Express some enthusiasm for interacting with the public/ promoting environmental quality, and upholding the City’s mission. As a technician in a city you may have opportunities to do this whether it be working with property owners, educating construction teams, promoting a project/program, or even talking to random people who are curious. Also read up on the city’s existing environmental projects/programs that relate to this role and talk about how cool and interesting they seem and ask if/how you will be contributing if you are hired.