Max Münstermann 🫴
Founder @ closedin.io | GTM engineer - Reach Your ICP More Effectively
GTM Engineer turning Clay, Instantly and LinkedIn into revenue engines. At closed:in we act as your GTM engineering partner.
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We design, build and optimize full outbound systems for B2B brands. From Clay powered data enrichment and segmentation to Instantly driven email engines and LinkedIn workflows that actually get replies. Our stack blends automation, personalization and creativity into one predictable revenue engine. Whether it’s mapping your ICP, crafting smart multichannel campaigns or scaling from 100 to 100000 contacts, we make sure your GTM motion runs like code. ✅ Clay for data and segmentation ✅ Instantly for multi inbox email automation ✅ LinkedIn for trust and human connection We call it engineering your outbound, not guessing it. If you are a B2B founder or marketer who wants to build a repeatable growth engine, let’s talk. 👉 Message me here or visit io
GTM Index
- CLAYJOB
- Clay Partner1Y 1M
Clay Partner
Clay
https://www.clay.com/experts/partner/closedin
- INSTANTLY.AIJOB
- Certified Instantly Expert1Y 1M
Certified Instantly Expert
Instantly.ai
https://instantly.ai/experts/max-munstermann
- DEEKIEJOB
- Mede-eigenaar3Y 2M
Mede-eigenaar
Deekie
- APOLLO.IOJOB
- Apollo Certified Partner6M
Apollo Certified Partner
Apollo.io
- CLOSED:INJOB
- Founder1Y 8M
Founder at closed:in | GTM engineer - Reach Your ICP More Effectively
closed:in
As the founder of closed:in, I help B2B companies get qualified leads through highly targeted outbound campaigns with tools like Clay and Instantly. No spam, no generic templates, no scattergun approach where everything goes wrong. Just laser-targeted outreach that results in warm leads. Only meetings in the inbox. We take over your entire outbound operation, including: 🔹 ICP analysis 🔹 Waterfall enrichment 🔹 Personalized copy No templates. No fluff. Just results. If you're a B2B founder or marketer looking to consistently get conversations with your ideal customer in your inbox... 👉 Send me a message or visit www.closedin.io
- FLOWKEYJOB
- Sourcing & Procurement Con…5M
Sourcing & Procurement Consultant
Flowkey
As a Sourcing & Procurement Consultant at Flowkey, I help hotels purchase essential products at lower prices. We handle the entire sourcing process, from manufacturer contact to quality control. By partnering with trusted suppliers in Europe, China, and Turkey, we ensure hotels can save without compromising on quality. With our no cure, no pay model, we provide risk-free solutions that deliver immediate cost savings.
- UNIVERSITY OF AMSTERDAMSCHOOL
- Master of Science - MS, En…1Y 3M
Master of Science - MS, Entrepreneurship (joint degree)
University of Amsterdam
- VRIJE UNIVERSITEIT AMSTERDAM (VU AMSTERDAM)SCHOOL
- Master of Science - MS, En…1Y 3M
Master of Science - MS, Entrepreneurship (joint degree)
Vrije Universiteit Amsterdam (VU Amsterdam)
- VAMPJOB
- Mede-oprichter8M
Mede-oprichter
VAMP
As a co-founder of VAMP, I played a pivotal role in establishing and growing the company from inception to success. My responsibilities encompassed strategic planning, business development, and overseeing day-to-day operations. By fostering a collaborative team environment and driving innovation, I helped VAMP achieve significant milestones. After a period of reflection, I realized my passion lay in a different career path. Consequently, I decided to exit the company by selling my shares to one of the other co-founders, confident in the strong foundation we built together.
- UNIVERSITEIT UTRECHTSCHOOL
- Bachelor's degree, Psychol…4Y 11M
Bachelor's degree, Psychology
Universiteit Utrecht
- BRANDSOMJOB
- Sales Mgr6M
Sales Manager
Brandsom
In my role as Sales Manager at Brandsom, I drove business growth and client acquisition in the eCommerce sector. Leveraging my deep understanding of marketplace integrations, strategic sales techniques, and online marketing, I successfully expanded our client base, fostered strong relationships, and contributed to the company's overall success in the competitive eCommerce landscape.
- Integrator specialist1Y 4M
Integrator specialist
Brandsom
At Brandsom, I excelled as an Integrator Specialist, working with leading platforms such as ChannelEngine, Tradebyte, and major marketplaces like Amazon, Zalando, and bol.com. My expertise in integrating complex systems and streamlining processes enabled clients to expand their online presence and optimize their eCommerce operations.
- HKUST BUSINESS SCHOOLSCHOOL
- Business4M
Business
HKUST Business School
- E-DRIVERS PRIVECHAUFFEURSJOB
- Privéchauffeur5M
Privéchauffeur
E-Drivers Privechauffeurs
As a private chauffeur, I provided high-quality, reliable transportation services to clients, ensuring their comfort, safety, and punctuality. My attention to detail and commitment to excellence allowed me to offer a premium experience, whether for business engagements or personal commitments.
- ACTEURSBUREAU KAPOKJOB
- Trainingsacteur10M
Trainingsacteur
Acteursbureau Kapok
As a professional training actor, I specialized in creating realistic and engaging scenarios to facilitate effective learning and development. My role involved working closely with organizations to simulate real-world situations, enhancing communication, conflict resolution, and customer service skills through interactive and practical training sessions.
- HET AMSTERDAMS LYCEUMSCHOOL
- VWO6Y 11M
VWO
Het Amsterdams Lyceum
- Job: Brandsom — Integrator specialist · 2021-12 – 2023-04 · 1y 4mo — At Brandsom, I excelled as an Integrator Specialist, working with leading platforms such as ChannelEngine, Tradebyte, and major marketplaces like Amazon, Zalando, and bol.com. My expertise in integrating complex systems and streamlining processes enabled clients to expand their online presence and optimize their eCommerce operations.
- Job: Clay — Clay Partner · 2025-09 – present · 11 mo — https://www.clay.com/experts/partner/closedin
- Job: Instantly.ai — Certified Instantly Expert · 2025-09 – present · 11 mo — https://instantly.ai/experts/max-munstermann
- Job: VAMP — Mede-oprichter · 2023-10 – 2024-06 · 8 mo — As a co-founder of VAMP, I played a pivotal role in establishing and growing the company from inception to success. My responsibilities encompassed strategic planning, business development, and overseeing day-to-day operations. By fostering a collaborative team environment and driving innovation, I helped VAMP achieve significant milestones. After a period of reflection, I realized my passion lay in a different career path. Consequently, I decided to exit the company by selling my shares to one of the other co-founders, confident in the strong foundation we built together.
- Job: E-Drivers Privechauffeurs — Privéchauffeur · 2021-08 – 2022-01 · 5 mo — As a private chauffeur, I provided high-quality, reliable transportation services to clients, ensuring their comfort, safety, and punctuality. My attention to detail and commitment to excellence allowed me to offer a premium experience, whether for business engagements or personal commitments.
- Job: Flowkey — Sourcing & Procurement Consultant · 2024-09 – 2025-02 · 5 mo — As a Sourcing & Procurement Consultant at Flowkey, I help hotels purchase essential products at lower prices. We handle the entire sourcing process, from manufacturer contact to quality control. By partnering with trusted suppliers in Europe, China, and Turkey, we ensure hotels can save without compromising on quality. With our no cure, no pay model, we provide risk-free solutions that deliver immediate cost savings.
- Job: Brandsom — Sales Manager · 2023-04 – 2023-10 · 6 mo — In my role as Sales Manager at Brandsom, I drove business growth and client acquisition in the eCommerce sector. Leveraging my deep understanding of marketplace integrations, strategic sales techniques, and online marketing, I successfully expanded our client base, fostered strong relationships, and contributed to the company's overall success in the competitive eCommerce landscape.
- Job: Deekie — Mede-eigenaar · 2023-08 – present · 3y
- Job: Apollo.io — Apollo Certified Partner · 2026-04 – present · 4 mo
- Job: Acteursbureau Kapok — Trainingsacteur · 2021-01 – 2021-11 · 10 mo — As a professional training actor, I specialized in creating realistic and engaging scenarios to facilitate effective learning and development. My role involved working closely with organizations to simulate real-world situations, enhancing communication, conflict resolution, and customer service skills through interactive and practical training sessions.
- Job: closed:in — Founder at closed:in | GTM engineer - Reach Your ICP More Effectively · 2025-02 – present · 1y 6mo — As the founder of closed:in, I help B2B companies get qualified leads through highly targeted outbound campaigns with tools like Clay and Instantly. No spam, no generic templates, no scattergun approach where everything goes wrong. Just laser-targeted outreach that results in warm leads. Only meetings in the inbox. We take over your entire outbound operation, including: 🔹 ICP analysis 🔹 Waterfall enrichment 🔹 Personalized copy No templates. No fluff. Just results. If you're a B2B founder or marketer looking to consistently get conversations with your ideal customer in your inbox... 👉 Send me a message or visit www.closedin.io
- School: University of Amsterdam — Master of Science - MS, Entrepreneurship (joint degree) · 2023-09 – 2024
- School: Vrije Universiteit Amsterdam (VU Amsterdam) — Master of Science - MS, Entrepreneurship (joint degree) · 2023-09 – 2024
- School: HKUST Business School — Business · 2022-09 – 2023-01
- School: Universiteit Utrecht — Bachelor's degree, Psychology · 2019 – 2023
- School: Het Amsterdams Lyceum — VWO · 2012 – 2018
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