Data Science Intern - Sunnyvale

Only for registered members Sunnyvale, United States

11 hours ago

$30,000 - $55,000 (USD) per year *

* This salary range is an estimation made by beBee

Lensa is a career site that helps job seekers find great jobs in the US. We are not a staffing firm or agency. Lensa does not hire directly for these jobs, but promotes jobs on LinkedIn on behalf of its direct clients, recruitment ad agencies, and marketing partners. · Lensa part ...

Job description

Lensa is a career site that helps job seekers find great jobs in the US. We are not a staffing firm or agency.

Lensa does not hire directly for these jobs, but promotes jobs on LinkedIn on behalf of its direct clients, recruitment ad agencies, and marketing partners.

Lensa partners with DirectEmployers to promote this job for Proofpoint. Clicking "Apply Now" or "Read more" on Lensa redirects you to the job board/employer site. Any information collected there is subject to their terms and privacy notice.

About Us

Proofpoint is a global leader in human- and agent-centric cybersecurity. We protect how people, data, and AI agents connect across email, cloud, and collaboration tools.

Over 80 of the Fortune 100, 10,000 large enterprises, and millions of smaller organizations trust Proofpoint to stop threats, prevent data loss, and build resilience across their people and AI workflows.

Our mission is simple:
safeguard the digital world and empower people to work securely and confidently. Join us in our pursuit to defend data and protect people.

How We Work

At Proofpoint you'll be part of a global team that breaks barriers to redefine cybersecurity guided by our BRAVE core values:

Bold in how we dream and innovate

Responsive to feedback, challenges and opportunities

Accountable for results and best in class outcomes

Visionary in future focused problem-solving

Exceptional in execution and impact

Data Science Intern (Summer, 10 weeks)

Join our AI team building next-gen Digital Communications Governance features, including LLM tuning, vectorization/embeddings for semantic search, automated redaction, and Supervision reviewer recommendation workflows for investigations and compliance.

What you'll do

Prototype and evaluate embedding + retrieval pipelines (chunking, indexing, reranking) for investigation-grade semantic search
Assist with LLM tuning approaches (prompting, lightweight fine-tuning, eval harnesses) for classification, summarization, and recommendation tasks
Build/extend redaction models/rules (PII/entity detection), and measure precision/recall tradeoffs
Design experiments, create metrics, and document findings; ship working code and repeatable notebooks/pipelines

Desired Skills

Strong Python and practical ML/data wrangling (pandas, numpy; PyTorch or similar)

Solid understanding of NLP/LLMs:
embeddings, retrieval-augmented generation (RAG), evaluation methods

Experience with at least one:
vector databases (FAISS, Milvus, Pinecone, Elasticsearch/OpenSearch vector), or building ANN search

Comfort with experimentation:
offline evaluation, A/B-style thinking, error analysis
Clear communication and ability to deliver in short iterations

Logistics

10-week summer internship (Location: Sunnyvale)
You'll deliver a working prototype + evaluation report by the end of the internship

Why Proofpoint?

Benefits

At Proofpoint, we believe that an exceptional career experience includes a comprehensive compensation and benefits package.

Here are just a few reasons you'll love working with us:

Competitive compensation
Comprehensive benefits
Career success on your terms
Flexible work environment
Annual wellness and community outreach days
Always on recognition for your contributions
Global collaboration and networking opportunities

Our Culture

Our culture is rooted in values that inspire belonging, empower purpose and drive success-every day, for everyone.

We encourage applications from individuals of all backgrounds, experiences, and perspectives. If you need accommodation during the application or interview process, please reach out to .

How To Apply

Interested? Submit your application along with any supporting information- we can't wait to hear from you

Proofpoint has been honored with six Best Places to Work Awards in 2024 by workplace culture leader Comparably, including Best Company Career Growth, Best Company Outlook, Best Global Culture, Best Engineering Teams, Best Sales Teams, and Best HR Teams.

We are the leader in human-centric cybersecurity. Half a million customers, including 87 of the Fortune 100, rely on Proofpoint to protect their organizations. We're driven by a mission to stay ahead of bad actors and safeguard the digital world. Join us in our pursuit to defend data and protect people.

Our BRAVE Values

At Proofpoint, we are BRAVE in everything we do, and our values aren't just words—they shape how we work, collaborate, and grow.

We seek people who are bold enough to challenge the status quo, responsive in the face of ever-evolving threats, and accountable for delivering real impact.

We value those with a visionary mindset who anticipate what's next and push cybersecurity forward, and we celebrate exceptional execution that ensures we continue to defend data and protect people.

Proofpoint is an equal opportunity employer, we hire without consideration to race, religion, creed, color, national origin, age, gender, sexual orientation, marital status, veteran status or disability.

Find your network, your allies, and your biggest fans.

We know that work is simply better when you're surrounded by people who inspire you—who share ideas, cheer you on, and genuinely want to see you succeed.

That's why we offer social circles, sponsored networks, and connection points across teams and time zones—to help you find your people, build your community, and thrive together.

This isn't just a job—it's a mission to protect people and defend data in a world that never slows down.

We're building the future of human-centric cybersecurity, and that future belongs to all of us. We take ownership, move fast, and hold ourselves accountable—because that's what it takes to stay ahead. And we do it together, winning as one.

Be empowered to reach your full potential through meaningful challenges and personalized support—designed around you and your goals.

Whether you're growing as a leader or leveling up from great to exceptional as an individual contributor, we're here to help you get there.

If you have questions about this posting, please contact

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