Mark was admitted as a Solicitor in 1981 after obtaining his Bachelor of Laws from the University of Queensland. Mark began practising in Gladstone, moving to Noosa in 1981 where he and Glyn Tebbett established the firm Tebbett & Ostwald Solicitors.Mark practises almost exclusively in Succession Law, involving Wills, Enduring Powers of Attorney and the administration of estates.
Mark also deals with the more complex areas of estate planning and matters involving complicated family arrangements and Testamentary Trusts. Mark obtained his Specialist Accreditation in Succession Law in 2003. He is one of only two Accredited Specialists in Succession Law on the Sunshine Coast.Over the years Mark has been involved in the administration of many estates either as an executor/trustee himself or in his position as Solicitor for personal representatives. Further, Mark has acted for many different parties in the litigation of contested estates or associated trust matters.