Demo

Client Services Intern

Critical Mass
Los Angeles, CA Intern
POSTED ON 6/3/2026
AVAILABLE BEFORE 7/2/2026
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.

As a Client Service Intern, you support the Client Services Team to expertly manage and grow client relationships. Organizing status meetings, preparing presentations, documenting meeting minutes, coordinating meetings, travel, and expenses requires you to be thorough and detail-oriented—but you’ve got that covered. You’re eager to put your outgoing personality to the test by gaining experience in effective team communication. And you’ll grow in your role with key guidance and mentorship from Account Director(s) and Exec leaders.

You Will

  • Develop trusting relationships with clients and partner agencies.
  • Represent Critical Mass’s values and mission.
  • Begin to understand and showcase Critical Mass service offerings.
  • Organize and set agendas for weekly client meetings.
  • Assume ad-hoc requests and assist in the coordination, preparation, and promotion of projects and special events.
  • Prepare appropriate presentations and present data from varying sources.
  • Liaise with Client Services and Project Management teams.
  • Schedule meetings and facilitate meeting needs with internal teams, departments, clients, and vendors.
  • Liaise and communicate on behalf of Client Services department.
  • Coordinate between agencies regarding client information and document sharing, meeting scheduling, and communication maintenance.
  • Support Marketing and Business Development department teams as required.
  • Begin to understand financial literacy per account. 
  • Further develop digital acumen and performance marketing.
  • Grow your knowledge of digital marketing and trends in the industry. 

You Have

  • Highly proficient skills in Microsoft Office Suite, PowerPoint, and Keynote.
  • Excellent word processing skills.
  • Excellent oral and written communication skills.
  • A thorough, detail-oriented mindset where organization is prioritized.
  • Ability to multi-task and meet tight deadlines.
  • Ability to work well under stress and in a dynamic environment.
  • An outgoing, self-motivated, and assertive personality.
  • Good balance between working independently and working with a team.
  • Effective interpersonal skills and the ability to be a global thinker.
  • Ability to proactively and diligently follow up with teams.
  • Good use of tact and judgment.
  • In your second or third year of university study or the first year of a two-y ear educational program.

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

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

$21—$21 USD

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

Salary : $21

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