As of 2021, the UCI Samueli School of Engineering only has PowerPoint templates, I have made an effort to make these as similar as possible.
\documentclass[aspectratio=169, 10pt]{beamer} % widescreen ratio
% \documentclass[10pt]{beamer} % standard ratio
% background should be changed accordingly
\usepackage[english]{babel}
\usepackage[utf8]{inputenc}
\usepackage{helvet} %to use Arial-like font
\mode<presentation>{
\usetheme{default} % or try Darmstadt, Madrid, Warsaw, ...
\usecolortheme{default} % or try albatross, beaver, crane, ...
%\usefonttheme{default} % or try serif, structurebold, ...
\setbeamertemplate{navigation symbols}{}
\setbeamertemplate{caption}[numbered]
}
\setbeamertemplate{background}{
\includegraphics[width=\paperwidth,height=\paperheight]{backgroundwidescreen.pdf}
%\includegraphics[width=\paperwidth,height=\paperheight]{backgroundstandard.pdf}
}
\setbeamertemplate{headline}{ % to leave some space for the UCI headline
\vspace{1.4cm} % change depending on font size
}
\setbeamertemplate{footline}{
\leavevmode%
\hbox{%
\begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
\usebeamerfont{title in head/foot}\insertshortauthor
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
\usebeamerfont{title in head/foot}\insertshortinstitute
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}%
\usebeamerfont{date in head/foot}\insertshortdate{}\hspace*{2em}
\insertframenumber{} / \inserttotalframenumber\hspace*{2ex}
\end{beamercolorbox}}%
\vskip0pt%
}
\makeatother
% For other needed packages
\include{my_preamble}
% For outline every section
\AtBeginSection[]
{
\begin{frame}
\frametitle{Outline}
\tableofcontents[currentsection]
\end{frame}
}
\newcommand{\R}{\mathbb{R}}
\DeclareMathOperator{\Tr}{Tr}
\title[Beamer template]{A \LaTeX~beamer template}
\subtitle{For the UCI Samueli School of Engineering}
\author{Tomàs Ortega}
\institute{UCI Samueli Shcool of Engineering}
%\date{2021}
\begin{document}
\begin{frame}[noframenumbering, plain]
\titlepage
\end{frame}
% Automatically generated outline.
\begin{frame}{Outline}
\tableofcontents
\end{frame}
\section{A first section}
\begin{frame}{Hello world}
Lorem ipsum
\end{frame}
\section{A second section}
\begin{frame}{Bye world}
Lorem ipsum
\end{frame}
\end{document}