Mandy grew up alongside a sister – both of them were adopted by Sig when he married their mother June. The sisters have a half-sibling, from an earlier marriage of their father. With their father’s passion for fishing, both of them learned skills such as tendering at a young age. Unlike her sister, Mandy wanted to follow in her father’s footsteps and after completing a degree in college, she enrolled at a Maritime Academy.
She wanted to prove that she was skilled and knowledgeable so that the other crew members would acknowledge her.
Before completing her education, she had served as a deckhand with her father, and been featured sporadically on “Deadliest Catch” since her childhood. She then became a full-time member of her father’s crew, and has been a consistent presence on television since. There was even one occasion where she took the captain job from her father who was suffering from a few health issues.