Edit in JSFiddle

$(document).ready(function (){
   var table = $('#example').DataTable({
      'ajax': 'https://gyrocode.github.io/files/jquery-datatables/arrays_id.json',
      'initComplete': function(settings){
         var api = this.api();

         api.cells(
            api.rows(function(idx, data, node){
               return (data[2] === 'Software Engineer') ? true : false;
            }).indexes(),
            0
         ).checkboxes.select();
      },
      'columnDefs': [
         {
            'targets': 0,
            'checkboxes': {
               'selectRow': true
            }
         }
      ],
      'deferRender': true,
      'select': 'multi',
      'order': [[1, 'asc']]
   });
});

<h3><a target="_blank" href="https://www.gyrocode.com/projects/jquery-datatables-checkboxes/">jQuery DataTables Checkboxes:</a> <a target="_blank" href="https://www.gyrocode.com/projects/jquery-datatables-checkboxes/examples/api/select-checkbox/">Select checkboxes on page load</a> <small>(Alternative solution)</small></h3>
    
<table id="example" class="display" cellspacing="0" width="100%">
   <thead>
      <tr>
         <th>Name</th>
         <th>Position</th>
         <th>Office</th>
         <th>Extn</th>
         <th>Start date</th>
         <th>Salary</th>
      </tr>
   </thead>
   <tfoot>
      <tr>
         <th>Name</th>
         <th>Position</th>
         <th>Office</th>
         <th>Age</th>
         <th>Start date</th>
         <th>Salary</th>
      </tr>
   </tfoot>
</table>

<hr><a target="_blank" href="https://www.gyrocode.com/projects/jquery-datatables-checkboxes/examples/api/select-checkbox/">See full article on Gyrocode.com</a>