She holds a Bachelor of Business Administration from the College of Business Education (CBE), Dar es Salaam.

Annestacey has worked for different clients and different assignments including but not limited to payroll management services, corporate income tax compliance services, withholding tax computations, monthly VAT compliance services, processing tax payments on behalf of client, tax health-checks, etc.

Some of the companies that Annestacey has provided services to include Krones Aktiengesellschaft, Polytra Tanzania Limited, Guardian Glass Holding S.P.C, Steinecker GMBH, OG Enterprises Ltd, Polytra East Africa Ltd etc.