Summary
Overview
Work History
Education
Skills
Certification
Languages
LinkedIn
Timeline
Generic

Marcus Sherwin

Summary

Results-driven Account Executive with 10+ years of B2B enterprise sales experience across EMEA, with a consistent track record of exceeding revenue targets and building trusted C-Suite relationships. Proven ability to manage complex, multi-stakeholder sales cycles, develop strategic account plans, and drive expansion revenue through consultative value selling. Expert at translating business priorities into commercial outcomes across SaaS, AdTech, and data-driven platforms with deep experience owning full quota responsibility across large enterprise territories.

Overview

13
13
years of professional experience
1
1
Certification

Work History

EMEA Lead Enterprise Account Director

LinkedIn
Madrid
07.2019 - 09.2025
  • Owned and scaled a portfolio of large, multi-country B2B accounts across EMEA, managing the full commercial lifecycle from opportunity identification through contract close and renewal.
  • Built and executed long-term joint business plans with C-suite and VP-level stakeholders at global brands and agencies, driving consistent year-over-year ARR growth.
  • Led complex, multi-stakeholder negotiations across enterprise organisations, aligning platform capabilities to client commercial objectives and measurement priorities.
  • Acted as primary client interface for major platform updates, product launches, and strategic opportunities, deepening and expanding partnerships over time.
  • Collaborated cross-functionally with product, operations, and legal teams to deliver against client goals and shape platform roadmap based on aggregated client feedback.
  • 5% Globally at LinkedIn awarded presidants club FY24.

Adjunt Professor / Part Time

IE Business School
09.2022 - Current
  • Teach MBA & Undergrad courses on AI automation & data-driven decision making in marketing.

Managing Partner (Fractional)

Kleos Global
London | Madrid
09.2025 - Current

Sept 2025 - Present

  • Founded and scaled an enterprise AI & SaaS advisory practice, owning full net-new business development from discovery through close across Iberian and EMEA accounts.

Brand Partnerships Manager

TikTok
04.2021 - 08.2021
  • Drove enterprise GTM during TikTok's early European expansion — helping global brands and agencies navigate an entirely new creative format, building GTM playbooks in a high-ambiguity, fast-moving GenMedia environment.
  • Led C-Suite and agency conversations positioning TikTok's emerging creative platform capabilities, winning enterprise budgets by articulating transformational creative value over incumbents.
  • Demonstrated ability to move rapidly between executive strategy and tactical execution a core requirement for scaling GenMedia GTM in new markets.

Key Account Manager

Yieldr SaaS
Barcelona
01.2018 - 07.2019
  • Managed strategic airline accounts on a programmatic DSP, aligning platform AI and data capabilities to client commercial objectives and creative performance outcomes.
  • Delivered revenue growth through consultative, data-led account strategy and executive-level stakeholder management.
  • Built early fluency in AI-driven media buying and data-led creative optimisation foundational to current GenMedia advisory practice.

Account Strategist

Criteo
Barcelona
01.2015 - 12.2017
  • Managed Tier 1 global accounts across retail, travel, and classifieds — navigating complex enterprise buying groups and delivering consistent revenue performance.
  • Built core enterprise sales foundations: pipeline discipline, C-Suite engagement, and value-based selling in a competitive AI-powered ad tech environment.
  • Led executive QBRs translating AI-driven platform performance into clear business outcomes for senior stakeholders.

Key Account Manager

Exogroup
Barcelona
10.2013 - 04.2015
  • Managed a portfolio of key accounts with combined media spend exceeding €4.5M, driving revenue growth through programmatic media buying and campaign optimisation across CPL, COS and CPA targets.
  • Operated across a leading RTB and Ad Exchange network, developing strong foundations in digital commercial strategy and data-led performance management.

Education

Master of Business Administration (MBA) -

Universidad Carlos III de Madrid
Madrid, Area, Spain
01.2013

Bachelor of Arts (B.A.) - History & Classics

University College Dublin
Dublin Ireland
01.2008

Belvedere College S.J.
Dublin Ireland
01.2003

Skills

  • C-Suite Relationship Management
  • Complex Enterprise Sales Cycles
  • Quota Ownership & Forecasting
  • Cross-Sell & Upsell Growth

Certification

  • MBA UC3M Madrid
  • Bachelors Degree History UCD Dublin

Languages

English
Proficient
C2
Spanish
Proficient
C2

LinkedIn

www.linkedin.com/in/marcussherwin

Timeline

Managing Partner (Fractional)

Kleos Global
09.2025 - Current

Adjunt Professor / Part Time

IE Business School
09.2022 - Current

Brand Partnerships Manager

TikTok
04.2021 - 08.2021

EMEA Lead Enterprise Account Director

LinkedIn
07.2019 - 09.2025

Key Account Manager

Yieldr SaaS
01.2018 - 07.2019

Account Strategist

Criteo
01.2015 - 12.2017

Key Account Manager

Exogroup
10.2013 - 04.2015

Master of Business Administration (MBA) -

Universidad Carlos III de Madrid

Bachelor of Arts (B.A.) - History & Classics

University College Dublin

Belvedere College S.J.
Marcus Sherwin