Ned’s considerable experience in the construction industry before coming to the law makes him a formidable opponent for any building dispute.
Ned Mortensen
Principal Solicitor
Accredited Adjudicator (Security of Payment)

Ned Mortensen is a building dispute resolution and security of payment law expert. He assists builders, subcontractors, developers and home owners across New South Wales to negotiate, administer and enforce Construction Contracts and Residential Building Contracts.

Ned is a senior member of the Commercial Litigation Team and Building and Construction Law teams. He practices in general litigation, commercial law, as well as company insolvency and restructuring matters.

Specialist Construction Industry Knowledge

Ned has specialist knowledge of the building and construction industry, having come to the legal profession after twenty years of working in the construction industry.

Ned’s experience in the construction industry ranges from residential housing in his early career, through to engineering and senior project management roles for some of Australia’s top tier contractors.

Ned has project managed contracts for the construction of commercial and infrastructure projects with individual contract values exceeding $200 million.

Ned has also worked extensively in client side project management, where he routinely handled disputes concerning the quality, timeliness, compliance and value of works. He is an experienced building consultant, and has appeared as an expert witness in building litigation matters.

Ned’s unique mix of legal skills and practical construction industry experience allow him a clear insight into the often very technical issues that are at the heart of many building disputes. His legal expertise and construction industry experience give him an edge that puts him at ease in any construction industry matter and ensures a sound and practical understanding of the technical issues at play.

Ned has always been very prompt in all his communication and he always explained things in an easy manner.

I was in trouble with my builder Ajit Construction. In 20 months the builder only did slabs of my house and was giving excuses every week. I engaged Ned who helped me in getting my contract terminated with Ajit Construction. He provided all the options to me so I could take required decesion.  Finally I engaged a new builder who took my job. I was so impressed with Ned’s deep knowledge that I referred him to all the clients of Ajit who were struggling with Ajit. Again thanks to Ned for bringing me out of the wood.

Amit Kumar Govil

We could not fault our experience with Roberts Crosbie Mortensen Lawyers and would recommend them without hesitation.

“We are absolutely thrilled with the result Roberts Crosbie Mortensen Lawyers achieved for our company! After a long battle over a very large sum of money, Ned achieved the best possible outcome for us. He was incredibly professional, while at the same time extremely patient and easy to talk to.”

Angela Whitney-Offen

Highly recommend this firm to anyone seeking legal services.

“Ned assisted me with my matter, he was very helpful and professional throughout the whole process.”

Kris Grozdanovski

Ned always places his client’s best interests first.

“His focus on developing long term relationships, coupled with his industry and business experience, delivers great results for his clients.”

Ned handled our matter as if it was his own. His prompt assistance and excellent advice were very much appreciated.

Ned speaks and understands the language of our industry.

We strongly recommend Ned and his team to anybody requiring a Litigation Lawyer.

“My wife and I operate a small earth moving business and required legal assistance in relation to a machine purchase gone wrong. We engaged Roberts Crosbie Mortensen to represent us in our dispute. Ned Mortensen took up the charge for us in what was for us a personally difficult situation. Ned is extremely professional and engaging he put my mind at ease on more than one occasion throughout the process. Ned has a very direct, no nonsense approach but also allows plenty of room to bounce ideas around. We had very positive outcome.”

Matt Cresham

Areas of Law

Who Ned works with

Ned works with builders and civil works contractors, property developers, clients of residential and commercial builders, construction industry professionals, individuals and companies that have suffered loss or damage through the carelessness of others, business owners and insolvency practitioners.


Most often, I find that the Issues in commercial litigation will cross many academic disciplines. Good lawyers don’t just follow the herd, but must think outside of the square and draw on multidisciplinary skills to arrive at the best outcome for their clients.

I encourage my clients to be more proactive in their approach to business procedures so that they can minimise problems and waste less time and money on reactive remedies. I believe that an ounce of prevention is worth a pound of cure.

Security of Payment Guide

Get Paid. When it matters most. The essential tool for every business owner in the building and construction industry.

A Home Builder’s Guide to Resolving Disputes in NCAT

An essential Guide to help Home Builders develop a robust defence and achieve a more favourable outcome in an NCAT dispute. Don’t get caught out; get the right advice and get it fast.


Ned holds bachelor degrees in both Law and Construction Management, as well as a Graduate Diploma in Legal Practice.

Ned is also an adjudicator appointed by Adjudicate Today and ABC Dispute Resolution Service for adjudication applications made pursuant to the Building and Construction Industry Security of Payment Act 1999.

He is a licensed builder, and also a Building Professionals Board Accredited Certifier.

Ned is admitted as a Solicitor of the Supreme Court of New South Wales and the High Court of Australia.



Ned enjoys sailing and winter snow sports, and is an ex player and avid follower of both rugby union and rugby league. He holds an unrestricted commercial pilots license, and enjoys recreational flying when he has the time. A dedicated father of three, he enjoys spending time with his kids.


Meet Our Team

Our Specialist Lawyers include
3 Accredited Specialists in Commercial Litigation, 1 Accredited Specialist in Business Law and an Accredited Adjudicator under Security of Payment Laws.

We are a leading specialist business and litigation law firm delivering accessible big firm expertise with a personal client experience that is first class.

Our People
Law Society Accredited Specialists
99 %
More Accredited Specialists in Commercial Litigation than 99% of all law firms in NSW