MacSema is an engineering company that offers custom design and development services, specializing in software, mechanical, electronic, and communications engineering. They work on all phases of the development process, from definitions to production, and can manage entire projects or collaborate with project managers. Their services include hardware design, development, and prototyping, as well as software solutions for business, embedded systems, and various programming languages. MacSema integrates their engineering services to provide turnkey solutions, saving clients time and costs associated with multiple vendors.