eutonic.
C o n s u l t i n g

An independent advisory for growth-stage ecommerce and consumer brands, navigating the productive tension between strategy, operations, and execution.

Strategy and execution for the decisions that define the next stage of a consumer brand.

Three ways we typically work. Most engagements start as one and evolve.

Project sprints

4–8 weeks

Focused work on a defined question: platform selection, marketplace entry, org design, or an investor narrative. Clear scope, fixed fee, a deliverable you can act on.

Fractional operator

3–6 months

Embedded leadership during a transition, platform migration, or leadership gap. Typically 20–40 hours per week with P&L accountability for the initiative you own.

Advisory retainer

Ongoing

Executive counsel for founders and leadership teams — structured as bi-weekly strategy sessions plus async access between meetings.

Led by an operator, not a deck-builder.

Eutonic is led by Brian Thornfeldt — 25+ years of consumer and ecommerce operating experience, including 12+ years at Wayfair (VP / GM), Director of DTC at Thrasio, and Co-Founder / CMO of Smilo Baby. The work across those roles shares a common thread: building the operating infrastructure that lets a consumer brand grow without breaking.

  • Experience20+ years in consumer & ecommerce; VP/GM, DTC, and founder roles
  • EducationMBA, Northeastern University (Beta Gamma Sigma); B.A. Economics & Art, Hamilton College
  • BasedGreater Boston · remote/hybrid engagements · working globally
  • InsuranceCommercial General Liability — Hiscox

Starting with a conversation.

Office
Eutonic Consulting
365 Boston Post Rd., Suite 202
Sudbury, MA 01776 · USA