Our Professional Staff

SONYA TEERMAN - Principal (BA. LLB.)

Sonya acts in claims relating to the coal mining industry for the Western & Southern coal miners and will maintain the same excellent and expedient service that Barry F Cosier & Associates has been proud to provide previously.

Sonya has extensive legal experience in workers compensation and personal injury matters, for both the workers and for the insurers. Sonya started her career as a paralegal with Zurich Insurance in the workers’ Compensation claims department. Sonya has worked for several large firms including, G H Healey & Co, Pieterse & Pieterse in Sydney which was a firm that specialised in Workers Compensation and Common Law matters on behalf of insurers and self insurers including Mayne Nickless and several local councils. Sonya was an Associate with Matthews Dooley & Gibson, solicitors who provide extensive legal services to a vast area of Western Sydney.

By virtue of her expertise, Sonya has an extensive practice in Family Law and Criminal Law matters, so as to cater for such needs for the members and their families. Sonya appreciates the sensitivity and individual differences in family law matters and seeks to minimise stress which is an inevitable consequence in these matters. Sonya ensures that these matters are dealt with as expeditiously as possible and engages in alternative dispute resolution wherever possible. Sonya has many years of family law experience, but has as indicated earlier carried high volumes of personal injury cases before she joined our firm.

Sonya provides advice in respect to the following:

  • Liquor law including hotel and restaurant transfers, liquor licensing disputes
  • Purchase and Sale of Business
  • Commercial Leases and disputes
  • District Court claims
  • Supreme claims in both Common Law and Equity
  • Land and Environment Court disputes
  • Divorce Applications.
  • Family Law Property matters
  • De facto relationship matters
  • Children’s issues
  • Pre-nuptial and Lifestyle agreements
  • Termination Agreements
  • Guardianship
  • Family Provision Act matters
  • Wills and Probate and Administration
  • Domestic violence matters
  • Civil matters
  • Criminal law matters



Barbara is an experienced Property Lawyer, admitted into the Supreme Court of New South Wales in 2003. Her legal career is backed by a broad range of experience in marketing, real estate, strata management and paralegal roles. It is this experience that stirred her desire to study law and specialise in the area of property law.

With extensive knowledge in all aspects of property law, and a proven ability to provide diligent, thorough advice, Barbara is a dedicated expert valued by all her clients.

Barbara’s areas of practice include residential, commercial and rural Conveyancing, Strata law, Retirement Village Law, Mortgage and Securities.

With an outgoing personality and quirky sense of humour, Barbara endears herself to her clients whilst carefully understanding their needs. She prides herself on delivering exceptional legal advice in a professional yet relatable manner. With her personable and friendly nature, Barbara’s clients know they are in good hands.

Nicole Stevenson - Solicitor

DipLaw (LPAB)
Grad Dip Leg. Prac. BN

Nicole's legal career is backed by a broad range of experience in the following areas of practice:

Commercial Law
Wills, Probate & Estate Planning
Property Law