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Astir Associates
Leon Monastirski cover
Leon Monastirski

Leon Monastirski

Principal / Founding Principal Astir Associates

Sydney, NSW
Contact us

About Leon

Leon Monastirski is the founding principal of a distinguished legal and accounting practice established in 2003 in New South Wales. With over 25 years of experience, Leon's career began in Melbourne, where he built a foundation in both legal and financial domains. His journey saw him transitioning from key roles in major financial institutions to leading a private practice, before relocating to Sydney during the 2000 Olympic Games. Here, he played a pivotal role at a nationally respected professional services firm before venturing to establish his own firm. Leon is renowned for his multifaceted expertise spanning accounting, taxation advisory, corporate and commercial law, as well as property law. His client portfolio is diverse, including prominent national and multinational corporations, significant industry players, and high-net-worth individuals. He offers adept guidance on business advisory, tax planning, and superannuation fund audits, alongside strategic advice in criminal and family law matters. His proficiency also extends to conveyancing, personal injury cases, debt recovery, estate planning, and alternative dispute resolution. Having held significant managerial positions, Leon brings a wealth of experience from previous roles like Litigation Services Manager, Business Services Manager, and Principal at various esteemed firms. His educational background is equally impressive, holding a Master of Laws from The Australian National University and a Bachelor of Laws from Macquarie University, alongside a CPA from Deakin University. Leon’s comprehensive understanding of both the legal and accounting sectors enables him to provide holistic and strategic solutions tailored to meet the nuanced needs of his clients.

Practice areas

Commercial Law
Criminal & Traffic
Employment Law
Estate Planning
Family Law
Litigation & Disputes
Personal Injury
Property Law

Resume

Experience

Principal

Principal

ASTIR ASSOCIATES Certified Practising Accountants & Lawyers

Oct 2003 - Present • 23 years

Business Services Manager

Business Services Manager

WEARNE & CO. Chartered Accountants & Business Advisors

Jan 2001 - Jul 2003 • 2 years 6 months

Litigation Services Manager (Contract Position)

Litigation Services Manager (Contract Position)

GREEN PENKLIS & LAWSON Chartered Accountants

Oct 2000 - Jan 2001 • 3 months

Principal

Principal

MONASTIRSKI & CO. Certified Practising Accountants

Jun 1990 - Sep 2000 • 10 years 3 months

Financial Planner

Financial Planner

CAPITA FINANCIAL GROUP LTD.

Mar 1989 - May 1990 • 1 year 2 months

Trainee Accountant

Trainee Accountant

I.O.O.F. OF VICTORIA

May 1988 - Mar 1989 • 10 months

Real Estate Agent

Real Estate Agent

STOCKDALE & LEGGO Real Estate

Nov 1987 - May 1988 • 6 months

Education

Master of Laws (LLM), Legal Practice

Master of Laws (LLM), Legal Practice

The Australian National University

2003 - 2006

Bachelor of Laws (LLB), Law

Bachelor of Laws (LLB), Law

Macquarie University

1999 - 2003

CPA Program, Post-Graduate Program

CPA Program, Post-Graduate Program

Deakin University

1996 - 1999

Bachelor of Commerce (BCom), Accounting & Commercial Law

Bachelor of Commerce (BCom), Accounting & Commercial Law

Deakin University

1993

Diploma of Business, Accounting and Business/Management

Diploma of Business, Accounting and Business/Management

Swinburne University of Technology

1986

Contact information

Sydney, NSW

Level 1, 299 Elizabeth Street, Sydney, NSWWebsite

Practice certificate

Name
Leon Monastirski
Date of admission
2004
Certification type
Principal of a law practice
Class
Law Practice
Region
NSW

Last checked: 9 Jul 2026 • Checked with Law Society of NSW

Practice areas

Commercial Law
  • Company Secretarial
  • Superannuation
  • Tax Law
Criminal & Traffic
  • Criminal Law
Employment Law
  • Workers Compensation
Estate Planning
  • Probate
  • Wills and Estates
Family Law
    Litigation & Disputes
    • Debt Recovery
    Personal Injury
      Property Law
      • Conveyancing
      • Leases