Marlena Grzaslewicz is an accomplished supervising sound editor and dialogue editor and collaborator with Ira. She is known for her work on acclaimed documentary films such as historical series The War, Baseball, and Jackie Robinson, helping shape the emotional and narrative impact of archival footage and interviews through precise dialogue editing and sound design. Her work is distinguished by its clarity and sensitivity, bringing history to life through sound and making her an integral part of the storytelling process on some of the most respected documentary projects of the past decades.