Meet The Partners…

In July 2014, a partnership was formed between Peter, Michael Grogan, and Sam Wright, who were long-term members of the team prior to becoming partners.
Michael and Sam share the same passion for empowering business owners and are immensely proud to carry on the values and mission of the practice.

Originally from Sydney, Peter started his business in 1985. Prior to this Peter was the Group CFO and Company Secretary for the international shipping group Wilh Wilhemsen. In 1988, Peter relocated to Toowoomba and expanded the client base in the Darling Downs.

As an accountant for over 38 years, Peter has been the driving force behind the business as it has continued to develop and adapt to clients needs. He places a high value on having a great team culture. With a Bachelor of Arts (Economics and History) and a Master of Commerce (Accounting), Peter is a Certified Practising Accountant and Registered Tax Agent. Peter is a Gazelles Internationally trained coach. Member of AICD. Peter also serves on a business-mentoring panel for Queensland State Development.

Peter is married to Vivienne and has seven children and three and half grandchildren. Peter loves to ride his mountain bike on the dirt tracks north of Toowoomba. He and Vivienne love going to West End and enjoying riding around the river, the cafes, plays at QPAC and a visit to Bent Books. Peter is an avid reader and a cricket tragic.


Peter Ambrosiussen


Michael Grogan



Michael is a qualified accountant who works with our Strategic Business and Compliance clients. Michael started with Ambrosiussen Accountants as a scholarship student in August 2003.

He commenced full-time employment in November 2004 after completing a Bachelor of Accounting. Michael became a junior partner at Ambrosiussen Accountants in July 2014.

In his spare time Michael enjoys relaxing in the outdoors, camping in the bush, fresh water fishing and watching the cricket in the summer.


Sam is an accountant and focuses on both compliance and Business Edge work. He has been a valuable member of the Ambrosiussen team since May 2007. Sam has worked his way from completing work experience at Ambrosiussen Accountants & Advisors, to now proudly being a junior partner. Working at Ambrosiussen Accountants has provided him with a very practical view of his chosen career as an Accountant.

Sam is nearing completion of the CPA program, having already completed a dual Bachelor Degree of Business and Commerce, majoring in Accounting, Finance, and Human Resource Management and graduating with distinction. Sam is committed to the strengthening and development of small business by improving the lifestyle of clients, not just the bottom line.

Sam enjoys networking immensely and volunteering his time in community organisations like the Toowoomba Chamber of Commerce, Toowoomba: The Education Capital and the Carnival of Flowers. On a personal level, Sam enjoys playing golf, spending time with his wife, cooking (and eating) and supporting the Brisbane Broncos.


Samuel (Sam) Wright


Emma Wieden


Emma joined the team after over six years experience at a public accounting firm. She has completed her Bachelor of Commerce and will finish her CPA studies by the end of this year. Emma is excited to be working with the range of clients at Ambrosiussens, particularly assisting with their tax compliance and planning.

Emma grew up in Crows Nest, attended high school at St Ursula’s and moved to Toowoomba once she started university. Outside of work Emma teaches dance classes and enjoys spending time with her husband, extended family and her two dogs. She is currently on maternity leave with her first child, and will be back in mid August.



Tania joined the team at Ambrosiussen Accountants in March of 2016. She completed her Bachelor of Commerce degree majoring in Accounting and Finance at USQ Toowoomba. Following completion of her studies she returned home to Roma to work in a public accounting firm for 7 years. From there she went onto running a family earthmoving business in Condamine. In 2015 she decided to move to Toowoomba for her children’s schooling and go back into accounting where he passion is. Tania is currently also completing her CPA.

When she is not working she is spending time with her four children and husband. If there is ever a spare moment she enjoys gardening.


Tania Collie

Administration Professional

Jen Morris




Jen joined the Ambrosiussen Team in November 2015 as part of the Administration Team.

She completed her Cert IV in Business Administration/Finance in December 2016. Jen is originally from Canada and moved to Australia in 2012 with her husband Chad, and her two sons Ryden and Damon.



Susie joined the team at Ambrosiussen Accountants in 2004 as our trainee Receptionist.

She completed her Certificate 3 in Business Administration. Susie then stayed with the firm for a further 7 years as her role expanded to Administration/Finance Manager. Susie then commenced maternity leave March 2011 impending the arrival of her first son Darius in April. In February 2013 she then welcomed her second son Declan. Currently, she is on maternity leave with her third child, Maddison.

Although she thoroughly enjoys her very energetic children she returns to work January 2016 as our part-time Administration/Executive Assistant to the two new partners Michael Grogan & Sam Wright.

Administration Professional

Susie Campbell



Jim’s Jerky


Terry Fowler Mechanical


Barry Sharp

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