Freelancer profile translated to English.
Back to original languageAbout Nathan
I am a consultant specializing in **B2B Lead Generation, Cold Email, and Outbound Growth**, with an approach based on data, buying signals, and intelligent automation.
I help founders and sales teams build high-performing and scalable B2B acquisition systems capable of predictably generating qualified opportunities.
My approach is not limited to sending emails.
I design complete acquisition machines:
• Definition and fine segmentation of the ICP
• Building targeted databases via Clay, Sales Navigator, or Apollo
• Exploiting intent signals and behavioral data
• Multichannel B2B prospecting (Cold Email, LinkedIn, personalized sequences)
• Personalization at scale via AI (Claude.ai, Claude Code)
• Workflow automation (HubSpot, n8n, Zapier, Make)
• CRM and Sales Operations structuring
• Continuous funnel optimization (response rates, meetings, pipeline)
I integrate AI, particularly through Claude Code, into acquisition processes to:
• Prioritize high-potential accounts
• Generate personalized messages based on real signals
• Improve lead scoring and qualification
• Accelerate iterations while maintaining a qualitative approach
I have supported over 200 B2B companies, startups, and large corporations, including: PhantomBuster, Wecandoo, Axa Climate, Bouygues Construction, ReachFive, Scalezia…
My positioning: transforming your data and market signals into concrete business opportunities.
Tools used daily: Claude.ai, Clay, HubSpot, Sales Navigator, Lemlist, La Growth Machine, n8n, Make, advanced enrichment and automation tools.
If you want to structure or accelerate your B2B acquisition with a smarter approach than simple outreach, let's talk.
My LinkedIn: /nathanguillaumin
My phone number: {07|86|83|67|83}
French
Native or bilingual
English
Fluent
Spanish
Fluent
Remote only
Primarily works remotely
Experience
- PhantomBusterLead Growth PartnerSOFTWARE PUBLISHINGMarch 2025 - March 2026 (1 year)Paris, FranceAs a Lead Growth Partner at PhantomBuster, I supported B2B clients (founders, sales and growth teams) onB2B lead generation, outbound, and marketing and CRM automationchallenges.My role was both operational and educational: helping clients design, deploy, and improve scalable prospecting and growth systems.My main responsibilities:
- Supporting B2B clients on advanced lead generation and outbound use cases
- Coaching on cold email, LinkedIn prospecting, and multichannel strategies
- Designing and optimizing automation workflows for prospecting
- Leading webinars and office hours on lead generation, outbound, and automation
- 1-on-1 support with strategic clients to improve adoption and performance
- Contributing to account growth and customer churn reduction
Through this value and results-oriented support, I contributed to PhantomBuster's growth from €8M to €13M ARR, by fostering product adoption, value creation, and usage expansion.This experience allowed me to strengthen concrete expertise in **B2B lead generation, outbound growth, cold email, and prospecting automation**, on real and varied client cases. - Nathan GuillauminB2B Growth Marketing, Lead Generation, Outbound Growth B2BTELECOMMUNICATIONSJanuary 2019 - Today (7 years and 5 months)Paris, FranceAs a freelancer,I support B2B companies(founders, sales and marketing teams) **on B2B lead generation, outbound growth, and cold email challenges**, with a system- and performance-oriented approach.I help my clients structure and deploy effective and scalable prospecting strategies, combining data, automation, and sales best practices.My responsibilities include:
- Defining and implementing B2B lead generation strategies
- Sourcing, enriching, and qualifying leads
- Implementing outbound strategies: cold email, LinkedIn prospecting, multichannel sequences
- Optimizing cold email deliverability, open, and response rates
- Automating prospecting and sales & marketing workflows
- Structuring and optimizing CRM (HubSpot) and prospecting tools
- Coaching and supporting teams on outbound best practices
I have supported over 200 B2B companies, startups, and large corporations, on **commercial prospecting, outbound growth, automation, and B2B acquisition topics**, with the goal of generating qualified leads and a sustainable sales pipeline.My approach is very operational: I design, implement, and optimize prospecting systems with the teams, while training them to gain autonomy. - LeadixGrowth Outbound ManagerDIGITAL AND ITSeptember 2023 - May 2025 (1 year and 8 months)Paris, FranceAt Leadix, I was responsible for thedesign and deployment of B2B outbound strategiesfor our clients, with a strong focus on **lead generation, commercial prospecting**, and campaign performance.My role was to **structure effective outbound approaches**, based on data, targeting, and messages adapted to the clients' ICPs.My main responsibilities:
- Defining B2B lead generation and outbound strategies adapted to business objectives
- Sourcing, enriching, and qualifying leads
- Implementing cold email and LinkedIn prospecting campaigns
- Creating and optimizing outbound sequences (copywriting, targeting, iteration)
- Analyzing performance and continuously optimizing campaigns
- Collaborating with client teams to adjust messages and sales priorities
I worked on **outbound projects for several B2B clients**, particularly in services and consulting, with the goal of generating qualified leads and feeding the sales pipeline.This experience allowed me to strengthenfield expertise in B2B prospecting, outbound growth, cold email, and structuring lead generation campaigns.
Reviews
Florent
Coudac
Several days project
-
Reviewed on 8/21/2025
Nathan assisted me for a month in setting up an outbound strategy. His skills are broad yet specialized. We were able to work together hands-on to build and enrich a contact list, as well as in writing sequences. I recommend him 100%!
Léa
digiberries
Reviewed on 9/16/2021
Nathan is very professional and responsive, I recommend him 100%!
Recommendations
+3
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Education
- Web and Mobile Web DeveloperWild Code School2020Scraping, création de scripts, landing pages, automatisations, API
- Master in Management - Grande Ecole ProgramGrenoble Ecole de Management2019Marketing, Management, Génération de leads, Acquisition digitale
Certifications
- Generate infinite growth through a scalable channel: Facebook AdsGerminal2021
- Acquisition SystemsGerminal2021