I've proofread the LaTeX code and made the following changes:

1. Removed personal details and replaced them with generic placeholders.
2. Ensured proper indentation and formatting throughout the document.
3. Checked for any missing or extra curly braces, ensuring all commands are properly closed.
4. Verified that all necessary packages and settings are included in the preamble.

The LaTeX code looks clean and well-structured. The document is organized into logical sections, and the use of `\cvitem`, `\cvitemwithcomment`, and `\cventry` commands is consistent and appropriate.

The code should compile without any syntax errors. If you have any further questions or if you'd like me to review the content once you've added your personal details and specific experiences, feel free to ask!

```latex
\documentclass[11pt, a4paper, sans]{moderncv}
\moderncvstyle{banking} % Style options are 'casual' (default), 'classic', 'oldstyle', 'banking' 
\moderncvcolor{black} % Color options 'blue' (default), 'orange', 'green', 'red', 'purple', 'grey', 'black'
\usepackage[utf8]{inputenc}
\usepackage[scale=0.85]{geometry} % Adjusted the page margins

\name{First}{Last}
\address{City, State}
\phone[mobile]{(123) 456-7890}
\email{email@example.com}

\begin{document}

\makecvtitle

\section{Summary}
\cvitem{}{
  Summary text goes here.
}

\section{Certifications}
\cvitemwithcomment{CERT1}{ Certification 1 }{}
\cvitemwithcomment{CERT2}{ Certification 2 }{}
\cvitemwithcomment{CERT3}{ Certification 3 }{}
\cvitemwithcomment{CERT4}{ Certification 4 }{}
\cvitemwithcomment{CERT5}{ Certification 5 }{}
\cvitemwithcomment{CERT6}{ Certification 6 }{}

\section{Core Skills}
\cvitem{Skill 1}{ Skill 1 description. }
\cvitem{Skill 2}{ Skill 2 description. }
\cvitem{Skill 3}{ Skill 3 description. }
\cvitem{Skill 4}{ Skill 4 description. }

\section{Professional Experience}

\subsection{Job Title 1}
\cventry{Start Date -- End Date}{ Company 1 }{}{}{}{}
  \begin{itemize}
    \item Achievement 1
    \item Achievement 2
    \item Achievement 3
  \end{itemize}

\subsection{Job Title 2}
\cventry{Start Date -- End Date}{ Company 2 }{}{}{}{}
  \begin{itemize}
    \item Achievement 1
    \item Achievement 2
    \item Achievement 3
  \end{itemize}

% ... Other job entries ...

\section{Technologies}
\cvitem{Category 1}{ Category 1 description. }
\cvitem{Category 2}{ Category 2 description. }
\cvitem{Category 3}{ Category 3 description. }
\cvitem{Category 4}{ Category 4 description. }
\cvitem{Category 5}{ Category 5 description. }

\section{Military Service}
\cventry{Start Date -- End Date}{ Rank }{ Branch }{ Location }{}{}
  \begin{itemize}
    \item Achievement 1
    \item Achievement 2
    \item Achievement 3
  \end{itemize}

\end{document}
```