Visionary Leadership Across Strategy, Marketing, and Technology
Growth Spectrum LLC combines strategic marketing, leadership coaching, delivery transformation, and IT governance to help organizations thrive without external crutches.
Meet Our Principals & Team
Leadership that balances vision, structure, culture, and execution.
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Donna Miller, Ed.D.
FOUNDING PRINCIPAL
💼Financial oversight, independence, viability. 💼
Donna founded Growth Spectrum LLC in 2018 to empower leaders through fractional consulting. Today, she serves as the financial principal, ensuring the firm’s independence, sustainability, and long-term viability. Her role provides the foundation that allows the team to focus on delivering transformational outcomes for clients.
Early Intervention Project Manager – Professional development trainings and workshops for MN and PA.
Adjunct Professor – Minnesota State University, Mankato, Special Education
M.Ed. Special Education - University of Minnesota & Ed.D. Educational Leadership - Hamline University
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Tim Biskup
PRINCIPAL BUSINESS COACH & CMO
🎯 Vision, Culture, Agency PMO, KPI 🎯
Tim brings three decades of marketing and MarTech leadership across Fortune 500 companies and high growth agencies. As Principal & CMO, he architects Growth Spectrum’s quadrant aligned coaching methodology, reframing vision and culture into systems leaders can own. HIs experience spans marketing, analytics, and delivery.
Instrumental driver of MYM&M’S® business growth from $500K to $80M annually in 3 years.
Scaled PMO team 5x, established global footprint, sustained 95% utilization.
Reduced client attrition by 50%, increased margin by 57%, and increased sales pipeline velocity by 300%
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Eric Nevalainen
PRINCIPAL IT CONSULTANT & CIO
🔒 AI Governance & Cybersecurity 🔒
Eric leads Growth Spectrum’s AI Governance & Cybersecurity practice. As Principal IT Consultant, he specializes in designing secure, compliant infrastructures that empower organizations to innovate confidently. With deep expertise in AI governance and cybersecurity, he ensures systems are resilient, brand‑safe, and aligned with long‑term growth.
Over 25 years in IT consulting, cybersecurity architecture, and governance frameworks for the military, large cap corporations, and SMB clients.
IAPP Artificial Intelligence Governance Professional (AIGP) & Google Certified Generative AI Leader
Developed and enforced network security policies in accordance with Dept. of Defense and Army standards and advised the State CIO on matters pertaining to network and computer security.
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Fractional Partners
SPECIALIZED EXPERTISE ON-DEMAND
🤝 App Development, AdTech, PR, Creative 🤝
Growth Spectrum LLC extends its impact through trusted fractional partners who bring specialized expertise in digital, analytics, and creative services. These collaborators allow us to scale capabilities flexibly, ensuring clients receive best‑in‑class support across every dimension of growth.
Jam Creative – Produces advanced websites, agentic AI apps, and mobile apps for large and small businesses.eNZed Marketing – provides intense AdTech and Marketing support, delivering precision insights and campaign optimization in multiple structures.
Freelance Specialists – provide brand narratives, media coverage, market research, and visual identity for numerous clients.
The Growth Spectrum Quadrant Framework
Every principal contributes to Vision, Structure, Culture, and Execution. They ensure transformation is holistic, sustainable, and measurable.
Beyond Business
Our Commitment to Community
We measure success not only by business outcomes, but by the impact we create in our communities. At Growth Spectrum, we believe leadership extends beyond the boardroom. Our principals and team actively support causes that reflect our values of inclusion, empowerment, and resilience.
Ready to Activate Growth with Clarity, Security, and Sustainability?
Full Bios of Team
Explore the Origin Story Behind the Leadership
Our principal fractional consultant is Tim Biskup
Tim Biskup is a visionary strategist and executive leader with over two decades of experience driving transformation across marketing, technology, and operations. Known for his ability to bridge systems thinking with creative execution, Tim has held senior roles including Chief Delivery Officer, CMO, VP Solutions, where he built scalable PMOs, launched disruptive marketing strategies, and led global teams across industries. His career spans Fortune 500 brands, high-value agencies, and entrepreneurial ventures, consistently delivering impact through data-driven innovation, customer-centric design, and operational clarity.
Tim’s leadership style blends emotional intelligence with decisive action. His developmental journey, from executor to strategist, is reflected in his coaching of high-performing teams, mentorship of emerging leaders, and mastery of frameworks like Kolbe, Lominger, and DISC. He’s praised for his ability to reframe challenges, energize cross-functional collaboration, and build systems that externalize complexity while amplifying team strengths. Whether scaling delivery models or navigating crisis communications, Tim leads with integrity, insight, and a relentless focus on outcomes and impact.
Beyond execution, Tim is a passionate facilitator and organizational diagnostician. He’s the architect behind Growth Spectrum’s quadrant-aligned coaching methodology, which integrates personality, strengths, and competencies into actionable development plans. His academic work and LinkedIn endorsements reflect a rare blend of intellectual horsepower, emotional depth, and strategic agility. Tim’s mission is to help leaders stop compensating and start activating, building the execution bridges that turn vision into reality.