Media.

Senior Media Planner

in Toronto.

Join our dynamic Digital Inventory team and play a pivotal role in building CM’s cutting-edge programmatic integrations with top publishers across display, video, and audio. This is a unique opportunity to be at the forefront of programmatic innovation, where you'll work with leading digital platforms and develop impactful relationships with key industry players. 

Please note that this is a Project Employee role from 5/5/2025 thru 7/1/2025 
with the possibility of extension.

Apply.

You Will:

  • Lead the implementation of programmatic integrations with major digital publishers, including display, mobile, and video advertising.
  • Build and nurture strong publisher relationships through effective collaboration with operational teams at digital media companies.
  • Troubleshoot Deal IDs and support Trading teams across SSP/DSP/Publisher environments to ensure seamless execution.
  • Maintain and update Publisher URL lists for PMP Deals, ensuring all data is current and accurate.
  • Regularly update inventory status documents, providing transparency and tracking progress across your responsibilities.
  • Conduct deep-dive publisher network analytics to assess inventory quality, volume, and performance.

You Have:

  • Hands-on digital experience within DSP/SSP/Publisher environments and a solid understanding of programmatic activation, particularly DV360 and The Trade Desk.
  • Familiarity with supply-side digital media platforms such as Google Ad Manager/Adx, IndexExchange, Magnite, etc.
  • Strong background in digital media operations, especially within ad operations roles at digital media publishers or ad networks.
  • Exceptional attention to detail, with a commitment to delivering high-quality results and meeting deadlines.
  • Excellent organizational, communication, and people skills, with the ability to collaborate effectively across teams.
  • A proactive, results-driven mindset and an eagerness to learn and grow within the programmatic media space.

 

What We Offer

  • Global maternity and parental leave
  • Competitive benefits packages
  • Vacation, compassionate leave, wellness days, and flex days
  • Six free therapy sessions through Therify 
  • Access to online services for families and new parents 
  • Hybrid work options
  • Summer Fridays (off at 3:00 PM local time every Friday)
  • Diversity and Inclusion Board with 13 affinity groups
  • Funding towards internal learning and development 
  • Enterprise-wide employee discounts

 

The Talent Team at Critical Mass is focused on ensuring we provide the best training, onboarding, and employee experience possible! 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. The ask stems from our want to:


Strengthen opportunity for continuous learning.
Improve collaboration and team relationships.
Increase employee engagement.


This hybrid model balances the need for individual flexibility while maintaining the relentless customer focus we provide at CM. We understand that not everyone may feel comfortable with this expectation, so we ask that you please let us know immediately if there are any concerns so we can help navigate accordingly.

CM Liquid Talent is still an option for roles approved to be 100% remote.

Critical Mass is an equal opportunity employer that is committed to diversity and inclusion in the workplace. We do not tolerate discrimination on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status. If you are an individual with disabilities who would like to request an accommodation, please reach out to accommodations@criticalmass.com.

We are committed to fostering diversity, equity, and inclusion within our candidate pools. 

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 

Apply.