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Cybersecurity AI Intern (6 month co-op)

Proofpoint

Cybersecurity AI Intern (6 month co-op)

Proofpoint

Cork, Ireland

·

On-site

·

Internship

·

5d ago

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

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

What you’ll do

  • Apply LLMs and agentic tooling to email security problems (e.g., phishing analysis, intent extraction, triage workflows)

  • Build small prototypes and automation (including browser-based/agent workflows where helpful)

  • Help create and evaluate datasets (including synthetic security datasets)

  • Document findings and turn them into practical recommendations

What you’ll need to succeed

  • Background in cybersecurity (coursework or projects; familiarity with phishing/social engineering is a plus)

  • Comfortable scripting in Python (or willing to ramp quickly); basic Git

  • Interest in modern AI tools (LLMs, multimodal, prompt/eval workflows) and an experimental mindset

  • Collaborative mindset - communicates clearly, seeks feedback early, and shares learnings with the team

Nice to have

  • Any exposure to email security, threat intel, or SOC workflows

  • Familiarity with basic data handling (CSV/JSON/logs) and simple evaluation metrics

Why Proofpoint?

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 accessibility@proofpoint.com.

How to Apply

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

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About Proofpoint

Proofpoint

Proofpoint provides cloud-based email security, e-discovery, and compliance solutions for companies to protect sensitive business data.

1,001-5,000

Employees

Sunnyvale

Headquarters

Reviews

4.1

1 reviews

Work Life Balance

3.5

Compensation

2.0

Culture

3.0

Career

3.5

Management

3.0

55%

Recommend to a Friend

Pros

Opportunity to work on security product

Experience with full stack development

Convenient location/close to home

Cons

Below market compensation

Limited backend/general CS exposure

Salary not competitive with other offers

Salary Ranges

509 data points

Mid/L4

Senior/L5

Mid/L4 · Information Security Analyst

2 reports

$182,114

total / year

Base

$140,088

Stock

-

Bonus

-

$180,898

$183,331

Interview Experience

2 interviews

Difficulty

3.0

/ 5

Duration

14-28 weeks

Offer Rate

100%

Experience

Positive 50%

Neutral 50%

Negative 0%

Interview Process

1

Application Review

2

Recruiter Phone Screen

3

Technical Phone Screen

4

Onsite/Virtual Interviews

5

Offer

Common Questions

Coding/Algorithm

Technical Knowledge

Behavioral/STAR

System Design

Culture Fit