Most engineering jobs do not require the use of calculus on a day to day basis. A typical BS/MS engineer will utilize computer codes that have all of the advanced math embedded in the code. The engineer simply inputs dimensions/parameters and the code does all/most of the heavy lifting. A good engineer will check (or spot check) the outputs from these codes though. There may be times when you need to fix/update a piece of code or create something new and have to use some advanced math, but this is usually not a frequent scenario. Typically, algebra is used extensively, and sometimes the algebra can get fairly complex. Most of the formulas are the closed-form type (i.e. plug-n-chug).
Generally speaking Electrical Engineers and research MS/PhD engineers use more advanced math on a daily basis. If calculus and diffeq are not your forte, you may want to avoid becoming a EE and/or researcher. If algebra is not your forte, you may want to look into a different profession altogether.