161 Advertising Assistant Jobs in California

Updated daily. Most recent posting: November 13, 2026.

Marketing Assistant

The Marketing Assistant supports face-to-face promotional campaigns by representing client brands, demonstrating products, and engaging potential customers. The role also gathers customer feedback and works toward marketing and sales objectives....

Los Angeles, California Zolidco
Public Relations & Communications Assistant - Entry Level

This entry-level role represents nonprofit organizations in community outreach and communicates their missions to the public. It also supports promotional campaigns and public engagement events while providing communications and marketing training....

Hayward, California Tri-Valley Collective
Advertising Sales Assistant On-Site Proposals

Impact Marketing Modesto is seeking an Advertising Sales Assistant to support the sales team with proposals, presentations, and sales materials for campaigns. This on-site role in Modesto collaborates with clients and internal teams to organize schedules and ensure documentation of sales activities ...

Modesto, California Impact Marketing Modesto
Digital Marketing & Social Media Assistant

About US: Tryfacta is a leading, nationally renowned Workforce Management Solution provider for private &public sector firms across the US. We specialize in Healthcare, IT, Business Support, and Professional & Craft/Light Industrial ecosystems. Tryfacta is certified by the Joint Commission for Healt...

Stockton, California Tryfacta, Inc
Advertising Specialist

Working with us means you’ll be part of a diverse and dedicated group of people who make a real difference for our clients and communities every day. Excellent project management skills and ability to work cross-functionally in a fast-paced environmentStrong Microsoft Office skills with the ability ...

Ontario, California Fidelity International
Marketing & Campaign Assistant (Entry Level)

The entry-level assistant supports experiential marketing campaigns for nonprofit partners by helping run live promotions, representing partner missions, and coordinating event logistics. The role also contributes ideas and scripts in daily strategy meetings and offers training with a path toward ma...

Oakland, California Tri-Valley Collective
Account Coordinator - Honda

Supports an advertising agency’s account management team on Honda launch, regional dealer, and sponsorship campaigns. Responsibilities include coordinating meetings and campaign materials, tracking schedules and budgets, assisting with briefs and production, and supporting integrated campaigns acros...

Santa Monica, California RPA
Marketing Communications Specialist, Associate - Strategic Planning & Integration

Supports Qualcomm’s marketing strategic-planning team by maintaining planning materials, coordinating forums, and tracking inputs, deadlines, and follow-up actions. The role also helps prepare planning communications and summaries and organize market and competitive information....

San Diego, California qualcomm
Assistant Account Executive, Influencer & Celebrity Relations

Supports influencer and celebrity relations strategies for beauty and wellness clients, including talent outreach, gifting, social campaign logistics, events and press releases. Tracks social metrics and contributes to client reports and creative activation ideas....

Los Angeles, California BPCM
Talent Assistant

Supports a talent publicist at a communications firm with administrative tasks, client requests, press materials, and coordination for photo shoots, press junkets, and premieres. The role also provides client coverage and requires strong writing, organization, and communications skills....

BEVERLY HILLS, California The Lede Company
Programmatic AdOps Intern (Unpaid)

ODK Media is seeking a Programmatic AdOps Intern to assist with the technical management and delivery of digital advertising campaigns across web and streaming platforms. The role involves troubleshooting ad delivery, analyzing performance data, and collaborating with the operations team to optimize...

Irvine, California ODK Media
Marketing Assistant - Housing & Construction Marketing

Our Marketing Assistants support the Clever Punch team by executing various marketing tasks for clients, including copywriting, social media scheduling, graphic design, and Squarespace website updates. Clever Punch's Marketing Assistants support our team of Account Managers by creating content for o...

Santa Barbara, California Clever Punch Co.
Marketing & Communications Office Coordinator

Salinas Valley Health's Marketing & Communications Department seeks a Department Assistant to provide complex secretarial support to the Department Director. The role handles information requests, scheduling, and filing while performing other duties as assigned. Primary duties include answering phon...

Salinas, California salinasvalleyhealth
Admin Assistant, Creative Advertising - Focus Features

Admin Assistant, Creative Advertising - Focus FeaturesFull-timeBusiness Segment: Universal FilmCompensation: USD 47500 - USD 60000 - yearlyNBCUniversal is one of the world's leading media and entertainment companies. We own and operate leading entertainment and news brands, including NBC, NBC News, ...

Fresno, California NBCUniversal
HMI Marketing Communication Internship

The intern will help build ASML HMI’s marketing communications function by creating product collateral, digital content, customer stories, and internal and external communications. The role also supports brand consistency and collaborates with product, sales, and corporate communications teams....

San Jose, California ASML
The Signal Social Media & Marketing Producer (Student Assistant)

The student assistant will develop and implement social media engagement strategies, create weekly content, and monitor performance to grow followers and website traffic. The role also coordinates with the website and analytics manager and supports social media work by student reporters and staff....

Turlock, California California State University
Marketing Intern

The Marketing Intern will support social media community management, influencer and UGC outreach, and digital marketing campaigns. The role also involves market research, basic reporting, cross-functional projects, and administrative support for the marketing team....

Remote (San Diego, California) Establishment Labs
Sales Assistant

Supports Hearst Magazines’ advertising sales team across print, digital, and social accounts. Responsibilities include responding to client requests, preparing advertising proposals and market reports, processing insertion orders, and coordinating sales documentation and administrative needs....

Santa Monica, California Hearst Communications
Social Media Management Internship

The intern will learn and support social media management under the organization’s marketing team, including content creation, channel management, advertising, and analytics. The 10-week program also offers opportunities to develop skills in areas such as influencer marketing, reputation management,...

Rancho Cucamonga, California National CORE
Assistant Marketing Campaigns & Events Strategist

SI Marketing in Sacramento is seeking an Assistant Marketing Manager to support planning, execution, and optimization of marketing campaigns, brand initiatives, and live events. You will blend strategic marketing with hands-on campaign delivery to boost brand awareness and customer engagement across...

Sacramento, California SI Marketing
Job Types
Full-Time (46163) Part-Time (2671) Internship (2253) Freelance (1416)
Experience Level
Entry Level (9037) Senior (14079)
Fields
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Occupations
Marketing (161214) Manager (103701) Other (65951) Sales (62763) Director (37259) Coordinator (28224) Production (24506) Public Relations (19856) Designer (10649) Buyer (9571) Expand for more
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