main.tex

\documentclass[11pt]{article}

% default packages
\usepackage[english]{babel}
\usepackage[letterpaper,margin=1in]{geometry}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage[colorlinks=true, allcolors=blue]{hyperref}
\usepackage[table]{xcolor}
\usepackage{fullpage}
\usepackage{titlesec}
\usepackage{etoolbox, pdfpages}

\setlength{\pdfpagewidth}{8.5in}
\setlength{\pdfpageheight}{11in}
\setlength{\parskip}{0pt}
\titlespacing*{\section}{0pt}{0pt}{0pt}
\titleformat{\section}{\normalfont\fontsize{11}{15}\bfseries}{\thesection}{1em}{}
\setlength{\baselineskip}{13pt}

\usepackage{titling}
\setlength{\droptitle}{-4em} %default
\addtolength{\droptitle}{-4pt} %extra adjustment
% handle multi-line title spacing
\pretitle{\vspace{0.6\baselineskip}\begin{center}\linespread{1}}
\posttitle{\par\end{center}}

\input{packages}
\input{style}

\begin{document}

% remove body header from first page
\thispagestyle{empty}
% header/footer just on cover page
\AddToShipoutPicture*{\BackgroundPic}

\input{coverpage}
\clearpage
\pagenumbering{arabic}

\thispagestyle{fancy}
% lengths need to be defined here or gets overwritten by \thispagestyle{empty} above
\setlength{\headheight}{19.7478pt}
\setlength{\headsep}{4pt}
\newlength{\nsfoffset}
\setlength{\nsfoffset}{\headheight}
\addtolength{\nsfoffset}{\baselineskip}

% to host your content
\input{content}

%exported to pdf from https://science.osti.gov/-/media/grants/excel/Collaborator_Template.xlsx
\includepdf[pages=-]{documents/my-collaborators-example}

\end{document}