Pedram

$(".tabs > .team-member-name").each(function() {
  $(this).prependTo($(this).siblings(".team-member-description"));
});

.team-member-description {
  border: 1px solid red;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="tabs">
  <div class="team-member-name">Mirko</div>
  <div class="team-member-description">
    <p>Text</p>
  </div>
</div>
<div class="tabs">
  <div class="team-member-name">Marko</div>
  <div class="team-member-description">
    <p>Text</p>
  </div>
</div>