Ihor Andrieiev is a Ukrainian attorney at law, the founder and managing partner of KAIZEN, Chairman of UNBA NextGen — the youth committee of the Ukrainian National Bar Association — and a member of the Council of the UNBA Committee on the Protection of Victims of Armed Aggression. He heads the firm’s criminal law and military law practices and acts for business owners, executives and servicemen in the areas where criminal, administrative and mobilisation law now intersect.

Professional Experience

• Attorney at law since 5 October 2020, admitted by decision of the Bar Council of the City of Kyiv.
• Founder and managing partner of Attorneys’ Association “KAIZEN”, established in 2022, with offices in Kyiv and Odesa; head of the firm’s criminal law and military law practices.
• Chairman of UNBA NextGen since 2025 — the youth committee of the Ukrainian National Bar Association, a standing collegial advisory body created by decision of the Bar Council of Ukraine No. 94 of 2 June 2018. The committee integrates attorneys under 40 into bar self-governance, develops mentoring and professional-development programmes and maintains regional representations across Ukraine.
• Member of the Council of the Committee of the Ukrainian National Bar Association on the Protection of Victims of Armed Aggression against Ukraine, Compensation Mechanisms and European-Integration Legal Support of Recovery.
• One of the first attorneys to join the UNBA “Advocate+” project — the provision of legal assistance to servicemen directly at their units, including in the combat zone. Assigned as the attorney responsible for the 79th Brigade. Takes part in translating individual complaints from the front line into proposals for systemic changes to state procedures.
• Organiser and speaker of numerous professional events for young attorneys — training sessions, workshops and regional programmes run within the framework of the UNBA.
• Speaker and panellist at leading professional events, in particular: the X International Business Protection Forum (2025, organised by Yurydychna Praktyka), where KAIZEN acted as industry partner and he spoke on the pressure exerted by law-enforcement bodies on participants in public procurement; the X Business & Legal Energy Forum (2025, Yurydychna Praktyka), where KAIZEN acted as strategic partner; the Kyiv International Economic Forum (KIEF 2025); the VIII International Criminal Law Forum (2026); and the XIV International Judicial and Legal Forum (2026).

Practice Areas

• Criminal law and procedure, including crimes against the foundations of national security and collaboration-related exposure
• White-collar crime and business protection
• Military law: mobilisation and military registration, reservation of employees, critical-enterprise status, protection of servicemen and members of their families
• Administrative law and procedure, disputes with state authorities
• Credit and banking disputes
• Litigation

Education

National University “Odesa Law Academy”, Faculty of International Law — Bachelor of Laws with honours (2011–2015); Master of Laws with honours (2015–2017).

Since 2023 — postgraduate (PhD) student at Odesa State University of Internal Affairs.

Clients

Ihor Andrieiev and the KAIZEN team advise Ukrainian mid-market companies and their owners in logistics and transport, construction, wholesale and retail trade, food production and IT, as well as private clients, servicemen and members of their families. Corporate clients include LLC “EVOLUTION SOLUTIONS”, LLC “A-TEK TRANS”, LLC “BK KONTAKT”, LLC “FSR Logistics Ukraine”, LLC “STOLYTSIA GROUP”, LLC “MONOLIT BUDSERVIS”, LLC “AROMA GROUP”, LLC “AVTO TRADER”, LLC “HANSA-FLEX”, LLC “Trade and Production Company AMBAR”, LLC “Operating Company EUROSERVICE”, LLC “ES STORE”, LLC “GUNIA PROJECT”, LLC “IT LAND” and NGO “Information and Analytical Centre MTPL”. In 2025 the firm also delivered corporate training for the in-house legal team of Kernel.

Professional Achievements

Individual recognition

• In 2026 recognised as a leader of practice in the fields of military law and criminal law and procedure.
• Named among the leaders of the “Client’s Choice. TOP-100 Lawyers of Ukraine 2025” ranking of Yurydychna Gazeta.

Recognition of the firm under his management

• In the “50 Leading Law Firms of Ukraine 2025” research by Yurydychna Praktyka Publishing, KAIZEN was included in the Bronze League for its high professional standard.
• In the “50 Leading Law Firms of Ukraine 2026” research, KAIZEN entered the TOP-50 itself.
• KAIZEN was recognised among the leaders of practice in the fields of criminal law and procedure and military law.
• KAIZEN received the “Brand Breakthrough” award (PLS TOP TEAM) in 2025.
• Within three years of its establishment the firm grew into a practice with two offices and 12 professionals, with military law becoming its largest practice by workload. In 2026 the firm plans to open a land law and real estate practice.

Public Activity

• As chairman of UNBA NextGen, works on programmes for young attorneys: professional development and mentoring, regional events, and bringing law students into the profession, in particular through the all-Ukrainian student competition “A New Ukraine through the Eyes of Young Lawyers” and the annual recognition of young lawyers of the year.
• Takes part in the humanitarian projects of NGO “Information and Analytical Centre MTPL” as a pro bono legal adviser.
• Provides financial support to servicemen and to military units.
• Initiated a public petition seeking the removal of discrimination in payments to the families of fallen defenders of Ukraine (2025).
• In 2025 the firm provided 1,000 pro bono hours, principally advising internally displaced persons affected by the armed aggression. During the first months of the “Advocate+” project, more than 50 free consultations were provided to servicemen of the 79th Brigade and members of their families.

Notable practitioner in

• Criminal Law (including White-Collar Crime, Anticorruption, War and Military Crimes)
• Military Law and Defense Industry
• Litigation: Domestic and Cross-Border

Contact: tegami.kaizen@gmail.com · +380 99 400 38 38 · www.kaizen.ua