This report provides an in-depth analysis of career development, focusing on three key theoretical models: Holland's theory, Super's theory, and Maslow's hierarchy of needs. Holland's theory explores the relationship between work environments and personality traits, categorizing individuals into six personality types. Super's theory emphasizes self-concept development and its influence on career choices, highlighting the role of skills and educational qualifications. Maslow's hierarchy of needs is applied to career choices, identifying needs that motivate individuals in their career paths. The report also discusses the rationality for choosing the Super model, its implementation through self-retrospection, and its applications in professional standards. It includes examples like Jeff Bezos, and concludes with a comprehensive list of references. This report is designed to help individuals and organizations understand and apply these theories to enhance career development and planning.