Lead experiential marketing programs end-to-end as the primary client contact: manage timelines, budgets, cross-functional teams, and strategy; mentor junior staff, support proposals and new business, and ensure operational excellence and measurable impact.
Who We Are
At Mosaic, we believe humanity is the starting point to every solution.
In a world where technology is moving faster than ever, people are looking for authentic connections they can trust. That's where we come in. We create human-centered experiences that bring brands and consumers together in meaningful ways, transforming audiences into advocates and moments into measurable business results.
We're an outcomes-obsessed experiential agency that helps brands build stronger connections with customers, communities, partners, and employees. From large-scale consumer activations and retail experiences to executive events, conferences, sponsorships, sampling programs, and B2B engagements, experiential marketing is at the core of what we do.
We're looking for a Senior Account Manager who thrives in a fast-paced environment, loves building client relationships, and knows how to turn great ideas into flawlessly executed programs.
The Senior Account Manager is a strategic leader, trusted advisor, problem solver, and client champion.
You'll be responsible for leading a portfolio of experiential marketing programs from brief through execution, managing client relationships, guiding internal teams, overseeing budgets, and ensuring every deliverable meets Mosaic's standards for creativity, operational excellence, and measurable impact.
Success in this role comes from balancing strategic thinking with hands-on execution while maintaining strong relationships internally and externally.
ResponsibilitiesWhat You'll Do
Client Leadership & Partnership
- Serve as the primary day-to-day client contact and trusted advisor across assigned accounts.
- Build strong, long-term partnerships by understanding client business objectives, industry trends, and marketing priorities.
- Anticipate client needs before they arise and proactively recommend solutions and opportunities.
- Lead client meetings, presentations, status updates, and program reviews with confidence and professionalism.
- Help clients navigate challenges while maintaining positive, productive relationships.
Account & Program Management
- Lead the planning and execution of experiential programs from kickoff through final reporting.
- Manage multiple projects simultaneously, ensuring work is delivered on time, on budget, and on strategy.
- Develop program timelines, workbacks, scopes of work, status documents, and project plans.
- Coordinate seamlessly with creative, strategy, operations, production, staffing, analytics, and finance teams.
- Identify risks early and develop solutions before they become problems.
Strategic Thinking
- Translate client business goals into actionable experiential marketing strategies.
- Contribute to program ideation and development with insights grounded in consumer behavior and business objectives.
- Help shape integrated programs that connect experiential efforts with broader marketing initiatives.
Financial Management
- Own program budgets, forecasting, reconciliations, and profitability.
- Develop estimates, scopes, and client proposals.
- Monitor project financial health and identify opportunities for efficiency and growth.
- Partner with leadership to support revenue growth within assigned accounts.
Team Leadership
- Mentor, coach, and support junior team members, helping them grow both professionally and personally.
- Foster collaboration across departments and create an environment where great work can thrive.
- Lead by example through accountability, positivity, and a solutions-oriented mindset.
- Support talent development and contribute to Mosaic's culture of continuous learning and improvement.
New Business & Growth
- Identify opportunities to expand client relationships and introduce additional agency capabilities.
- Support proposal development, pitches, and business development initiatives as needed.
- Actively contribute ideas that help grow both client partnerships and agency success.
What You're Great At
- Building trust with clients and becoming their go-to partner.
- Managing multiple priorities without sacrificing quality.
- Communicating clearly and confidently with every audience, from executives to event staff.
- Keeping complex projects organized and moving forward.
- Navigating ambiguity and finding solutions when challenges arise.
- Balancing strategic thinking with executional excellence.
- Maintaining composure and positivity in fast-moving environments.
Bringing people together and motivating teams to do their best work.
What You Bring
- 7+ years of experience in experiential marketing, event marketing, integrated marketing, agency account management, or related fields.
- Previous agency experience managing cross-functional teams and client relationships.
- Proven success leading B2B and/or B2C experiential programs.
- Strong budget management, forecasting, and proposal development experience.
- Exceptional verbal, written, and presentation skills.
- Excellent organizational, project management, and prioritization abilities.
- Strategic thinking combined with strong attention to detail.
- Confidence making decisions and taking ownership of outcomes.
Typically, a mosaic is where all the pieces fit together nicely. That’s not us. This Mosaic is where every piece stands out. That’s because each person at our agency brings their own, unique set of skills to every brief, build, interaction, reaction, design and idea.
As part of the Acosta Group, Mosaic is one of the original marketing agencies who specialize in interactions, experience isn’t just what we have, it's what we create. With 3,000+ team members and hubs in Toronto and Dallas, we’ve spent over 35 years bringing brands to life through experiential marketing, integrated commerce campaigns, and field sales strategies that drive real behavior change.
From awareness, to earned, brand equity, consideration, and sales — we approach every project with people in mind, regardless of the channel or discipline. The result is an idea that can spark emotion and create action — whether it’s a sale or a smile. We celebrate bold thinking and embrace curiosity as we shape what’s next.
Acosta Group is an equal opportunity employer and will ensure that applicants with disabilities are provided with reasonable accommodations. If reasonable accommodation is needed, please contact [email protected]. Be sure to include "Applicant Accommodation" in the subject of your email to expedite the request.
Acosta Group believes in good faith that the minimum and maximum annual salary or hourly compensation range for this opportunity is accurate and reasonable at the time of posting.
The Acosta Group utilizes E-Verify for validating the ability to work in the United States for all job candidates. If you want more information on what this entails and your rights as a job applicant, please use the link provided to access information on our use of E-Verify and your right to work. Employer Resources (e-verify.gov)
By applying, you agree to our Privacy Policy and Terms and Conditions of Use.
#DiscoverYourPath
Similar Jobs
AdTech • Agency • Artificial Intelligence • Digital Media • Marketing Tech • Social Media • PropTech
Manage strategically complex client relationships and portfolios, owning retention, expansion, and cross-channel digital marketing strategy. Lead quarterly business presentations, deliver data-backed recommendations, coordinate internal teams, and act as a Fiona platform expert. Drive departmental initiatives, process improvements, product feedback, client onboarding, and mentorship for Account Managers and Coordinators. Success is measured through retention, client satisfaction, response times, reporting accuracy, expansion, revenue growth, and team development.
Top Skills:
AIDisplay AdvertisingEmail MarketingFionaGeofencingNative AdvertisingOrganic SocialPaid SearchPaid SocialReputation ManagementSeo
Cloud • Computer Vision • Information Technology • Sales • Security • Cybersecurity
Provides proactive technical account management for strategic cybersecurity customers. Responsibilities include customer onboarding, platform training, health checks, issue resolution, escalation management, success planning, knowledge-base development, renewal-risk mitigation, and expansion support. The role serves as a customer advocate while collaborating with support, engineering, and sales teams. Candidates need cloud, application infrastructure, security, incident response, forensics, networking, and cloud architecture expertise, along with strong communication and customer-success skills.
Top Skills:
Ai TechnologiesCloud ArchitectureCloud InfrastructureCloud-Native ServicesComputer ForensicsCrowdstrike Falcon PlatformEnterprise Application TechnologiesNetwork AdministrationSaaSWorkload Security
Fintech • Machine Learning • Payments • Software • Financial Services
Leads regional technical payment-acceptance operations across Latin America, the Caribbean, and Mexico. Manages a distributed team, translates global strategy into market plans, diagnoses and remediates acceptance failures, and coordinates cross-functional initiatives with payment ecosystem partners. Establishes monitoring, KPIs, controls, playbooks, and governance while influencing senior stakeholders and developing team capability. Requires fluent Spanish and English, extensive payment operations experience, and approximately 15% travel.
Top Skills:
Acquiring SystemsAtm SystemsEcommerce Payment SystemsKpi ReportingPayment GatewaysPayment NetworksPayment Orchestration PlatformsPayment ProcessorsPayment Service Providers (Psps)Pos SystemsRoot-Cause AnalysisTransaction Monitoring
What you need to know about the Boston Tech Scene
Boston is a powerhouse for technology innovation thanks to world-class research universities like MIT and Harvard and a robust pipeline of venture capital investment. Host to the first telephone call and one of the first general-purpose computers ever put into use, Boston is now a hub for biotechnology, robotics and artificial intelligence — though it’s also home to several B2B software giants. So it’s no surprise that the city consistently ranks among the greatest startup ecosystems in the world.
Key Facts About Boston Tech
- Number of Tech Workers: 269,000; 9.4% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Thermo Fisher Scientific, Toast, Klaviyo, HubSpot, DraftKings
- Key Industries: Artificial intelligence, biotechnology, robotics, software, aerospace
- Funding Landscape: $15.7 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Summit Partners, Volition Capital, Bain Capital Ventures, MassVentures, Highland Capital Partners
- Research Centers and Universities: MIT, Harvard University, Boston College, Tufts University, Boston University, Northeastern University, Smithsonian Astrophysical Observatory, National Bureau of Economic Research, Broad Institute, Lowell Center for Space Science & Technology, National Emerging Infectious Diseases Laboratories
