William Ernest

Lead Partner

Mr. William is the founder and Lead Partner at Bill & Williams Advocates. He is a seasoned legal practitioner whose experiences and approach to legal problem solving has been a magnet for the bigger chunk of clients that the firm serves. He is a passionate and consistent legal practitioner for over a decade. His involvement with various national and international transactions has led to his outstanding skills and experience in both consultancy and advisory services as well as mediation, arbitration and litigation for both local and international clients. Apart from being a remarkable litigator in national, regional and continental Courts, he is also resourceful in the areas of Corporate Governance, Organisational Policy Formulation, Intellectual Property (IP) and Advisory works. He has set a high ethical bar as a leader and legal practitioner.

Aksa Mbwana


She is a Partner and Head of Conveyance and Employment Affairs Department at Bill & Williams Advocates. She is a passionate Conveyancer whose assistance to clients in buying and selling landed properties makes her an icon in this legal sub-sector. She has successfully assisted clients on lease matters, Mortgages, and all types of land dispositions. She is well acquainted with the laws and procedures, applicable taxes and government fees as well as necessary documents for disposition. Our clients have been impressed by Aksa’s services on Employment and labour-related matters especially with her abilities in offering conflict preventive advice.

Peter Mabiki


He is a Partner and Head of Corporate & Advisory Services Department at the firm. He assists clients in incorporation and registration of various legal entities such as companies, non – Governmental Organizations, Churches, and partnerships. Peter’s celebrated efficiency and effectiveness in undertaking clients’ works does not end at the registration stage. He goes further to assist clients in post-compliance matters so that a client’s business takes off without collision with the laws and regulating authorities. He is acquainted with on-the -ground processes required for company formation and related corporate governance and post registration issues.

Vincent Stewart


He is a Partner and Head of Litigation & Alternative Dispute Resolution Department at the firm, having moved through the ranks of the firm from a Trainee, Legal officer, Associate to a Partner. He is an enthusiastic litigator whose quality services to clients and outstanding advocacy abilities have always exceeded clients’ expectation. His tactical but proficiently organized advocacy skills have always bore fruits for our clients whose matters reach the courts of law. Mr. Vicent leads a team of Lawyers that has been seen representing corporations, companies, non-governmental Organisations and individuals in the Tanzania local courts and the East African Court of Justice.

Joseline Deogratias

Legal Officer

Ms. Joseline is a legal Officer at Bill & Williams Advocates. She assists in the Corporate and Advisory Services Department of the firm. Her proven research, drafting and negotiation abilities have been of great help to our clients.

She holds a Bachelor Degree in Law (LLB) from Tumaini University Makumira, Main Campus and a post graduate Diploma of the Law School of Tanzania.

Leah Adam

Legal Officer

She is a Legal Officer assisting in the Conveyance and Labour Affairs Department at Bill & Williams Advocates. Her brilliance in tackling challenging legal issues of our clients has presented her as a n exceptional young legal mind in the firm. Her swiftness in discerning legal problems and providing relevant solutions have always thrilled our clients and members of the law firm. She assists clients in putting down preventive mechanisms and assists them to get out legal challenges where it happens. 

Mary Mkongo

Accounting Officer

Mary is an accounting Officer. She assists the firm in keeping financial records and compliance matters relating to finances and Taxes. She holds a Diploma in Finance and Banking from the Institute of Accountancy Arusha.

Emiliana Petro

Administrative Secretary & Receptionist

Emiliana is an enthusiastic Secretary whose presence at the front office of the firm has always been the source of delight to our clients. She is a holder of Certificate in Secretarial Course stage I and II. Previously, she has worked with ARIT Energy Tanzania and the Evangelical Lutheran Church in Tanzania at the North Central Diocese.  

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