INTERNSHIP DETAILS

Marketing Science Intern

CompanyCritical Mass
LocationLondon
Work ModeOn Site
PostedFebruary 19, 2026
Internship Information
Core Responsibilities
The intern will gain an understanding of how Marketing Science contributes to client offerings, assisting in developing innovative products and deliverables. A major objective is to perfect existing skills and learn new measurement methods and tools to organize data meaningfully.
Internship Type
full time
Company Size
1847
Visa Sponsorship
No
Language
English
Working Hours
40 hours
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About The Company
We’re Critical Mass. We are 2,000 inspired humans across 14 offices, setting the right path—not just the next one—for our clients, their customers, and our own colleagues. We work with the best, Apple, Adobe, BMW, Nike, Diageo, Airbnb, BNY and many more, to power connected ecosystems that make brands stand out by driving performance with data, technology, AI, creative and media. We’re a global marketing agency founded in Canada, but digital is our home. If you know us, then you know we’re a special place that attracts big talent and tiny egos. We’re driven, uncompromising and we live our values. We’re Critical Mass, but our friends call us CM. Learn more at criticalmass.com.
About the Role

Critical Mass’ Internship opportunities are part of our Trailhead Program and provide a 12-week jump-start to your career. The program is designed to fast-track your growth through regular learning opportunities, mentorship, and hands-on client work - all while earning a competitive stipend. You’ll get a firsthand look at the exciting work we do at Critical Mass and experience what it’s like to be an integral part of our team. This internship gives you the chance to explore the digital agency world and client projects to see if it’s the right fit for you.

Our internship will run from May 26 – August 14. 

Our new hires & employees are the future of our organization, and we want to set you up for long-term success. In an effort to do so, we expect our team to work from an office a minimum of three days per week.


As the Marketing Science Intern you will gain understanding of all aspects of how Marketing Science contributes to Critical Mass’ client offerings. You will learn about the day-to-day activities of the marketing science program and assist in developing innovative products and deliverables. The major objective is to perfect existing skills, learn and understand new measurement methods and tools used to capture, assemble and organize data into something meaningful. 

You Will: 

  • Collaborate with other interns on a client and global intern project.  
  • Use web analytics, social, survey, and mobile measurement tools 
  • Develop tagging requirements, test and perform data quality assurance 
  • QA, identify issues, document and debug code and software issues working with Tech team 
  • Use Excel, Tableau, or DW/BI reporting system management 
  • Test software management and develop testing strategies 
  • Develop and analyze segmentation data, social media data, survey responses, market share information, web behavioral analysis 
  • Generate reporting and analysis, interpreting web analytics 
  • Use statistical analysis / data science tools like R, Python, or SPSS 
  • Analyze site traffic, search, and e-commerce analysis 
  • Have experience with A/B or multivariate testing results analysis 
  • Assist in analysis presentation development (story telling with data), internal and client team presentation of analysis 

You Have: 

  • An interest in digital marketing and how organizations use social media in their campaigns 
  • Proficiency with Excel 
  • Excellent attention to detail and naturally strong memory 
  • Experience using the scientific method
  • Active listening skills 
  • Solution-oriented thinking capabilities 
  • Good communication and writing skills 
  • Currently in 2nd or 3rd year of a 4-year degree or 1st year of a 2-year specialization program 

Critical Mass is an equal opportunity employer. 

Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.

The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.

If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx 

Key Skills
Web AnalyticsSocial MediaSurvey ToolsMobile Measurement ToolsData Quality AssuranceExcelTableauBI Reporting System ManagementTesting StrategiesSegmentation DataStatistical AnalysisRPythonSPSSA/B TestingMultivariate Testing
Categories
MarketingData & AnalyticsScience & ResearchConsultingSoftware