Critical Mass is looking for a motivated and detail-oriented Project Manager to join our team. In this role, you will lead the planning, execution, and delivery of creative marketing campaigns while partnering closely with cross-functional teams to bring high-profile work to life. You'll collaborate with Producers, Designers, Animators, Strategists, Creative Directors, and external agency partners to ensure projects move seamlessly from kickoff through final delivery.

This role is ideal for someone who thrives in a fast-paced, highly collaborative environment, enjoys managing multiple workstreams simultaneously, and takes ownership of projects from start to finish. You are adaptable, proactive, and comfortable navigating changing priorities while keeping teams aligned and projects moving forward.

This position requires full on-site attendance, five days per week, at the Barreal office (Heredia, Zona Franca Metropolitana).

• Lead the planning, execution, and delivery of creative marketing campaigns from initiation through completion.
• Manage multiple concurrent campaign workstreams, balancing priorities, timelines, resources, and deliverables across several projects simultaneously.
• Coordinate cross-functional teams including Creative Directors, Designers, Animators, Strategists, Producers, Technology, QA, Production, and Account Management.
• Partner with internal teams and external agency stakeholders to ensure projects remain aligned, on schedule, and meet client expectations.
• Facilitate project meetings, document decisions, and drive accountability for action items.
• Build and maintain detailed project schedules, timelines, budgets, and resource plans.
• Proactively identify risks, dependencies, blockers, and changing priorities, adapting plans as needed to keep projects on track.
• Track project health through timeline management, budget oversight, resource allocation, and progress reporting.
• Support project intake, scoping, estimation, and resource planning.
• Maintain organized project documentation and ensure stakeholders have visibility into project status.
• Prepare and communicate regular project updates, risks, and recommendations.
• Ensure creative deliverables are completed on time, within scope, and at the highest quality standards.
• Identify opportunities to improve workflows, collaboration, and delivery processes.
• Contribute to a positive team culture while supporting best practices across project delivery.

• 3–5+ years of project management experience delivering creative campaigns within an advertising, marketing, creative, or digital agency environment.
• Experience managing multiple concurrent creative projects in a fast-paced, client-facing environment.
• Demonstrated ability to manage complex timelines involving multiple stakeholders, workstreams, and shifting priorities.
• Experience collaborating with multidisciplinary teams including Creative, Design, Production, Strategy, QA, and Technology.
• Strong sense of ownership and accountability, with the ability to make informed decisions and confidently navigate ambiguity.
• Proven ability to adapt quickly to changing business needs and emerging project requirements.
• Excellent organizational and multitasking skills, with exceptional attention to detail.
• Experience managing project budgets, timelines, scope, risks, dependencies, and stakeholder expectations.
• Strong verbal and written communication skills, with the ability to communicate effectively across technical, creative, and business teams.
• Experience using project management tools such as Jira, Confluence, Smartsheet, Microsoft Teams, or similar platforms.
• Advanced English communication skills, both written and verbal.
• Ability to work independently while managing competing priorities and deadlines.

• Experience supporting global or enterprise-level brands within a creative agency environment.
• Familiarity with campaign production workflows for integrated marketing, digital, or creative advertising initiatives.
• Experience working with Agile, Scrum, Waterfall, or hybrid project delivery methodologies.
• Experience working with distributed global teams across multiple regions and time zones.

What we offer: 

• Maternity and parental leave extra days
• Competitive benefits packages
• Vacation, compassionate leave, sick days, and flex days
• Access to online services for families and new parents
• Diversity and Inclusion Board with 12 affinity groups
• Internal learning and development programs
• Enterprise-wide employee discounts
• And more…

At Critical Mass, we value our employees and offer competitive compensation and benefits packages.  If you’re looking for a challenging and rewarding opportunity to make a significant impact on the lives of our employees, we encourage you to apply for this exciting position today!

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 learningImprove collaboration and team relationships.Increase employee engagement

This work 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.

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#avoidIf Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.htmlIf U.K. based: https://www.gov.uk/consumer-protection-rightsIf Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx