These texts might be useful for you when writing proposals.
Ann, Lee, et al. “Research Proposal: The Association Between Serum Vitamin D Levels and Childhood Obesity.” Centers for Disease Control and Prevention, CDC, 1 May 2020, http://www.cdc.gov/rdc/data/b3/SampleProposal.pdf.
Johnson-Sheehan, Richard. Writing Proposals. Pearson, 2007.
Pinkert, Laurie A. “Writing Reports, Proposals, and Technical Documents.” Purdue Online Writing Lab, Purdue University, https://owl.purdue.edu/owl/subject_specific_writing/professional_technical_writing/technical_reports_and_report_abstracts/reports_proposals_and_technical_papers.html.
RaiseMe. “Technical Writers: Salary, Career Path, Job Outlook, Education, and More.” Raise.me, https://www.raise.me/careers/media-and-communication/technical-writers.
Skopinski, T. H., and Katherine G. Johnson. “Determination of Azimuth Angle at Burnout for Placing a Satellite Over a Selected Earth Position.” NTRS—NASA Technical Reports Server, NASA, 1 Sept. 1960, http://ntrs.nasa.gov/citations/19980227091.