S.TEH / CV 2026

Test section 01 · Live potential-flow simulation

Sebastian Teh

Trained as an aeronautical engineer. Now I fix how organisations run: operations, revenue and technology.

Tunnel controls

Move your cursor through the flow. Drag a thumb through the flow.

Scroll

00 / Brief

A generalist business leader across operations, revenue and technology. I improve how organisations work through better systems, clearer processes and execution.

Engineering-based problem solving, combined with commercial judgement. Based in London.

01 / Where I came from

I studied flow before I studied business.

Degree
B.Eng (Hons) Aeronautical Engineering, upper second (2:1)
Where
City St George's, University of London, 2017
Award
George Daniel Scholarship, in recognition of academic achievement
Dissertation
Multiphase Flow Analysis of Gear Pumps Using an Overset Meshing Method

A gear pump moves fluid by trapping it between the teeth and the casing. To simulate parts that turn through each other, an overset mesh lets a moving grid on each gear slide over a fixed background grid. That is the machine on this page. Turn it.

12 rpmDelivery 10%

Liquid Gas · Drag a gear

02 / What I have done

Range first. Then direction.

  1. Jul 2017 to Oct 2018 · London, UK

    Operations & Commercial Development

    Trade and distribution: fashion retail, then FMCG

    • Managed the UK distribution operation supplying a South African fashion retail chain.
    • Identified and championed a new warehouse technology solution, from business case through negotiation to implementation.
    • Moved into the FMCG trading business, building supplier and customer relationships across the UK and Ireland.

  2. Oct 2018 to Dec 2018 · Rotterdam, NL

    Business Development Representative

    Enterprise low-code software

    • Engaged enterprise stakeholders on software delivery and digital transformation challenges.
    • Qualified opportunities for low-code application development.

  3. Dec 2018 to Mar 2019 · Milton Keynes, UK

    Project Engineer

    Logistics and supply chain

    • Designed and implemented bespoke logistics and supply-chain solutions for clients.
    • Translated business requirements into operational processes across warehouse, technology, supplier and customer stakeholders.

  4. Sep 2019 to Jan 2020 · London, UK

    Business Development Executive

    Foreign exchange and international payments

    • Generated and qualified opportunities for foreign exchange, international payments and risk management.
    • Engaged prospective corporate clients and coordinated handover to specialist trading teams.

  5. Dec 2021 to May 2022 · London, UK

    Cabin Maintenance Planner (Contract)

    Airline cabin maintenance, Heathrow

    • Coordinated cabin maintenance schedules for a major airline's Heathrow fleet operations.
    • Aligned engineering resources, logistics and stakeholders to minimise disruption and keep aircraft service ready.

  6. Jun 2022 to Feb 2023 · London, UK

    Account Development Representative

    Enterprise software

    • Built and executed outbound campaigns that generated enterprise sales opportunities.
    • Supported multi-region account expansion within organisations under global master service agreements.

  7. Jul 2023 to Nov 2023 · London, UK

    Assistant Facilities Manager

    Multi-division property services group

    • Managed up to 30 concurrent facilities projects across multiple UK sites.
    • Delivered planned and reactive works on time and within budget, often under strict SLA commitments.

  8. Nov 2023 to Sep 2024 · London, UK

    Head of Revenue Operations

    Multi-division property services group

    • Built the revenue operations function from the ground up: HubSpot CRM, structured sales processes, reporting and performance management.
    • Led digital transformation across sales and customer service, including website redevelopment, AI-powered lead capture and workflow automation.
    • Took interim leadership of the sales function while recruiting and onboarding commercial leadership.

  9. Sep 2024 to Dec 2025 · London, UK

    Chief of Staff

    Multi-division property services group

    • Led cross-functional initiatives across property services, security, equipment hire and asset-backed lending.
    • Built executive reporting, KPI frameworks and data governance across four business divisions.
    • Drove commercial, operational and technology initiatives spanning CRM, automation, AI, revenue operations and organisational design.

  10. Dec 2025 to Present · London, UK

    Independent Business & Systems Consultant

    Sweet Lemon Group Ltd, my own company

    • Designed and implemented an integrated operating platform for a growing jewellery business: CRM, job management, invoicing, reporting, dashboards and automation in a single source of truth.
    • Facilitated commercial property transactions totalling approximately £2.3M, through to completion.
    • Advise SMEs on operational systems, process design and workflow automation.

Readings / From the record

  • £2.3M approx.

    Commercial property transactions facilitated through to completion, as an independent consultant.

  • 12 industries

    Fashion retail, FMCG, software, logistics, foreign exchange, aviation, property services, security, equipment hire, asset-backed lending, jewellery and commercial property.

  • 14 months

    From assistant facilities manager to Chief of Staff within one group, by way of building its revenue operations function.

  • 1 source of truth

    CRM, job management, invoicing, reporting, dashboards and automation for a growing jewellery business, consolidated into one platform I designed and implemented.

Off the clock / February 2025

Uhuru Peak

5,895m

Mount Kilimanjaro, Tanzania. The highest point in Africa, summited in February 2025.

Summit · Uhuru Peak · 5,895 m

03 / What I do now

Independent. Working on how businesses actually run.

Since December 2025 I have worked as an independent business and systems consultant through Sweet Lemon Group Ltd, with small and growing businesses.

See how I work with businesses

  1. One platform for a growing jewellery business

    Designed and implemented an integrated operating platform: CRM, job management, invoicing, reporting, dashboards and automation, consolidated into a single source of truth.

  2. Commercial property transactions

    Facilitated transactions totalling approximately £2.3M: coordinating stakeholders, facilitating negotiations and driving each one through to completion.

  3. Advice for SMEs

    Operational systems, process design and workflow automation, to improve efficiency and scalability.

  4. Still studying

    The Augment MBA, Augment Business School (2025 to present). Level 3 Counselling Skills, Heartwood (part-time weekend study, in progress).

04 / Core skills

AOperations & transformation

  • Business operations & process improvement
  • Systems design & implementation
  • Business & digital transformation
  • Change management
  • Project delivery

BCommercial & leadership

  • Revenue operations
  • Business development
  • Stakeholder management
  • Cross-functional leadership
  • Operational leadership

CData & technology

  • Business analysis
  • Data & KPI reporting
  • Automation & AI workflows

Stack / What I work with today

AI & agents

  • Claude Code
  • Codex
  • ChatGPT
  • Gemini
  • Granola
  • Self-hosted AI agent (Hermes)

Automation & data

  • Python
  • PostgreSQL
  • Google & Microsoft APIs
  • Make.com
  • Power Automate
  • n8n
  • Telegram bots

Build & hosting

  • Astro
  • JavaScript & Canvas
  • Git & GitHub
  • Cloudflare Pages
  • Linux VPS
  • Tailscale

Business systems

  • HubSpot
  • Google Workspace
  • Microsoft 365
  • Excel
  • Obsidian

Certified Google Ads Search Certification, Google (Feb 2024). SEO Certified, HubSpot Academy (Mar 2024).

05 / How this page works

Solved, not faked.

The flow

The background is a potential-flow solution, the first thing an aerodynamicist learns. Every heading the lines bend around is a Rankine oval: a source and a sink placed in a uniform stream. Your cursor is a cylinder: a doublet, plus a vortex when you add spin. The arrows now on screen are the velocity field itself.

ψ = U·y + m2π(θ₁ − θ₂)

The method

Nothing is animated in the usual sense. Each frame, every streamline is integrated again from the left edge with a second-order step, so the picture is a pure function of scroll, pointer and time. Any state can be redrawn on demand, which is also how it was tested.

Streamlines
0
Field evaluations per frame
0
Solve and draw
0.0 ms

The build

Astro, static HTML, hand-written Canvas 2D. No animation library, no images, no trackers and no cookies. Fonts are self-hosted. Phones get the whole thing, recomposed. If you prefer reduced motion the page stops moving and loses nothing.

Spin is real too: lift follows the Kutta–Joukowski theorem, so the CL readout in the controls is the number a wind tunnel would give you.

06 / Contact

Let's talk.

A role, a project or a problem that keeps coming back. Email or LinkedIn, whichever you prefer.