Senior Security Engineer - Hybrid Role, Cloud & IAM Expert

Muon Space, Inc.; San Jose (CA); Hybrid; USD 193,000 - 218,000; Full time

Benefits offered by this job

Equity compensation

Medical, dental, and vision insurance

401k retirement plan

Three weeks paid vacation

12 paid holidays

Unlimited sick time

Paid parental leave

Job summary

Muon Space, Inc. is seeking a Senior Security Engineer to join our Security Engineering & IT team in the San Jose area. The role covers endpoints, networks, cloud, and identity security, plus NIST 800-171 and ITAR/EAR compliance support.

The position is hybrid (onsite three days per week in San Jose or fully remote from an approved U.S. location). The ideal candidate brings deep security expertise, hands-on IAM, cloud, and SIEM experience, and strong collaboration with engineering teams.

Qualifications

• 5+ years of information security or security engineering experience.
• Hands-on experience with endpoint detection and response platforms (CrowdStrike, SentinelOne, or similar).
• Experience managing enterprise vulnerability scanning tools (Tenable, Qualys, Rapid7, or similar).
• Deep understanding of identity and access management principles and hands-on Okta or Azure AD administration.
• Proficiency with cloud security in AWS (IAM, VPC, Security Groups, CloudTrail, GuardDuty, Config).
• Experience with SIEM platforms (Splunk, Sentinel, Elastic, or similar) for log analysis and detection engineering.
• Familiarity with compliance frameworks such as NIST 800-171, CMMC, SOC 2, or ISO 27001.
• Excellent written and verbal communication skills - able to convey risk and technical findings to both engineers and leadership.

Responsibilities

• Design, deploy, and manage endpoint security solutions across macOS and Windows fleets.
• Own network security architecture including firewall rule management, IDS/IPS tuning, and VPN infrastructure.
• Lead vulnerability management program - run scans, prioritize findings, coordinate remediation, and track closure metrics
• Administer and harden IAM systems (Okta, AWS IAM) including SSO integrations, conditional access policies, privilege access reviews
• Develop and maintain security monitoring and alerting using SIEM platforms, building detection rules and response playbooks
• Conduct security assessments of new tools, vendors, and architectural changes before deployment
• Drive cloud security posture management across AWS environments including IAM policies, S3 bucket security, security group reviews, and CloudTrail/GuardDuty monitoring
• Support CMMC Level 2 and NIST SP 800-171 compliance - SSP narratives, evidence collection, and assessments preparation
• Develop and deliver security awareness training and phishing simulations
• Lead or support incident response activities including containment, forensic analysis, root cause, and post-incident reporting
• Maintain and improve data loss prevention (DLP) controls for CUI and sensitive data
• Contribute to security policy development and keep documentation current as the environment evolves

Skills

Security expertise

Communication skills

Tools

CrowdStrike

SentinelOne

Tenable

Qualys

Rapid7

Okta

Azure AD

Splunk

GuardDuty

CloudTrail

AWS IAM

Job description

Muon Space, Inc. is seeking a Senior Security Engineer to join our Security Engineering & IT team in the San Jose area. The role covers endpoints, networks, cloud, and identity security, plus NIST 800-171 and ITAR/EAR compliance support.

The position is hybrid (onsite three days per week in San Jose or fully remote from an approved U.S. location). The ideal candidate brings deep security expertise, hands-on IAM, cloud, and SIEM experience, and strong collaboration with engineering teams.