Employee List

<ul class="employees__list">
              <?php $counter = 1; ?>
              <?php while(have_rows('employee')): the_row(); ?>
                <li class="employees__list__employee<?php if($counter % 2 ==0){ echo ' even'; }?>">
                  <?php $image = wp_get_attachment_image_src(get_sub_field('image'), 'bio-pic'); ?>
                  <div class="employees__list__employee--image">
                    <?php if($image): ?>
                      <img src="<?php echo $image[0]; ?>" alt="" class="img-responsive">
                    <?php else: ?>
                      <img src="http://via.placeholder.com/600x600" alt="" class="img-responsive">
                    <?php endif; ?>
                  </div>

                  <div class="employees__list__employee__content">
                    <div class="employees__list__employee__content--wrap">
                      <h4 class="employees__list__employee__content--name"><?php echo get_sub_field('name'); ?></h4>
                      <h5 class="employees__list__employee__content--title"><?php echo get_sub_field('title'); ?></h5>
                      <p class="employees__list__employee__content--quote"><?php echo get_sub_field('quote', false); ?></p>
                    </div>
                  </div>
                </li>
              <?php $counter++; endwhile; ?>
            </ul>

This resolves the problem:

            <li class="employees__list__employee<?php echo ' ' . $class; ?>">
              <?php $image = wp_get_attachment_image_src(get_sub_field('image'), 'bio-pic'); ?>
              <div class="employees__list__employee--image">
                <?php if($image): ?>
                  <img src="<?php echo $image[0]; ?>" alt="" class="img-responsive">
                <?php else: ?>
                  <img src="http://via.placeholder.com/600x600" alt="" class="img-responsive">
                <?php endif; ?>
              </div>

              <div class="employees__list__employee__content">
                <div class="employees__list__employee__content--wrap">
                  <h4 class="employees__list__employee__content--name"><?php echo get_sub_field('name'); ?></h4>
                  <h5 class="employees__list__employee__content--title"><?php echo get_sub_field('title'); ?></h5>
                  <p class="employees__list__employee__content--quote"><?php echo get_sub_field('quote', false); ?></p>
                </div>
              </div>
            </li>
          <?php $counter++; endwhile; ?>
        </ul>