Undergraduate engineering students are commonly introduced to design in their first year and tackle a more authentic design challenge during senior year, with intervening courses focused on technical problem solving. Along this trajectory, students should acquire skills related to the development of engineering requirements, which are important to the technical framing of design problems. Through the lens of framing agency, this mixed-methods study explores first-year and senior students' knowledge of engineering requirements as they engaged problems within their respective courses. Findings suggest that learning about requirements as a framing mechanism was not well-supported across the curriculum. Implications include a need to engage students in requirements development during the middle years and improve support for iterative framing and solving activities.