\documentclass[aspectratio=169]{beamer}

\usepackage{microtype}
\usepackage{tikz}

\definecolor{bngreen}{HTML}{3c8e64}
%\setbeamercolor*{structure}{bg=white,fg=bngreen}
\usecolortheme[named=bngreen]{structure}
\setbeamertemplate{navigation symbols}{}
\setbeamertemplate{headline}{\hfill\includegraphics[width=.7cm]{logo-running}\hspace{0.1cm}\vspace{-.7cm}}

\author{Justin Bed\H{o}\\WEHI}
\title{\includegraphics[width=.7\linewidth]{logo}\\functional, reproducible bioinformatics workflows}
\date{November 10, 2020}

\begin{document}

{
  \setbeamertemplate{headline}{}
  \begin{frame}
    \maketitle
  \end{frame}
}

\begin{frame}
  \begin{center}
    \begin{tikzpicture}[->,>=stealth,shorten >=1pt,auto,node distance=1.5cm,thick]
    \node (a) {align};
    \node (s) [below of=a] {sort};
    \node (c) [below of=s] {variant calling};

    \path (a) edge node {} (s);
   \end{tikzpicture}
  \end{center}
\end{frame}

\end{document}