The Doctoral Thesis consists of an introduction; 4 chapters; conclusions and recommendations; 58 figures; 48 tables; 7 appendices; the total number of pages is 201. The Bibliography contains 207 titles. The aim of research is to develop knowledge management tools that assess the degree of alumni engagement and strengthen alumni long-term cooperation with the Higher Education and Research Institutions. Author describes alumni relations concept, history and contemporary issues. The research is continued with customer concept analysis, paying particular attention to non-profit sector. Latest research and practice of alumni segmentation is reviewed in greater detail. Further chapters cover literature review and latest research of knowledge management and it’s metrics. Particular attention is paid to knowledge management in universities and to customer knowledge management. Author decsribes empirical research of alumni relations in Baltics and application of above mentioned theories and conclusions in development of alumni Triple Helix segmentation, alumni knowledge management model, metrics, metrics methodology and approbation of these. All developments were approbated in Riga Technical University.