This study evaluates the impact of the professional career construction model (CCP) on the professional practice of counselors and the social sustainability actions put into play in their professional performance. A mixed methodology featuring a predominantly qualitative approach is used to examine the employment situation and professional development of this group. Forty-eight socio-labor counselors from the autonomous community of Andalusia (Spain) participated in the self-application of the CCP model. Subsequently, a questionnaire was administered via a discussion group. The data analysis combines descriptive and qualitative procedures with the support of computer software. Strengths, weaknesses, opportunities, and threats (SWOT) analysis and triangulation techniques are used as methodological integration strategies. The resulting data are discussed, later presenting a series of limitations and prospective of the study. Relevant conclusions are provided about the impact of the CCP model on the professional careers of counselors based on their satisfaction with the self-application of the model, their career progression and employment status, and their self-perceptions of the social impact of their counseling careers. These conclusions highlight the implications of the study regarding promoting the sustainable careers of socio-labor counselors, enhancing their initial and continuous training, and facilitating their occupational actions in a complex and constantly changing society.