This study is about Business Process Reengineering and Organizational Performance of Third PartyrnLogistics Service Providers in Ethiopia a case study of Comet transport. The research aimed to identifyrnthe impact of implementing BPR on the efficiency and effectiveness of 3PLS providers to be assessed byrnevaluating presence of significant increase on firm level performance. As BPR promises to bring aboutrndramatic changes in firm performance outcomes, specific operational and financial performancernindicators were selected for evaluation. As the study was a case study, Comet Transport Share Companyrnwas selected as a study unit and 12 years of performance data was compiled along with other pertinentrninformation gathered through interview. Besides, BPR implementation report and other relevantrndocuments were analyzed. Extensive literature survey was undertaken to underpin relevant performancernindicators appropriate and fit to evaluate the performances of third party logistics service providers. Thernperformance data compiled for the study was analyzed by SPSS statistical package and student t testrncomparisons was made pre and post BPR performance indexes. On the bases of performance data inrnbetween (2002 and 2014) E.C. Key operational and financial performance measure indexes namelyrnAverage truck turnaround time, Average Tariff per ton per km, Load factor, Labor productivity, Returnrnon assets, profitability ratio ,cost to revenue ratio, Km travelled per year, freight ton per km, number ofrntrucks available for operation throughout the year, truck down time throughout the year, Actual capacityrnutilization and other drive indexes ; Comet has exhibited significant improvement both on operationalrnefficiencies and effectiveness as asserted by increase financial index. With 95% certainty, the studyrnasserted the dramatic increase in all mean performances especially in revenue, profitability, reduction inrncost to revenue ratio, truck availability, tone KM coverage, tonnage lifting , load factor and otherrnindexes utilized to measure performances. Poor performance was observed with regard to reducing truckrndown time, and employee turnover indicating area of improvement works to be further investigated by thernmanagement of Comet.Based on strong findings of the study, the researcher concludes positive outcomernof implementing BPR to have resulted enhanced performance increasing operational and financialrnefficiency and effectiveness and advices other companies to follow suits to reap of gains achieved byrnComet Transport Company.rnKey words: BPR,Revenue,profitability ratio,Km travelled per year, load factor, freight ton perrnkm, number of trucks available for operation throughout the year, truck down time, actualrncapacity utilization.