Meet the TimberHP Sales Team

Alex Donnelley

Kali Sipes

Kali Sipes is a Sales professional with experience in bridging Architecture, Design, and building materials. As a Business Development Manager for TimberHP , Kali brings her expertise in relationship building, product positioning, and market strategy to the rapidly growing world of sustainable, wood-based insulation solutions.  With a foundation in Architecture, Kali has partnered with leading firms to deliver innovative, high-performance materials that align with both design intent and environmental responsibility.  Known for her entrepreneurial mindset, competitive drive, and collaborative approach, she thrives on creating authentic connections that drive growth.

Outside of work, Kali channels her leadership skills into coaching youth track athletes, emphasizing resilience and confidence.

Ken Kiefer

Paul Brinkman

A native New Englander with 30+ years in the lumber, building materials and insulation industries, Paul has seen all sides of these industries from retail to distribution to manufacturing .

Prior to joining the team at Timber HP, Paul held sales related positions with Cameron Ashley and U.S. Lumber/ Boston Cedar where he excelled at product knowledge and problem solving, and is recognized for consistently delivering an exceptional customer experience.

Outside of work, Paul enjoys time spent with family, traveling, Boston sports and getting outside to play golf and hockey.

Allison Zuchman

Allison is an architecture and green building professional expert at collaborating with project teams to explore healthy, low-carbon, creative building solutions together. Drawing on deep experience with green building certification projects, portfolio-wide client efforts, and education work, she connects the dots helping teams navigate architecture and construction goals in a clear and practical way. In her role as Market Intelligence & Lead Development Manager at TimberHP, Allison focuses on the New England market, supporting sales and technical services team with relationship-driven market insights and early-stage project development. Inspired by leadership in non-toxic, recyclable, bio-based insulation and its role in local economic development in Maine, Allison brings a mission-driven mindset and passion to every partnership and project.

Gabrielle Lundy

Having over a decade of experience in sales and manufacturing in the building materials industry, I’m proud to represent TimberHP as their Strategic Account Manager for New York State. 

In this hybrid role, I work alongside specifiers, builders, contractors, and distributors, providing support and education.  My goal is to support the industry with high performance insulation solutions that are carbon negative and yield an uncompromised user experience. 

I currently sit on the board for the Central New York Lumber Dealers Association, and I am the New York Trustee for NYLE, North American Young Lumberman’s Employees.  

John Rockwell

In the decades since obtaining his architecture degree, John Rockwell has practiced architecture, been on the faculty at Wentworth Institute in Boston, designed his own Pretty Good House, designed over 1,200 heat recovery ventilation systems while with Zehnder America, provided technical support regarding airtightness and moisture management to hundreds of construction professionals while with SIGA, and now is excited to be a brand ambassador for TimberHP, the first and only manufacturer of wood fiber insulation in North America. He has spoken at many conferences, trade shows and hundreds of lunch and learns at architects’ offices and job sites.

Anthony Stidham

Roland Rylander

Roland Rylander is a sales and business development leader with over two decades of experience driving growth in the building enclosure, insulation, and high-performance construction industries. Known for his strategic leadership and technical expertise, he has successfully led regional and national sales initiatives, developed strong distribution and contractor networks, and secured multimillion-dollar project opportunities across commercial and residential markets. His background spans business development, team leadership, market expansion, and advanced building science solutions including continuous insulation, air and water barriers, and energy-efficient building systems. Throughout his career with companies such as Sika and Rmax, Roland has built a reputation for delivering sustained revenue growth, cultivating long-term industry relationships, and helping organizations strengthen their position in competitive construction markets.