top of page

A Sydney Firm

Born and bred in Sydney, Mark brings a typically Sydney focused approach to his work. 

“It is always about getting the best result possible for the client while staying real irrespective of the circumstances.”

Sydney Firm


From his earliest memory, the law has been part and parcel of Mark Sheller's life.  He was born shortly after his father, the Hon Simon Sheller AO QC, started his career at the New South Wales Bar and witnessed the hard work, the discipline and finally, but not insignificantly, the importance of the legal profession's contribution to society, particularly the society in which Mark grew up.

Becoming a lawyer proved irresistible to Mark and his brother, James. 

Since his admission in 1986, Mark has forged his own successful career as a solicitor.  Over thirty years he learnt his craft from lawyers widely regarded as the best in their fields.  That career now finds its voice in a boutique firm based in Sydney, steeped in traditional roots, practicing the flexibility of the twenty-first century while holding dear the ethical responsibilities which being a very proud lawyer demand.



Practicing law in the twenty first century requires flexibility in approach and thinking.  Mark’s practice style is to meet the client and the client’s needs on the client’s terms. 


With the miracle of Artificial Intelligence and the opportunities which it offers, becoming more and more part of the legal landscape, the new traditions of practising as a lawyer are being forged now. 


The measure of intelligence is the ability to change.” Albert Einstein



Mark Sheller embraces the philosophy of givers' gain and looks forward to the opportunity of helping others who are less fortunate than him.


“It is not how much we give, but how much we put into giving.” Mother Teresa'



Sheller is a law firm built upon an unshakeable foundation of high values and ethics.  This foundation is the benchmark for every step forward which Sheller takes. 

 “Laws and principles are not for the times when there is no temptation; they are for such moments as this, when body and soul rise in mutiny against their rigour… if at my convenience I might breach them, what would be their worth?” Charlotte Bronte, Jane Eyre




Tony Cope


Risk Advisory Services

We have recommended Mark to a number of our clients and would happily recommend him again.  He has always assisted them to resolved their indemnity issues in an efficient and cost effective way.


Karina Rodriguez Diaz

Crisis Management Underwriter 

HDI Global SE

Mark has assisted me in drafting the key policy wording.  Notwithstanding the challenges which this exercise presented, Mark drafted a fantastic wording and did so in a way which involved me in every step ensuring that I understood what he was doing as it unfolded.


Paul Gordon

Corporate Council

Red Bubble

I have sought Mark's advice on a number of occasions to resolve various indemnity disputes which we have had.  I have always found him to be responsive, clear in his advice and effective in resolving the disputes.

bottom of page