Model & Automation Consultant; SOW Engagement

Engagement Type:
Outside IR35 / B2B Services Agreement

Deliverables:
Fixed-scope consultancy project (estimated 8-week duration)

Cambridge Spark is looking for an independent consultant to design, cost-model, build and document an updated sales commission framework and automated calculation engine for 2027.

This is a deliverable-driven project requiring end-to-end ownership. Strategic intent is set by leadership; the consultant will be fully responsible for the technical design, financial modelling, automated build and handover of the system.

• Design the 2027 commission framework (rates, thresholds, accelerators, product weighting, shared-credit rules and leaver/joiner logic).
• Model plan costs, OTE scenarios and affordability in collaboration with Finance to produce a sign-off-ready commercial proposal.
• Draft and finalise the official commission policy document aligned with the underlying data logic.

• Architect and build the end-to-end calculation engine using SQL views over a cloud data warehouse, custom Hub Spot properties/reporting, Google Sheets, Apps Script and  integrations.
• Reduce existing manual processing by automating the data transformation and calculation flow (currently ~50 manual workbooks).
• Ensure full auditability, attribution logic and automated reconciliation capabilities.

• Execute the interim monthly calculation and payout reconciliation cycles during the 8-week project window to validate live data accuracy.
• Produce complete documentation, logic maps, edge-case protocols and an operational runbook for the internal team.

• Milestone 1 (Week
  2):
  Current process audit complete; operational cycle baseline established.
• Milestone 2 (Week
  4):
  Draft model design and initial financial costings delivered for review.
• Milestone 3 (Week
  6):
  Finalised model and cost projections signed off for 2027 budget alignment.
• Milestone 4 (Week
  8):
  Automated calculation engine built, tested, fully documented and handed over.

• Deep expertise designing, modelling and executing complex incentive/commission structures (tiered accelerators, ramp, proration, clawbacks).
• Advanced technical stack proficiency: SQL, Google Sheets/Excel, Hub Spot administration,  (webhooks/APIs) and Apps Script.
• Strong commercial/financial modeling capability (cost-of-plan and scenario modeling).
• Ability to operate autonomously and deliver outcomes from day one without an onboarding period.
• Desirable:
  Familiarity with Xero, Fivetran/ELT workflows or revenue models in education/skills sectors.

• Deliverable Basis:
  Engagement is strictly based on the delivery of the specified milestones above.
• Substitution:
  The service provider retains the contractual right to send a qualified substitute subject to equivalent skills and security checks.
• Working Method:
  The consultant retains autonomy over how, when and where the deliverables are completed, subject to agreed project milestones and client integration points.
• Equipment & Risk:
  The consultant is expected to provide their own equipment and rectify any defective deliverable work at their own expense.