I was successful in placing a rule on a field to do this via JavaScript. If you place this rule on the field, anytime it changes it will update to the correct Title Case format.
//get value of field
var field = $form.getValue(ruleFieldInfo.XPath);
//transform field
var transformField = field.toLowerCase().replace(/\b\w/g, c => c.toUpperCase());
$form.setValue(ruleFieldInfo.XPath, transformField);
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Jamie Eberhart
DS Technology Hub LLC
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