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Experience & Skills

10+ years of B2B growth marketing across AI, SaaS, FinTech, and Crypto: first growth hire, then Head of Growth leading teams across 3 markets, through Series B, Series C, and a $3.3B IPO.

Hands-on and analytical across demand generation, account-based marketing, integrated campaigns, paid media, SEO, product marketing and marketing technology, because in every role I have built it rather than briefed it out. Growth programs get built to a measurable pipeline and revenue number.

Currently based in UAE/GCC, building growth systems with AI that let a lean team run like a full growth and marketing department.

United Arab Emirates hello@donatassimkus.com Record updated September 2026

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Career Timeline

Head of Growth & AI

Jul 2025 - Present
ai71 logo

ai71 · Enterprise & Government AI · Abu Dhabi, UAE

Reports to the Chief AI Advisory and Business Officer, Director of Marketing, and Director of Commercial

  • Automated about 70% of the day-to-day growth work with agents and automations: rebuilt marketing on an agentic operating model, shifting from manual execution to designing the systems that run it [See AI skills]
  • Deployed an AI system that monitors government partnership activity across countries from public data, alerting the commercial team in real time to act on new opportunities
  • Delivered the marketing side of a year that hit 92% of its annual revenue target by mid-year
  • Own the 2027 growth plan for Ask, the flagship product: the target account list, the outreach system across LinkedIn, email and events, and the forecast model behind the annual revenue target, from conversation volumes through opportunities to wins
  • Took roughly $155K a year of agency scope in-house across website, SEO, design and social on self-built systems, keeping agencies only for specialist work like film production

Fractional Head of Growth & AI

Jul 2024 - Jul 2025
Growth Ninja Group logo

Growth Ninja Group · B2B Growth & AI · United Arab Emirates

Worked directly with founders, CEOs, and CMOs

  • Led a delivery team of 3, plus 5 freelancers and agency partners, across 30+ AI automation and GTM engagements, 10+ of them major, spanning B2B SaaS, e-commerce, crypto, real estate, and medical
  • Built an outbound automation system that generated and closed a $3M client deal
  • Implemented an AI-powered CRM with omnichannel follow-up (email, WhatsApp, voice agents), cutting response time by 95% and sales cycles by 28%
  • Launched a beauty marketplace in Dubai with a full GTM strategy and 10+ monetization channels. Its listing pages did not rank at launch: I found the routing defect a paid contractor could not, rebuilt the technical layer, and rankings returned within 3 to 4 months [Case study]
  • Generated 23K+ qualified leads through AI-driven outbound automation

Head of Growth

May 2023 - Jul 2024
Phoenix Group logo

Phoenix Group · Crypto & Blockchain · United Arab Emirates

Reported to the Chief Sales Officer and CEO

  • Joined pre-IPO to lead growth strategy and digitally transform the marketing function, for a $370M raise at a $3.3B valuation
  • Ran the retail-investor campaign that closed 180x oversubscribed, securing 40+ media placements [Case study]
  • Directed the corporate rebrand and launched the new website in 11 days ahead of the public listing
  • Shipped the UAE's first cloud mining platform with iOS/Android apps in 5 weeks, which sold $1M+ in mining plans, with dynamic pricing and a live BTC ROI calculator [Case study]
  • Led a cross-functional team of 7 across marketing, sales, and product

Head of Growth

Contract
Dec 2022 - May 2023
Quiqup logo

Quiqup · Delivery & E-commerce · United Arab Emirates

Reported to the CEO and VP of Product

  • Returned to Quiqup to launch the marketing/growth department and establish strategic direction for the transformation from delivery service to post-purchase and e-commerce fulfillment platform [Case study]
  • Increased inbound sales opportunities by 67% through Google Ads optimization and conversion funnel work
  • Implemented an ABM program that accelerated B2B pipeline velocity by 35%, and supported leadership with an investment pitch deck
  • Ran weekly experimentation sprints that improved core KPIs (CAC, conversion, ARPA) by 25%
  • Secured 18 keywords ranking in the top 3, 16 of them commercial-intent, plus 61 in the top 10, on the Semrush position-tracking export from my last week

B2B Growth Lead

Jun 2021 - Dec 2022
Koinly logo

Koinly · FinTech & Crypto Tax SaaS · London, UK

Reported to the CMO

  • Led global B2B growth strategy across USA, UK, Canada, and Australia markets with a data-driven experimentation framework (2-3 weekly tests) with 30-40% success rate
  • Onboarded 2,000+ global accountants in 12 months [Case study]
  • Generated 4.2x ROAS at $19 per SQL, managing $500K of paid campaigns across 3 channels: Google Ads, LinkedIn Ads, and sponsored emails
  • Cut customer acquisition costs by 20%, running B2B acquisition largely solo and mentoring 1-2 growth hires
  • Drove 300+ qualified accountant leads from industry events and speaking slots, converting at 15% to paying clients

Head of Growth

Feb 2020 - Jun 2021
parcelLab logo

parcelLab · B2B SaaS · London, UK

Reported to the CMO

  • Promoted into global growth leadership, directing international strategy and scaling teams into the European and US markets, and running the test that ruled the Middle East out
  • Led growth teams across 3 markets, developing specialists in acquisition, retention, and analytics
  • Ran enterprise ABM programs (one-to-one, one-to-few, one-to-many) that lifted average deal size by 34%
  • Grew revenue 13% while cutting cost per qualified lead by 30%
  • Provided the growth metrics and positioning behind a $112M Series C

Growth Marketing Manager

Mar 2018 - Feb 2020
parcelLab logo

parcelLab · B2B SaaS · London, UK

Reported to the COO and Head of Sales (Northern Europe)

  • First growth hire in the UK, building the growth function behind parcelLab's Series B
  • Drove a 125% increase in conversion rates through B2B demand generation across Google, LinkedIn, and Meta, generating 60% of the sales pipeline
  • Sourced 5 enterprise wins worth $2M+ in new business through a strategic ABM program [Case study]
  • Directed the creative for a personalised video campaign: 2,000 individually rendered videos carrying each recipient's name, company logo and job title on-screen, delivered behind a QR code and wired to alert sales the moment one was watched
  • Tripled lead generation efficiency while cutting cost per lead by 40% with data enrichment and automated outreach [Case study]
  • Implemented HubSpot marketing automation, cutting the sales cycle by 15%

Senior Marketing Executive

Jul 2016 - Mar 2018
Quiqup logo

Quiqup · Delivery & E-commerce · London, UK

Reported to the Head of Marketing

  • Led digital marketing strategy supporting a $26M Series B, running agencies and performance marketing campaigns
  • Improved organic keyword rankings by 30% through a technical SEO strategy run with agency partners
  • Managed the website rebrand and migration to a headless CMS while preserving SEO value and site performance

Education

Diploma of Higher Education (DipHE), Business Economics

London Metropolitan University

2014 to 2016

Member of Economics, Bloomberg and Forex Societies

Certifications

CXL: Growth Marketing Certified
HubSpot Academy: Inbound Certificate
SEMrush: Technical SEO
SEMrush: Advertising Toolkit
LinkedIn Learning: Advanced Product Marketing
Agile Marketing Foundation
View all certificates

CV

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Skills

Go-to-Market (GTM) Strategy Demand Generation Account-Based Marketing (ABM) Revenue Operations Marketing Operations (MarTech) Integrated Campaign Management Product Marketing Performance Marketing Paid Media SEO / SEM / AIO Conversion Rate Optimization (CRO) Marketing Analytics & Attribution CRM & Lifecycle Marketing AI Agents & Automation Growth Experimentation Team Leadership Capital Markets & IPO Campaigns

LinkedIn

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