Stay with Sidney Rees
Use this path for technology direction, vendor control, roadmap ownership, delivery governance, and executive decision support.
Book a DiagnosticWhat I Do
Services
Fractional leadership with hands-on execution — CTO-level decisions, PMO discipline, and practical delivery in one engagement.
Capabilities
Leadership, delivery, and specialist execution where growth needs them.
Engagements are shaped around the constraint—not a generic package. I can own the technology direction, restore delivery control, or lead a focused intervention alongside your existing team.
01
Fractional CTO
- Architecture reviews & tech stack decisions
- Vendor evaluations & risk assessment
- Scalability planning
02
PMO & Project Delivery
- Project planning & team coordination
- Agile / Scrum delivery methodologies
- Timeline & budget management
03
eCommerce Development
- WooCommerce, Shopify, Medusa.js, Saleor
- Custom integrations
- Payments — MercadoPago, Stripe, PayPal
04
Agentic AI
- AI agents for customer and operational workflows
- Retrieval, reasoning, and tool integrations
- Human oversight, guardrails, and evaluation
05
Automation
- eCommerce process and data workflows
- n8n, APIs, and system integrations
- Reduce repetitive work and operational errors
06
Tech Consulting
- CTO advisory
- Digital product strategy
- Vendor selection & roadmap definition
Ecosystem routing
The right home depends on the business problem.
Sidney Rees stays focused on senior technology ownership for eCommerce. When the need is more specialized, the ecosystem routes the work to the better-fit operating company.
Go to Sigma Reef
Use this path for CRO, AOV, retention, lifecycle, Klaviyo, subscriptions, diagnostics, and implementation for DTC Shopify brands.
Visit Sigma ReefGo to Cadence Ridge
Use this path for broader SMB workflow automation, internal apps, dashboards, approvals, reporting, and practical AI systems.
Visit Cadence RidgeAgentic AI and Automation are related, but not interchangeable.
Agentic AI is for systems that need reasoning, tool use, retrieval, evaluation, and human escalation. Automation is for deterministic workflows, integrations, dashboards, and repeatable handoffs where reliability matters more than autonomy.
The Model
Three leadership models. One should match the gap you actually have.
A growing company may need technical direction, delivery leadership, or one accountable person connecting both.
Direction
Fractional CTO
Best when the company needs senior technical judgment but already has reliable delivery ownership.
- Technology strategy and roadmap
- Architecture and platform decisions
- Security, scalability, and vendor risk
Execution
Fractional PMO / Head of PM
Best when priorities are known but projects, teams, vendors, and deadlines need stronger control.
- Portfolio and project governance
- Prioritization, planning, and reporting
- Risk, dependency, and stakeholder management
The hybrid advantageDirection + execution
Fractional CTO+PMO
Best when technology decisions and delivery performance are inseparable—which is true for most growing eCommerce companies.
- One owner from business objective to delivery
- Strategy validated against operational reality
- Faster decisions with fewer handoff failures
Why Hybrid Works
The person shaping the plan remains accountable for making it work.
Traditional advisory often ends with a roadmap. Traditional project management can deliver efficiently against the wrong priorities. The hybrid model closes that gap.
I translate commercial goals into technology decisions, then establish the ownership, cadence, and controls required to execute them. Your team keeps its specialists; the business gains senior leadership across the whole system.
One accountable owner
No ambiguity between who defines the direction and who protects delivery. Decisions have an owner from boardroom to backlog.
Less executive overhead
Leadership gets concise decisions, risks, and progress—not the burden of coordinating developers, agencies, and vendors.
Earlier risk detection
Architecture, budget, dependencies, and delivery signals are reviewed together before small issues become expensive delays.
Flexible seniority
Add CTO and Head of PM capability at the stage you need it, without prematurely carrying two full-time executive roles.
When It Creates Value
Built for the point where informal coordination stops scaling.
You do not need a larger management layer. You need clearer decisions, visible ownership, and a delivery system that can support the next stage of growth.
You may be here now
Growth is exposing operational cracks
- Founders are still the escalation point for every technical decision.
- Projects move, but priorities, ownership, and business impact remain unclear.
- Internal teams and external vendors optimize their part instead of the whole.
- Architecture and process decisions are becoming harder and more expensive to reverse.
The operating change
Technology becomes a managed business capability
- A prioritized roadmap connects investment to commercial outcomes.
- Projects have accountable owners, measurable milestones, and explicit risks.
- Teams and partners work within one decision and delivery framework.
- Leadership knows what is happening, what needs a decision, and what comes next.
Accepting selected fractional and project engagements
Choose the right engagement
Start with the problem—not a predefined package.
We'll identify what is actually blocking the business and decide whether it needs a focused project, ongoing fractional ownership, or a different solution entirely.
Diagnostic before scopeFixed project or retainerScope and pricing in writing