Freelance Senior Copywriter

10 Minutes ago • 4-7 Years • $114,400 PA - $124,800 PA

Job Summary

Job Description

As a Senior Copywriter, you will be a passionate and skilled writer, joining a highly collaborative team in a dynamic, fast-paced environment. You will be responsible for creating messaging that drives awareness, preference, and sales for the client’s flagship brand. Key areas include developing communication guides, crafting differentiated messaging, overseeing naming, establishing claim development processes, proofing content, and ensuring legal compliance. You will collaborate with various internal departments to create impactful, SEO-centered copy.
Must have:
  • BA in English, Journalism, Communications, or Advertising
  • 4-7 years of experience in content marketing or copywriting
  • Excellent writing, editing, and proofreading skills
  • Strong research, listening, and creative thinking skills
  • Ability to think conceptually and translate ideas into compelling messaging
  • Proven ability to demonstrate brand voice
  • An excellent portfolio of work
  • Proficiency in Microsoft Office
  • Solid understanding of SEO and digital marketing best practices
  • Experience with product content management systems and emerging technologies like Copilot
  • Ability to obtain a Level 2 Security Clearance (U.S. citizen or permanent resident)

Job Details

As a Senior Copywriter, you’re a passionate writer, skilled at copywriting and creative communications. You're looking to join a highly collaborative team in a dynamic, fast-paced environment. You are creative, highly organized, and able to work efficiently on multiple projects to meet tight deadlines. You enjoy building relationships and collaborating with external partners and colleagues throughout the company. You value input from a variety of sources, anticipate problems, and accept feedback well. You are comfortable voicing your opinion—even when it goes against the group. Flexible and able to prioritize competing projects, you thrive on translating complexity into straightforward copy.

At Critical Mass, you will work closely with stakeholder teams to understand their needs for messaging that drives awareness, preference, and sales for products for the client’s flagship brand. While project priorities will shift in response to evolving business needs, the following key areas represent our current strategic focus:

  • Communication Guides: Create comprehensive guides to ensure consistent and effective communication across all channels.
  • Differentiated Messaging: Craft unique and compelling messages that highlight the distinct advantages of our products.
  • Naming: Oversee the development of new product names and ensure the protection and maintenance of trademarks on existing names.
  • Claim Development Process: Establish and maintain a process for developing and validating product claims.
  • Proofing: Review and proofread all content to ensure accuracy and consistency.
  • Legal Compliance: Coordinate with legal teams to ensure all content is compliant with relevant regulations and obtain necessary approvals before publication.

You Will:

  • Collaborate with channel marketing, product management, and other internal departments to identify needs, requirements, and goals for creating relevant and impactful copy and messaging.
  • Work with brand and channel teams in accordance with strategy, customer guidelines, and decision maker behaviors to develop innovative and effective written communications.
  • Work independently within tight, and often changing, timelines while managing competing priorities.
  • Support a market-driven and industry-leading brand strategy.
  • Self-manage project priorities, timelines, and resources to ensure projects are delivered on time and within budget.
  • Edit and proof work to ensure high editorial standards are met across all content outputs.
  • Develop copy and messaging in alignment with brand standards and goals with an SEO-centered approach for a variety of media and applications.
  • Cultivate a deep understanding of our products, innovations, customers, and target decision makers.
  • Develop compelling copy to drive engagement with different consumer and professional decision makers through various content types.
  • Be the voice of the brand that reflects our positioning, value proposition, and persona.
  • Build marketing communications that meet customer requirements and brand guidelines, optimize key opportunities, and advocate for our brand with impactful, SEO-optimized content that drives engagement.

You Have:

  • BA in English, Journalism, Communications, or Advertising
  • 4-7 years of experience in content marketing or copywriting
  • Excellent writing, editing, and proofreading skills with a diligent eye for brand voice, accurate detail, language, flow, and grammar
  • Strong research, listening, and creative thinking skills
  • Ability to think conceptually and translate ideas into compelling, audience-specific messaging
  • Proven ability to demonstrate brand voice
  • An excellent portfolio of work
  • Proficiency in Microsoft Office
  • Solid understanding of SEO and digital marketing best practices is required to optimize content performance.
  • Experience working with various product content management systems and emerging technologies, including Copilot

Please note that occasional travel may be required.

This position requires candidates to obtain a Level 2 Security Clearance in accordance with U.S. government regulations. As such, only U.S. citizens or permanent residents (Green Card holders) are eligible to apply.

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

$55 - $60 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/educacionconsumidor/consejospracticos.aspx

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About The Company

Critical Mass is a team of 1,800 inspired folks based in 12 offices around the world, providing full-service digital capabilities for the greatest brands on Earth. Our secret sauce is our uncompromising design standards, our relentless focus on customers, and an ability to put powerful new technologies to work for our clients.


We work with the best—Apple, Nike, Mars Wrigley, Nissan, Diageo, Airbnb, BMW, BNY Mellon, Johnson & Johnson, and many more—brands who strive for connected digital ecosystems and unparalleled experiences. We help them get there by gaining deep insight into their consumers and orchestrating data, AI, design, media, and tech stacks around human stories.


We’re a global agency founded in Canada, but digital is our home. If you know us, then you know we’re a special, quirky place that attracts big talent and tiny egos. (We actually give out a “so f-n nice” award—lots of them). But just because we’re friendly doesn’t mean we’re not a force to be reckoned with. We’re driven. Relentless. And we live our values. We’re Critical Mass, but our friends call us CM. Please call us CM!

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