Mark Diamond

Senior Associate

Mark Diamond is a Senior Associate at Hall Payne, working in Sydney’s employment and industrial relations team. He is admitted to both the Supreme Court of NSW and the High Court of Australia and is an Accredited Mediator.

During his career, Mark has had carriage of or been involved in hundreds of employment and industrial matters including, but not limited to, unfair dismissals, general protections, bullying & harassment, disciplinary processes, redundancies, underpayments, protected action ballots, suspensions of industrial action, disputes under enterprise agreements, union rule changes, and has even run appeals as an advocate before the Full Bench of Fair Work Commission.

Mark joined Hall Payne having worked for the Australian Rail, Tram and Bus Industry Union (RTBU), first as its National Lawyer before ascending to serve as its National Secretary. His time at the RTBU was characterised by significant legal work as well as contributions to the union's activities, advocacy for workers' rights, and changes he pursued in the industries in which the RTBU operates.

Mark has served on various boards, including the Jobs and Skills Council for the Transport and Logistics industry, a harm prevention charity for the rail industry, and the Australian Council of Trade Unions (ACTU) Executive.

“I joined Hall Payne because it is the firm best placed to service the employment and industrial needs of Australian workers as well as meet the legal needs of the Australian union movement nationally”

Outside of work, Mark maintains a private life.

Reviews for Hall Payne Sydney

24 Nov 2025  Google Alison G

I cannot recommend Hall Payne Lawyers highly enough. Leanne Tacey and Luke Forsyth managed my case with great confidence. They kept me updated throughout the process and consistently fought for the best outcome on my behalf. Leanne's extensive experience and strategic approach led to a result for which I am truly grateful.

I strongly encourage anyone dealing with an employer who is acting unfairly or unethically to seek their guidance early in the process.

19 Nov 2025  Google Rhiannon B

Worked with Hall and Payne on a complicated case ~ from start to finish Joe Kennedy was knowledgeable, reasonable, calm and helpful. I cannot tell you what comfort he and his team Alex and Hannah were for me during an incredibly difficult and uncertain time.

Above the knowledge what they really gave a sense of was that they wanted to get me the best possible outcome for my situation.

I could not recommend them highly enough.

16 Jul 2025  Google CMcare

I had an exceptional experience with hall Payne Lawyers, and in particular, with Ignat. He supported me through a very complex matter with the Nursing and Midwifery Council.

His professionalism, calm guidance, and in-depth legal expertise gave me confidence every step of the way. Ignat’s advice was always clear, honest, and strategic, and I felt genuinely supported throughout the entire process.

I am incredibly grateful for his help and would highly recommend him to anyone needing expert legal representation in professional or regulatory matters.

10 Jun 2025  Google Peter S

They helped me solve my matter without needing to go to a hearing. They helped me in getting a government agency to offer an unconditional settlement in my favour.

22 May 2025  Google Matthew L

5-star rating

19 Dec 2024  Google Gemma V

Whilst seeking legal advice from Ignat Kozlov, we could not fault our experience. Ignat and his team were very professional, understanding and gave thorough advice.

Highly recommend the team at Hall Payne Lawyers.

18 Dec 2024  Google ldslm

We are incredibly grateful for the thorough advice and diligent work provided by Ignat Kozlov at Hall Payne Lawyers. Despite external challenges, he consistently delivered exceptional service.

Ignat and his team demonstrated a level of care and professionalism that is second to none. They turned a challenging process into a positive experience and have our highest recommendation for their outstanding expertise and dedication.

04 Dec 2024  Google Kym B
Excellent support, and dedication from start to finish. Recommend to anyone.

More Reviews 

Recent Blogs by Mark

What is a class action and is it right for your legal case?

What is a class action and is it right for your legal case?

Are you part of a group of people who have experienced harm or wrongdoing from the same source and that may entitle you to compensation? If so, a class action could be the perfect way to seek justice without the financial burden or risk of taking on the case individually.

Read more

Make a without prejudice offer to settle a dispute with your employer

Make a without prejudice offer to settle a dispute with your employer

If an employee wants to shortcut the workplace disciplinary process, or they’re having a tough time at work and want to look at negotiating an exit, they can consider making a ‘without prejudice’ offer to settle the dispute by offering to resign in return for a settlement payout.

Read more

More Blogs From Mark