Application Guide

How to Apply for Senior Security Engineer

at Arcadia

🏢 About Arcadia

Arcadia is at the forefront of the clean energy revolution, leveraging technology to decarbonize the grid and combat climate change. Working here means contributing to a mission-driven company that combines environmental impact with cutting-edge security challenges at scale.

About This Role

As the Senior Security Engineer, you will own and operate Arcadia's endpoint security program on CrowdStrike, lead vulnerability management end-to-end, and serve as the response lead for security incidents. This role is critical in protecting Arcadia's cloud-native infrastructure and ensuring the integrity of clean energy data.

💡 A Day in the Life

Your day might start by reviewing CrowdStrike alerts and tuning detection rules to reduce noise, then leading a vulnerability scan and prioritizing patches with engineering teams. You could also respond to a security incident, coordinating with IT and DevOps to contain and remediate, and end the day by updating runbooks and metrics dashboards.

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Interview Prep

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🎯 Who Arcadia Is Looking For

  • Has 5-8 years of hands-on security operations experience, with deep expertise in CrowdStrike EDR (not just general endpoint security) and AWS security services like IAM, CloudTrail, and GuardDuty.
  • Has led or significantly contributed to security incident response from detection through resolution, including creating runbooks and post-incident reviews.
  • Understands vulnerability management at scale, including risk-based prioritization and driving remediation with cross-functional teams.
  • Is comfortable with SOC 2 Type II or equivalent compliance frameworks and can translate requirements into operational controls.

📝 Tips for Applying to Arcadia

1

Tailor your resume to highlight specific CrowdStrike experience (e.g., detection tuning, policy management on Windows and macOS) and AWS security fundamentals.

2

In your cover letter, mention your experience leading incident response and give a concrete example of a security incident you resolved.

3

Quantify your impact: e.g., 'Reduced mean time to detect by 30%' or 'Managed vulnerability remediation for 5,000 endpoints'.

4

Research Arcadia's clean energy mission and connect your security work to their goal of decarbonizing the grid.

5

If you have experience with SOC 2 audits or compliance, explicitly mention it in your resume and cover letter.

✉️ What to Emphasize in Your Cover Letter

['Emphasize your ownership of CrowdStrike EDR and endpoint security program management.', 'Highlight your incident response leadership and a specific security incident you handled from triage to post-mortem.', 'Show your ability to partner with stakeholders to drive vulnerability remediation and improve security posture.', "Connect your security expertise to Arcadia's mission of combating climate change through clean energy."]

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🔍 Research Before Applying

To stand out, make sure you've researched:

  • → Understand Arcadia's clean energy platform: how they aggregate energy data and connect customers to renewable energy projects.
  • → Review their engineering blog or any public talks to understand their tech stack and security culture.
  • → Look up recent news about Arcadia's growth, funding, or partnerships to show you're up-to-date.
  • → Familiarize yourself with SOC 2 Type II requirements and how they apply to a SaaS company handling energy data.

💬 Prepare for These Interview Topics

Based on this role, you may be asked about:

1 Walk me through how you would tune CrowdStrike detection rules for a new threat affecting Windows and macOS endpoints.
2 Describe a time you led a security incident response. What was your role and how did you ensure containment?
3 How do you prioritize vulnerabilities across a large environment? Give an example of a risk-based prioritization framework.
4 Explain how you would secure an AWS environment using GuardDuty, CloudTrail, and IAM in the context of Arcadia's cloud infrastructure.
5 How would you measure the effectiveness of an endpoint security program? What metrics would you report to management?
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⚠️ Common Mistakes to Avoid

  • Don't focus only on general security experience; be specific about CrowdStrike and AWS security tools.
  • Avoid vague descriptions of incident response; provide concrete examples with your specific contributions.
  • Don't ignore the company's mission; failing to connect your role to clean energy can make you seem disinterested.

📅 Application Timeline

This position is open until filled. However, we recommend applying as soon as possible as roles at mission-driven organizations tend to fill quickly.

Typical hiring timeline:

1

Application Review

1-2 weeks

2

Initial Screening

Phone call or written assessment

3

Interviews

1-2 rounds, usually virtual

✓

Offer

Congratulations!

Ready to Apply?

Good luck with your application to Arcadia !

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