At AmSty, we believe great leadership is about demonstrating excellence, guiding and empowering others, and instilling a vision for a more sustainable future. That's why we're proud to announce that Christina Guice, Joliet plant manager, and Diana Rodriguez, Polystyrene Sales Director for Latin America, have been named 2025 Women Breaking the Mold award winners by Plastics News.

This prestigious recognition celebrates women who are making a lasting impact in the plastics industry, and Christina and Diana embody that spirit every day in two different, but impactful, ways.

Christina Guice: Leading with Purpose at the Joliet Plant

As plant manager at AmSty's Joliet facility, Christina leads a complex operation that produces high-impact polystyrene – a material found in refrigerator linings, party cups and food and medical packaging. With 32 employees and one contractor under her leadership, Christina oversees every aspect of the plant's daily functions, including operations, EH&S, mechanical integrity, quality, cost control and customer service.

Christina's approach is hands-on. She's not just managing operations – she's setting a tone for open communication, teamwork and outstanding work.

"I make it my business to know everything that's going on," she said. "And I make an effort to talk to every person, every day."

Christina is also proud of helping to break the long-held mold that women, especially minority women, don't lead in manufacturing.

"There are so many women in engineering, but so few go into manufacturing. I want to help change that," she said.

AmSty President and CEO Dr. Randy Pogue, who nominated Christina, admires her energy, discipline and integrity.

"She has successfully weathered major operational challenges while upholding the highest standards in safety, performance and team morale," he said. "She's also a passionate advocate for sustainability, especially when it comes to circular recycling of polystyrene. Christina is a leader to watch and a role model for the next generation."

Read Christina's full Women Breaking the Mold profile from Plastics News here.

Diana Rodriguez: Four Decades of Leadership, Insight and Impact

Diana's career is a testament to what's possible with passion, perseverance and purpose. With more than 40 years of experience in the plastics and petrochemical industries, she's built a remarkable career grounded in deep industry knowledge and a people-first approach to leadership.

As polystyrene sales director for Latin America, Diana oversees AmSty's commercial operations across the region – building strong relationships, supporting her teams and helping the business grow.

Throughout her career, she has led by example. Whether managing complex regional markets or supporting the next generation of professionals, she's known for her steady presence and intentional mentorship.

"Supporting someone's growth, professionally and personally, is one of the most meaningful parts of leadership," she said. "Helping people see their own potential and reach for it is rewarding."

Diana has helped team members find their path, watched them rise to senior leadership roles and remained a trusted mentor throughout their careers. This people-first mindset is evident in everything she does.

And while many of her peers have begun to retire, Diana continues to lead with the same energy and curiosity that's driven her for decades.

"I've loved every assignment I've had," she said. "That's made it easy to enjoy the work – and life – along the way."

Pogue, who also nominated Diana, calls her "a trailblazer in every sense of the word."

"She brings unmatched business insight and deep human connection to everything she does," he said. "Her influence on our industry, and on the people in it, is lasting and profound."

Read Diana's full Women Breaking the Mold profile from Plastics News here.