* Data Collection Challenges: Tracking post-graduation employment for all graduates from every university worldwide is incredibly difficult. Universities may collect their own data, but methodologies vary, making direct comparisons unreliable.
* Definition of "Engineering Job": What constitutes an "engineering job" is subjective. Does it include internships? Does it matter if the job is directly related to the student's specific degree? Different surveys use different criteria.
* Fluctuations: Employment rates vary year to year due to economic conditions and industry trends. A university ranking highly one year might not the next.
Instead of a single "highest" university, you'll find rankings from various organizations (like US News & World Report, QS World University Rankings, Times Higher Education) that assess engineering programs based on factors *including* graduate employment rates. However, these rankings use different weighting systems and data sources, leading to differing results.
To find potentially strong candidates, you'd need to research the specific engineering disciplines you're interested in and look at the individual university's career services reports and placement data for those programs. MIT, Stanford, Caltech, and other top-tier institutions often have very strong placement rates, but even within those institutions, success varies by department.