Lawyers Profiles
Olga PROSYANYUK Managing Partner, AVER LEX Attorneys at law. Attorney-at-law, Candidate of Legal Sciences, Member of the Disciplinary Chamber of the Kiev City Qualification and Disciplinary Bar Commission of Ukraine, Board Member of the UBA.


Academy of Advocacy of Ukraine (2004), V.M. Koretsky Institute of State and Law of the National Academy of Sciences of Ukraine (2013), Candidate of Legal Sciences.

Professional experience:

Olga Prosyanyuk is experienced in successfully representing and defending the interests of her clients at corporate, administrative and criminal cases in national and international judicial authorities. She takes part in several high-profile cases involving the State of Ukraine, famous political figures and large business corporations, develops efficient algorithms for protection of property rights and interests of a client, defenses in criminal proceedings, takes part in consulting and carrying out expert evaluations of various commercial projects and analysis of legislation. Ms. Prosyanyuk is involved in active research: she is the author of more than 100 works published in leading trade journals. Moreover, she participates in social projects. As consistent with research 50 Leading Law Firms of Ukraine 2014, 2013 Olga Prosyanyuk received an award as the leading litigation lawyer and lawyer of criminal cases. According to the all-Ukrainian independent public rating Attorney of 2013, Olga was among the best five attorneys. In 2013 and 2014 Olga was rated by Ukrainian Law Firms 2013. A Handbook for Foreign Clients as the one of the best in the fields of litigation and criminal law/business crime. In 2011 Olga Prosyanyuk won in The Best Trial Lawyer nomination of Legal Award 2011.


Practice Areas:

White-Collar Crime, Litigation, Corporate Law


Languages: Ukrainian, Russian, English

Olga PROSYANYUK is a notable practitioner in

Criminal Law/ Business Crime


AVER LEX Attorneys at law

2-A Mykoly Gaytsana Street, 5th Floor,
Kiev, 01010, Ukraine
+380 44 300 1151
+380 44 300 1153

AVER LEX Attorneys at law is a highly proficient Ukrainian white collar criminal defense boutique founded by the famous Ukrainian lawyers Olga Prosyanyuk and Vitaliy Serdyuk. In 2012 they formed a powerful team of professionals with a great experience, broad knowledge, a constant desire to develop as well as a high level of responsibility and self-devotion. Thanks to common efforts and common decisions the reputation of the company was created and three key directions were identified: criminal law, litigation and taxation. Now, the AVER LEX team consists of 5 partners and 25 professionals in the law sphere.

At the beginning of the company's activity we discovered the notable advantages of the a narrow specialization. Such advantages remains significant taking into account the growing number of clients. Taking into consideration the specificity of all three practices, professionals are are working with problems at maximum focus, without been distracted by unnecessary things, and respond quickly to resolving complicated and controversial situations. But the uniqueness of projects lies in the fact that the certain experience of every member of the team is used for examining certain details of a problem.

Our clients can always count on unique strategic decisions, a real result, confidentiality, and an individual approach to every single client. That is why leading national companies, domestic and foreign individual investors, well-known business and political figures entrust the problematic issues to our specialists. The reason is that we just know the secret of long-lasting partnership relations!

Special emphasis has always been put on enhancing the criminal practice, development of efficient and effective defense strategies as protection from illegal revisions by the controlling and law-enforcement bodies according to business specificity, their negative consequences, raider seizures, pressure from law-enforcement bodies through searches, arrests and persecution, etc.

We are continuously working on strengthening our position in the legal market from year to year. Advocates of the company have held high-ranking positions in Ukrainian professional ratings of the Ukrainian ratings for many times or repeatedly, partners are recognized among the leaders in the criminal and court spheres, and the company is among TOP-50 leading law firms of Ukraine for several years in a row, year by year improving the results and holding leading positions in the criminal sphere.

Clients and colleagues know our values and constantly experience the impact of such values to communication and work results. There is nothing impossible for us and we always know what we want! That is motivation which is moving us forward!