The phrase "one's engineering background" refers to an individual's education, training and experience in the field of engineering. It encompasses all aspects of their academic qualifications, professional skills and knowledge gained through practical work experience that they have acquired over time. This includes degrees obtained from a university or college, internships undertaken during studies, technical expertise developed while working on projects, as well as any additional certification in specific engineering disciplines such as civil, mechanical, electrical, chemical etc. Essentially, one's engineering background is the sum total of all that they have learned and achieved through their formal education and professional practice in the field of engineering.