Human Resource Management exists in a company or organization because of employees or people who work together to achieve the company's vision. Human Resource Management can help to see the performance of employees and all their achievements in the company. A group of people in a company or organization is called a team. Start-ups are new startup companies that are still leading to product development and market research. A startup team refers to a group of people with a specific idea that leads to executing a business. So, usually, a team that aims to build a start-up starts execution with limited human resources. The existence of these limitations requires the team at the start-up to analyze the part of the work that needs to be filled with people who are suitable for their positions. So it is essential to do a job analysis and job description for each role or position. Roles at work can be carried out with the competencies possessed by team members; for that reason, it is important to be aware of one's abilities and the work interests they have. Furthermore, a person's personality shows how a person's work style or decisions on every problem. Myers and Briggs's theory divides personality types into 16 out of four large-scale psychologist types: extrovert/introvert, observant/intuitive, feeling/thinking, assessing/looking for prospects. So, Human Resource Management has become necessary for all categories of companies, newly established and successful ones, to control and improve their employees to make a better company. RonaRias is a start-up company engaged in the beauty industry that provides make-up and model services for weddings, engagements, and product photos. Established in January 2021, but the development of income is continually declining. It is necessary to identify the problem, find the cause to be resolved and become a business that continues to show growth. The problem is that there are limited abilities and positions that people in their respective fields do not fill. Therefore, the researcher decided to analyze the abilities that the team members were aware of and conduct an assessment of their personality types. The RonaRias team's personality type assessment was carried out by filling out the online NERIS Type Explorer® Scale. Knowing the team personality type from RonaRias helps researchers understand the background of team members' work styles and why they have these competencies. As is the case for marketing, his intuitive nature encourages him to continue to think creatively because he is an INFP-T. This research was conducted with a qualitative approach. Conduct semi-structural interview sessions and focus group discussions with variable indicators related to job interest, business building, and job loyalty. The data obtained from the interviews and focus group discussions was processed using open coding to determine the negative and positive tendencies of the respondents' answers. After the analysis, the researcher saw that the competence of the respondents and their work styles were related to the type of personality they had. So, as a start-up founder, it is vital to know each other's personalities to allocate work according to their interests and take care of each other according to their respective personalities. The researcher also recommends that start-up founders pay attention to aspects of human resource management because employees are essential to achieving company goals. So it needs to be done by people who are following their fields.