Zealand

Call : 021 866 487

Olsen Welding Limited

About Us

Olsen Welding has been proudly operating in New Zealand for 26 years, having established the business in 2000. We specialise in pump stations, water and wastewater infrastructure, gas pipeline welding, emergency repairs and the upgrading and maintenance of the Greater Auckland networks.

Our capabilities also extend to structural steelwork, piling works and certified welding services to ASME Section IX and AS/NZS 1554 standards.

With more than 25 years of industry experience, our family-owned and operated business is committed to delivering quality workmanship, reliable project outcomes and practical solutions across the civil, water, wastewater, gas and construction sectors.

What We Do

Since 2000, Olsen Welding has been committed to providing our clients with a high level of service and quality workmanship across the construction, civil and infrastructure industries.

Building and maintaining strong, long-term relationships with our clients is at the heart of what we do. As a family-owned and operated business, we take pride in understanding our clients’ needs and delivering practical, reliable solutions.

We take a proactive approach to every project, with a strong focus on quality, safety and reliable delivery. By getting these fundamentals right, we provide our clients with confidence and peace of mind that their project is in capable hands.

Our Services

Our services range from, but are not limited to:

  • Licensed Sintakote Licensee & Supplier
  • CLS Pipelines and Pump Stations
  • CLS and Concrete-Lined Steel Pipe
  • Emergency Water and Sewer Works
  • Structural Steelwork
  • Manufacture and Installation of Fabricated Pipe Fittings
  • Piling Works
  • Supply and Installation of Pipe
  • Corrosion Protection
  • Certified Welding Services to ASME Section IX and AS/NZS 1554 standards
  • Pipeline Repairs, Maintenance and Tie-ins
  • Workshop Fabrication and On-Site Welding

Why Us?

Focus on Safety

  • Safety-First Culture — Strong health and safety systems with dedicated in-house support.
  • Regular Safety Communication — Weekly toolbox meetings, safety briefings and Health & Safety Committee meetings.
  • Trained Workforce — Team members trained in Site Safe, ConstructSafe, Confined Space, Loads & Slings and First Aid.
  • Industry Pre-Qualifications — Tōtika pre-qualified and Safe365 Premium Partner Program member.
  • Ongoing Training & Investment — Continued investment in training, equipment and safety systems.
  • Proactive Risk Management — Strong focus on hazard identification, worker wellbeing, environmental responsibility and continuous improvement.
  • Competent & Equipped Team — Ensuring our people have the training, competency and equipment required to work safely and effectively.

Our Strengths

  • NZ Family-Owned & Operated — Proudly family-owned and operated since 2000.
  • 25+ Years’ Experience — Extensive experience across welding, fabrication, pipelines, water, wastewater and civil infrastructure.
  • Skilled Workforce — Highly experienced team with the knowledge and capability to deliver complex projects.
  • Quality & Safety Focused — Strong commitment to quality workmanship, safety and compliance.
  • End-to-End Capability — Workshop fabrication, pipe and fittings, site welding, installation, repairs and maintenance.
  • Reliable Project Delivery — Responsive, flexible and committed to meeting project requirements and deadlines.
  • Strong QA/QC Systems — Traceability, quality control, inspection and compliance processes.
  • Trusted Relationships — Building long-term client relationships through reliability, communication and delivering on our commitments.

Real Values

Respect | Energy & Effort | Attitude | Leadership

Respect

  • Treat everyone with fairness, honesty and integrity.
  • Build strong relationships with our people, clients and communities.
  • Respect our history and the foundations our business was built on.

Energy & Effort

  • Set high standards and take pride in our work.
  • Give our best every day and deliver on our commitments.
  • Take ownership, embrace challenges and continually improve.

Attitude

  • Approach challenges with a positive, solutions-focused mindset.
  • Support each other and encourage teamwork.
  • Invest in our people through training, coaching and opportunity.
  • Take pride in our work and our communities.

Leadership

  • Lead by example and take accountability.
  • Empower our people to grow and succeed.
  • Make decisions with integrity and stand behind them.
  • Create opportunities for our people, business and communities.

Our Projects

  • 2022 Marchcato Rosedale wastewater pump station upgrade
  • 2022 Marchcato Castor Bay wastewater pump station upgrade
  • 2020/ 2021 Marchcato Silverdale/Milldale Orewa No 2 500 diameter CLS pipeline installation
  • 2021 Fulton Hogan Hibiscus 500 diameter Booster Pump Station
  • 2021 Marchcato Huia No 1 upgrade 900 diameter CLS pipeline
  • 2021 Marchcato 500 diameter CLS upgrade Papakura
  • 2020 Fletcher Construction Hobsonville wastewater pump station installation
  • 2020 Marchcato Waikato 50 Tuakau pump station installation
  • 2019/ 2020 Brain Perries North Harbour no 2 1200 diameter CLS installation

John Olsen : Managing Director

Managing director, John served his time as a boilermaker and has been involved in the construction industry for 40 years. John has work experience around the globe, being involved with petrochemical industries, mining, structural construction, water, wastewater pipeline and pump station upgrades. A family-operated business, John’s personal priority and commitment is to maintain the personal wellbeing and safety of all team members. All Olsen Welding Senior Welders are highly skilled to ASME9 and ASNZS1554 standards.

  • Boilermaker welder apprenticeship
  • Watercare health & safety inducted
  • Confined space ticket
  • Qualified Welder ASME9 and ASNZS1554

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