Vice President, Data Science

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide. Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together.

We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves. As Vice President of Data Science, you will lead and grow our in-house data science team. This team is responsible for research, experimentation, data collection and curation, and data analysis that contributes to the performance of Five9’s AI products.

Tasks include evaluation of and selection of AI agent architectural frameworks, evaluation and comparison of LLM models across commercial and open source choices, model fine-tuning for dedicated tasks, prompt engineering, prompt structure and design, and composite model definitions and evaluations. The scale of Five9 provides a wealth of data that data science team has access to. The data science team is very much applied – their work directly makes its way into real products providing direct customer benefit.

As lead of this team, you will take complete ownership of the technical and operational direction of the organization, including growing to team to meet increased demand for its capabilities.

Key Responsibilities

: Technical Direction Setting: As an expert in the leading edge of AI and data science, you will direct the team on the methodologies, practices, algorithms, experiments and processes they perfo rm. Hands On: You are expected to also be hands on, not just a manger, and be directly responsible for some amount of the technical work in addition to directing the team. Organizational Growth: You will be tasked with growing the team, and ensuring we have the right talent to accomplish our goals.

Collaborator and Spokesperson: You will act as an internal and external spokesperson for data science, and collaborate with stakeholders across the company. Internally, you will be expected to meet with product managers, executives and estaff, and be able to converse effectively with them. You will also occasionally meet with customers to understand how Five9 products, and the data science behind them, impacts the customers.

You are expected to participate in industry activities, including publication of blog posts and papers, along with participation in AI conferences. Technical Expertise: 12+ years experience in data science or AI applied research, ideally at a best-in-class applied research organization. Deep Expertise in Modern AI/ML Extensive hands-on experience with LLMs, agentic architectures, retrieval-augmented systems, transformers, and composite model pipelines.

, OpenAI, Anthropic, Google, Meta, Mistral), including evaluation, benchmarking, and tradeoff analysis. Model Development Optimization Proven ability to perform fine-tuning, supervised/unsupervised training, prompt engineering, prompt optimization, and model orchestration for real-world use cases. Experience designing evaluation frameworks, experiment methodologies, and robust model comparison workflows.

Data Engineering Curation Expertise in large-scale data collection, labeling, cleaning, and curation pipelines, preferably with conversational or unstructured text data. Familiarity with tools and techniques for data quality assessment, dataset versioning, and data governance. Applied Data Science Analytics Strong proficiency in statistical analysis, A/B experimentation, causal inference, and performance measurement.

Demonstrated success turning data insights into product improvements that drive measurable business outcomes. Software Development Systems Thinking Ability to work with engineering teams using modern software practices (Python, data platforms, cloud-native environments, APIs, ML Ops tooling).