Chimau is an Advocate of the High Court of Kenya with over 15 years of experience in law practice in Kenya and regionally and holds LLB (Makerere Univesity), Post Graduate Dip. in Law (KSL), SMC (KSG) and SLDP (KSG). She currently pursuing a Masters degree in Justice Peace and Cohesion (MJPC) at Catholic University of Eastern Africa. She has undertaken specialized public assignments in the areas of legal compliance audits in several State Corporations, currently serve in the Kenya Institute of Supply Management Disciplinary Committee as a representative of the Hon. Attorney-General.

She is currently a Deputy Chief State Counsel serving as the Head of the Regional Office of the Attorney General & Department of Justice (OAG&DOJ) in Kajiado County. She represents the Hon. Attorney General in civil cases against the government, served as alternate member where she represented the Hon. Attorney General to spearhead reforms in the review of bond and bail policies. She has also served as a member of the Pupillage Committee under the OAG&DOJ charged with the responsibility of interviewer and supervisor.