At Critical Mass, we’re more than a digital marketing agency—we’re a creative force that thrives on collaboration, innovation, and the power of people. We're hiring a visionary Human Resources Director to join our dynamic team, serving as a strategic partner for our New York office and as HR lead for one of our high-profile client groups nationwide. Here, you’ll shape the employee experience, champion our culture, and directly impact the careers of our talented team.

You Will

Command the development, implementation, and continuous improvement of HR strategies and programs that drive engagement, performance, and retention across the organization
Build trusted relationships with senior leadership, serving as an influential advisor and strategic partner for all things talent and culture
Own the full employee lifecycle for employees across multiple locations
Take the lead on change management and special projects within the HR and talent teams, bringing creative solutions and thought leadership to agencywide initiatives
Mentor and develop HR team members, fostering growth, collaboration, and operational excellence
Navigate complex employee relations and conflict resolution with empathy and courage, ensuring a positive and compliant workplace
Analyze HR data, provide actionable insights, and deliver regular reporting to executive leadership
Drive diversity, equity, and inclusion efforts, ensuring our practices foster belonging and opportunity for all
Ensure audit ready compliance with employment laws, regulations, and internal policies, mitigating risk and modeling best practices

You Have

5–8 years of progressive HR experience, ideally at the Director level and preferably within a fast-paced agency or similar environment
A big-picture mindset, with a knack for translating organizational vision into actionable HR strategies
The ability to lead with empathy, deliver tough messages with care, and thrive in the “gray” areas of people leadership
Masterful prioritization skills: you can pivot quickly and stay ahead in a dynamic environment
Expertise in HR analytics, using data to drive decisions and tell compelling stories
A strong belief in the power of teams—both within HR and across the agency
Proficiency with Microsoft Office, and experience with HRIS and presentation tools
Comfort and enthusiasm for working three days a week in the New York office to model, connect, and inspire

What We Offer

Global maternity and parental leave
Competitive benefits packages
Access to online services for families and new parents
Extensive winter holiday office closures
Diversity and Inclusion Board with 12 affinity groups
Internal learning and development programs
Enterprise-wide employee discounts

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.

We continually review ranges to address skills, experience and markets. Base salaries are determined during our interview process, by assessing a number of factors that include, but aren’t limited to, a candidate’s experience and skills relative to the scope and responsibilities of the position. For current CM employees, tenure will also be a consideration.

Salary Range

$145,000—$165,000 USD

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, 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

Critical Mass

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Human Resources Director