Engaging with the world of mixed martial arts (MMA) is an exhilarating journey. As one delves into this multifaceted discipline, the importance of expert guidance cannot be overstated. Therefore, securing the services of a professional MMA instructor becomes a crucial task. To navigate this endeavor, one must be guided by certain principles and considerations.

Before we proceed, it is imperative to grasp the concept of an MMA instructor. An MMA instructor is a professional trainer who boasts the requisite knowledge and expertise to teach various forms of martial arts amalgamated into a coherent, effective fighting style. The instructors are usually veterans with years of experience in different martial arts, having honed their skills through rigorous practice and real-world combat scenarios.

The first step in hiring a professional MMA instructor should focus on mapping out your specific objectives and requirements. Are you aiming for professional MMA fighting, or is your focus directed towards self-defense or maintaining physical fitness? Answers to these questions help delineate your ultimate goal, thereby guiding you to the right instructor.

To illustrate this further, let's borrow the concept of utility from Economics. In this context, utility can be understood as the satisfaction derived from the services of an MMA instructor. The utility maximization principle posits that consumers (students in this case) will choose a product or service (the MMA instructor) that maximizes their total utility. Therefore, honing in on your objectives aids in maximizing this utility.

Next, scrutinize the instructor’s qualifications. A professional MMA instructor should have verifiable credentials from recognized institutions. This is a demonstration of their commitment to the discipline and an assurance of their competence. A comparison can be drawn here to the legal profession, where lawyers are mandated to pass the bar exam to practice law. Similarly, reputable MMA institutions have rigorous certification programs to ensure the highest standards of training.

Thirdly, consider the instructor’s experience. In MMA, this extends beyond mere knowledge of techniques to practical application. An analogy can be drawn to the field of Medicine where the practice of residency is followed. Much like medical doctors, an MMA instructor's experience contributes to their understanding of the discipline, their ability to make quick decisions, and their capacity to teach effectively.

Experience here should also encompass their track record in teaching. An instructor might have a sterling record as a fighter but lack the requisite skills to impart that knowledge effectively. Therefore, it is vital to ensure your prospective MMA instructor possesses both fighting and teaching experience.

Finally, do not neglect the financial aspect of your engagement. Costs of hiring should align with market rates and be justifiable by the instructor's expertise, experience, and the quality of service they provide. The law of demand and supply, a fundamental principle in Economics, comes into play here. It posits that the price of a good or service (in this case, the instructor's fees) depends on its demand and supply in the market. Thus, understanding this principle could guide you in selecting an instructor who offers the best value for your investment.

In conclusion, the task of hiring a professional MMA instructor is an intricate process, one that requires careful consideration and informed decision-making. It is an exploration of personal goals, professional credentials, experience, and economic factors. By adhering to these principles, you can ensure that your MMA journey is guided by a competent and professional hand. The reward is a journey of growth, not just in the discipline of MMA, but in self-discipline, resilience, and a deeper understanding of one's capabilities.