Dr. Aluoch has served as Director, Communicable Diseases, Ministry of Health in Kenya; National Tuberculosis Programme Manager; Director, Tuberculosis and Respiratory Disease Research Centre, Kenya Medical Research Institute (KEMRI); Honorary Lecturer, Department of Medicine, University of Nairobi; Consultant Chest physician, Kenyatta National Hospital (KNH); Head Infectious Diseases Hospital; Director of Training, Clinical Officers Tuberculosis and Leprosy, Medical Training Centre (MTC). He has had several consultancies with the World Health Organization (WHO) and served as Chairman of several Parastatal Boards in Kenya.

He is a Past Chairman, Kenya Medical Association (KMA); Founder Chairman, Kenya Association of Physicians (KAP); Patron, Kenya Association for the Prevention of Tuberculosis and Lung Diseases (KAPTLD); Past Chairman, International Union against Tuberculosis (IUAT); Past Vice President, Commonwealth Medical Associations; Current President, Pan African Thoracic Society (PATS) and Chairman, HIV Clinicians Society of Kenya. He also oversees the Representative/Adviser (EA) Royal College of Physicians of Edinburgh.