Dynamic Template based on Current Page?

I'm managing a grouping of pages in one Collection called "Customer". This allows me to create a groups of pages for different customer types; universities, corporates etc.

We are using different templates to output the right content. What I'm seeking to do is apply a different template based on the current URL. I'm almost there; I'm just wondering how to correctly inject the template variable into the Collection function based on the fields it is fetching.

I did try repeating the Collection function code after the IF statements to output the correct template. The template does get rendered but places it above the the header and footer.

What is the correct way to output the template in the right place?

Collection Function placed after IF Statement

  $post = perch_collection('Customer', [
    'template'      => 'customer/'.$template,
  ]);

Full Code

 # get the collection
  $post = perch_collection('Customer', [
    'filter'        => 'slug',
    'match'         => 'eq',
    'value'         => perch_get('s'),
    'template'      => 'customer/'.$template,
    'skip-template' => 'true',
    'return-html'   => 'true',
  ]);

  # set up the variables
  $title       = $post['0']['title'];
  $slug        = $post['0']['slug'];
  $description = $post['0']['desc'];
  $keywords    = $post['0']['keywords'];
  $noindex     = $post['0']['noindex'];
  $nofollow    = $post['0']['nofollow'];
  $nosnippet   = $post['0']['nosnippet'];

  # set up the sub page variables
  $page_title_01 = $post['0']['page_title_01'];
  $page_title_02 = $post['0']['page_title_02'];

  $page_slug_01 = $post['0']['page_slug_01'];
  $page_slug_02 = $post['0']['page_slug_02'];

  $page_img_01 = $post['0']['page_img_01'];
  $page_img_02 = $post['0']['page_img_02'];

  $page_body_01 = $post['0']['page_body_01'];
  $page_body_02 = $post['0']['page_body_02'];

  # Define the page template, title, active check and social image 
  # using the collection content by checking and matching the current URL
  if ($url == $domain.'/work-with-us/'.$slug.'/'.$page_slug_01) {
    $template = 'page_'.$page_slug_01.'.html';
    $titlePage = $page_title_01;
    $active = $page_slug_01;
    $socialImage = $page_img_01;
  } elseif ($url == $domain.'/work-with-us/'.$slug.'/'.$page_slug_02) {
    $template = 'page_'.$page_slug_02.'.html';
    $titlePage = $page_title_02;
    $active = $page_slug_02;
    $socialImage = $page_img_02;
  }


  PerchSystem::set_var('active', $active);


  # use the variables in the array value
  perch_page_attributes_extend(array(
      'description'    => $description,
      'keywords'       => $keywords,
      'noindex'        => $noindex,
      'nofollow'       => $nofollow,
      'nosnippet'      => $nosnippet,
      'og_description' => $description,
      'og_title'       => $title.' - '.$titlePage,
      'og_type'        => 'website',
      'og_image'       => $socialImage,
      'sharing_image'  => $socialImage,
  ));

  PerchSystem::set_var('active', $active);


  # use the variables in the array value
  perch_page_attributes_extend(array(
      'description'    => $description,
      'keywords'       => $keywords,
      'noindex'        => $noindex,
      'nofollow'       => $nofollow,
      'nosnippet'      => $nosnippet,
      'og_description' => $description,
      'og_title'       => $title.' - '.$titlePage,
      'og_type'        => 'website',
      'og_image'       => $socialImage,
      'sharing_image'  => $socialImage,
  ));


    # Include the header. You can find this in tempates/layouts/global
    perch_layout('global/header', [
      'title' => $title.' - '.$titlePage,
      'body-class' => 'overview-page',
    ]);

    # display the page content
    echo $post['html'];

    # Include the footer. You can find this in tempates/layouts/global
    perch_layout('global/footer');