Media Supervisor

As a Media Supervisor, you are a hands-on digital media expert with a passion for video investment and campaign execution. You thrive in the details—developing, implementing, and optimizing high-performing media plans across a variety of video channels. You bring deep knowledge of the evolving video landscape, stewarding media buys and ensuring campaigns deliver against client goals. You’re a supportive team leader, guiding associates while managing up to senior leadership, and playing a critical role in fostering a collaborative and high-performing media team.

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 3 days a week.

You Will:

• Oversee the execution and management of digital and video media campaigns across platforms including CTV, programmatic, and video.


• Collaborate with internal planning, strategy, and insights teams to translate client goals into actionable media investment plans.


• Manage campaign implementation end-to-end, from buy development and trafficking through to reporting and optimization.


• Analyze campaign performance and provide clear, actionable insights and optimization recommendations.


• Develop and maintain strong relationships with media partners, pushing for innovation and added value.


• Supervise and mentor Associates and Senior Associates, ensuring team output is accurate, timely, and strategically sound.


• Stay current on media trends, particularly within the video landscape, and proactively identify new opportunities for clients.


• Support in the preparation of client deliverables including reporting decks, media recommendations, and POVs.

You Have:

• 4–6 years of experience in digital media planning and investment, with a strong emphasis on video platforms.


• Hands-on experience in campaign execution across CTV, digital video, and programmatic.


• Strong knowledge of media buying processes and performance metrics.


• Previous experience managing or mentoring junior team members.


• Ability to analyze performance data and develop clear, compelling narratives from insights.


• Excellent organizational, communication, and time management skills.

What We Offer:

• Global maternity and parental leave 


• Competitive benefits packages 


• Vacation, compassionate leave, wellness days, and flex days 


• Access to online services for families and new parents


• Early Dismissal Friday’s (off at 3:00 PM local time every Friday) 


• Diversity and Inclusion Board with 13 affinity groups 


• Internal learning and development programs 


• Enterprise-wide employee discounts

Critical Mass is an equal opportunity employer. 

The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.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