Subcategory Blog view

[williama]

Hi guys, I hope someone might be able to help with this.

I would like to display the category blog view via subcategories, so one subcategory title, then articles displaying thumbnails (clickable and linkable to the actual article). Then another subcategory title, and then its articles. For example.

SHORT FILMS
Rows and columns of articles within this subcategory.

CLIENT WORK
Rows and columns of articles within this subcategory.

This is my page as it stands. You can see the posters for short films, along with the thumbnails for client work which are in a different size and shape. I would like to separate these by their subcategories, but keep them on the same page, under each of their subcategory headings.
https://www.williamallum.com/index.php/portfolio

Is there a way to do this with the category blog view, it doesn't seem to allow it, instead it puts the subcategory titles at the bottom of the page for some reason. Thank you.