Mari Matjus

+372 610 8033
+372 5620 8625

Competition Law
Data Protection
Medical Law
Mergers and Acquisitions (M&A) and Corporate Law
General Contract Law


Attorney-at-law Mari Matjus’s experience in the field of data protection, healthcare and competition law allows NOVE’s customers to prevent disputes. Mari focuses on the rules governing the activities of an entrepreneur and her timely and accurate advice can prevent a long and debilitating dispute.

In the wake of entry into force of the General Data Protection Regulation (GDPR), Mari conducts data protection audits and drafts impact assessments and privacy policies; helps keep record of processing activities and conclude data processing agreements between data controllers and processors; compiles and communicates internal data protection rules in companies; supplements employment and service provision agreements.

In the heavily regulated sector of healthcare, Mari has a long track record of helping clients stay compliant with the complex regulatory framework. Mari has advised institutions of stationary and ambulatory medical treatment, international pharmaceutical corporations, merchants of medical devices, clinical research organisations and umbrella organisations in medical sector.

Mari has 10 years of experience in EU and Estonian competition law, advising clients in merger control, supply, sales and cooperation agreements, and on business restrictions of dominant undertakings.

Mari holds a Master’s degree in law from University of Oxford, in addition to Master’s degree from Tartu University. At Oxford, Mari focused on medical, competition and EU law. She has worked in London headquarters of a global law firm, in a larger pan-Baltic law firm as head of practice area, as well as in a smaller boutique law firm as partner.

In additon to legal practice, Mari has read competition law to Master programme students of Tartu University for 5 years. She is a member of management board of Oxford and Cambridge alumni organisation in Estonia and a member of supervisory board of the charity foundation supporting the activities of the top competence centre of neurological rehabilitation in Estonia, Haapsalu Neorological Rehabilitation Centre.

Work experience

2018–... Law Office NOVE, Attorney-at-law, Partner
2015–2018 Law Office Jesse & Kalaus, Attorney-at-law, Partner
2013–... University of Tartu, Lecturer of Competition Law
2012 Law Office Holman Fenwick Willan, London
2011 Georgetown University, Teaching Assistant, summer programme
2010-2015 Law Office SORAINEN, Lawyer, Attorney-at-law, Head of Medical and Life Sciences


2011-2012 University of Oxford, Master of Laws (Magister Juris)
2009-2011 University of Tartu, Master of Laws (MA) cum laude
2006-2009 University of Tartu, Bachelor’s Degree in Law (BA) cum laude
2008 Georgetown University summer programme „American Institute on Political and Economic Systems“


Estonian, English


Estonian Bar Association
Oxford & Cambridge Club Estonia, member of the board
Haapsalu Neuroloogilise Rehabilitatsioonikeskuse Toetusfond SA, member of the council

Scientific publications

Matjus, M., Haamer, M. eHealth. Under What Conditions Can A Patient’s Health Data Be Forwarded To Another EU Member State? Juridica 2014, nr 5, pg 361-373


Rangemad alkoholipiirangud on õigustatud. Eesti Päevaleht, 02.02.2016
Patsiendi terviseandmete edastamisel teise ELi riiki on tähtis teada erisusi riigiti., 17.11.2014
Koostööklaster tõi kokku advokaadid ja raviasutused. Meditsiiniuudised, 07.02.2014
Lubatu ja keelatu ähmane piir. Postimees, 31.07.2013
Kuidas püsida konkurentsis seadust rikkumata? E24, 08.06.2013
Kindlat müügihinda ei saa nõuda!, 06.06.2013
Kas arst võib ravida teadvusetut patsienti? Meditsiiniuudised, 05.02.2013
Riigiabi – ohtlik tont või «elu võimalus»? E24, 27.01.2013
10 näpunäidet kuidas riigiabi probleeme ennetada. Äripäev, 26.01.2013
Ettevõtja, hoolitse ise, et riigiabi oleks seaduslik. Äripäev, 26.01.2013
Assessment of non-horizontal mergers in Estonia, European Competition Law Review, 16.12.2010