J Mark Birenbaum is a professional in their field. Colleagues describe them as "I was Mark's manager at Informiam that Rob referred to in his recommendation. I fully concur with Rob's high regard for Mark, and would recommend Mark to any organization seeking superior technical development skills. At the time of my departure from Informiam, Mark was growing into the team lead role to which I had promoted him. I hope he has further developed that aspect of his career while maintaining his technical currency. I wish him all the best." and "Mark is a great technical lead and developer. His attention to detail makes him a great asset. Moreso, his dedication and commitment to the final product allows him to stand out among fellow developers, as a leader. Mark genuinely cares about his work and works to ensure that it is executed correctly and completely."