--- title: 'Senior Security Engineer at Muon Space' canonical: 'https://feeny.ai/job/senior-security-engineer-muon-space-san-jose-e3tg6rdrwp3n' type: 'job' last_seen: '2026-09-04' --- # Senior Security Engineer at Muon Space - **Company:** Muon Space - **Location:** San Jose, CA - **Posted:** 2026-07-31 - **Last confirmed live:** 2026-09-04 - **Apply:** https://job-boards.greenhouse.io/muonspace/jobs/5200980007 ## Job description ## About the Role Muon seeks a Senior Security Engineer to join our Security Engineering & IT team. The ideal candidate brings deep expertise across multiple security domains and can operate independently to protect Muon’s infrastructure, data, and people. You will own and advance our security posture across endpoints, networks, cloud environments, and identity systems while contributing to compliance efforts including NIST 800-171 and ITAR/EAR requirements. This position is hybrid and requires working on-site in our San Jose, CA office three days per week or fully remote from an approved U.S. location. ## Responsibilities - Design, deploy, and manage endpoint security solutions (EDR/XDR) across macOS and Windows fleets, including policy tuning, alert triage, and incident response - Own network security architecture including firewall rule management, IDS/IPS tuning, network segmentation, and VPN infrastructure - Lead vulnerability management program — run scans, prioritize findings, coordinate remediation with engineering teams, and track closure metrics - Administer and harden IAM systems (Okta, AWS IAM) including SSO integrations, conditional access policies, privilege access reviews, and lifecycle automation - 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 — maintain SSP control narratives, collect evidence, and prepare for assessments - Develop and deliver security awareness training and phishing simulation campaigns - Lead or support incident response activities including containment, forensic analysis, root cause determination, 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 ## Qualifications - 5+ years of experience in information security or security engineering roles - Strong hands-on experience with endpoint detection and response platforms (CrowdStrike, SentinelOne, or similar) - Demonstrated 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 - Solid networking knowledge — firewalls, proxies, DNS security, network segmentation, packet analysis - 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 Nice-to-Have Skills - Relevant certifications (CISSP, GIAC, CEH, AWS Security Specialty, or similar) - Experience with infrastructure-as-code security (Terraform, CloudFormation) and CI/CD pipeline security - Background in environments subject to ITAR/EAR export control requirements Salary The salary range for this role is $184,000 - $208,000, plus a competitive equity grant and comprehensive benefits package. Final compensation will be determined based on skills, qualifications, experience, and geographic location as assessed during the interview process. ## About Muon Space Founded in 2021, Muon Space is an end-to-end Space Systems Provider that designs, builds, and operates LEO satellite constellations delivering mission-critical data. Our revolutionary, integrated technology stack enables customers to optimize every dimension of their missions for faster time-to-orbit and superior constellation remote sensing performance. Our state-of-the-art facility in the heart of Silicon Valley is optimized for manufacturing spacecraft and rapid, flexible payload integration at scale. From climate monitoring to national security, Muon Space is dedicated to delivering Earth Intelligence for a safer and more resilient world. Taking Care of Our Team At Muon salary is only part of our total compensation package. In addition to salary, full-time employees receive equity compensation as well as benefits including medical, dental, and vision insurance, a 401k retirement plan, short & long term disability and life insurance. We also offer three weeks paid vacation for new employees, along with 12 paid holidays, unlimited sick time and paid parental leave. Our mission embraces the entire planet and we believe our team should too.  Muon is dedicated to creating a diverse and dynamic company and workforce. We believe in equal employment opportunity regardless of race, color, ancestry, religion, sex, age, national origin, citizenship, sexual orientation, marital status, disability, or gender identity. We value diversity in the workplace, and that starts with our applicants. We encourage you to apply, even if you don't check all the boxes, and we look forward to reviewing your application! In addition, if you need a reasonable accommodation as part of your application for employment or interviews with us, please let us know. ITAR/EAR Requirements This position requires access to export controlled information. To conform to U.S. Government export regulations applicable to that information, applicant must either be (A) a U.S. person, defined as a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (green card holder), (iii) refugee under 8 U.S.C. § 1157, or (iv) asylee under 8 U.S.C. § 1158, (B) eligible to access the export controlled information without a required export authorization, or (C) eligible and reasonably likely to obtain the required export authorization from the applicable U.S. government agency. The Company may, for legitimate business reasons, decline to pursue any export licensing process. ## About Muon Space ## Company Overview - **One-liner**: Muon Space designs, builds, and operates satellite constellations optimized for Earth observation and remote sensing missions for government and commercial customers. - **Entity Type**: Private (Series B) - **Headquarters**: San Jose, California, USA (with additional offices in Mountain View, CA; Washington D.C. Metro Area; and Northern Virginia) - **Founded**: 2021 - **Founders**: Jonny Dyer (CEO/Co-founder), Dan McCleese (Chief Scientist/Co-founder), Pascal Stang (CTO/Co-founder), and Paul Day (VP Production/Co-founder) ## Core Business - **Primary industry/industries**: Aerospace & Defense, Space Technology, Satellite Manufacturing, Earth Observation/Remote Sensing - **Target customers**: B2G (US Air Force, US Space Force, government agencies) and B2B (commercial agriculture companies like Hydrosat, private enterprises) - **Mission statement**: "Building constellations for a safe and resilient world" — empowering humanity to address global challenges and support a livable planet through advanced satellite technology. ## Products & Services - **Muon Halo™**: The company’s flagship integrated technology stack for satellite constellation development. It combines the MuSim digital engineering and simulation platform, the MuOS data-centric middleware architecture, and the MuSat and MuCore software-defined building blocks. This stack enables rapid, low-cost deployment of high-performance constellations using modular "CarefulCOTS" hardware and service-oriented software. - **Earth Intelligence**: A data and analytics offering that integrates physical sciences, aerospace engineering, software, and domain expertise to provide dynamic understanding of the planet for managing natural resources, enhancing safety/security, and supporting global challenges. - **Custom Satellite Constellation Services**: A three-phase approach (Design, Build, Operate) to deliver end-to-end satellite constellation development, from mission architecture optimization through manufacturing, launch, and ongoing operations. ## Market Standing - **Valuation/Market Cap**: Not publicly disclosed - **Key Metric**: Total funding raised — Muon Space has raised significant venture capital (Series B round closed; specific amount not cited in available sources but the company is well-capitalized for a space startup) - **Notable Investors/Partners**: Partners include the USAF and USSF, Hydrosat (agriculture), and other government agencies and commercial organizations. The company is backed by leading venture investors in the space/defense sector. - **Growth Signals**: - Recognized as one of **America’s Greatest Startup Workplaces 2025** (by a workplace excellence award program) - Named one of **Fast Company’s Most Innovative Companies in Space for 2025** for cutting-edge weather-monitoring satellites - Opened a high-mix satellite manufacturing facility in San Jose, indicating scaling production capacity - Growing headcount: currently listing **44 open positions** across engineering, operations, go-to-market, and G&A - Team includes industry veterans from Skybox, NASA, SpaceX, and other leading aerospace organizations ## Competitive Advantages - **Vertically Integrated Technology Stack**: Muon Halo™ combines digital simulation, middleware OS, and software-defined hardware into a unified platform, enabling faster time-to-orbit and lower costs than traditional bespoke satellite development. - **High-Mix Manufacturing**: A state-of-the-art production facility optimized for building diverse satellite configurations at volumes typical of standard bus lines — a rare capability in the industry. - **Proven Government & Commercial Traction**: Contracts with the US Air Force, US Space Force, and commercial partners like Hydrosat demonstrate credibility and recurring demand. - **Team Expertise**: Founders and leadership come from Skybox, NASA, SpaceX, and other top-tier organizations, bringing deep domain knowledge and a track record of execution. ## Strategic Focus - **Scaling Constellation Operations**: Moving from design/build phases to full operational constellations, with emphasis on automated planning, tasking, and data backhaul. - **Expanding Earth Intelligence Offerings**: Developing weather-monitoring and geospatial analytics to address climate, agriculture, and national security applications. - **Government & Defense Growth**: Deepening partnerships with US and allied government agencies for resilient space-based capabilities. - **Talent Acquisition**: Actively hiring across hardware, software, mission engineering, and business development to support rapid growth. ## Why Work Here - **Mission-Driven Work**: Employees contribute directly to global challenges like climate monitoring, natural resource management, and national security — with tangible impact from space. - **Award-Winning Culture**: Named one of America’s Greatest Startup Workplaces 2025; culture built on trust, technical excellence, and shared accountability. - **Top-Tier Team**: Work alongside industry veterans from Skybox, NASA, SpaceX, and other leading organizations. - **Benefits & Perks**: - 100% health, dental, and vision coverage for employees (85% for dependents) - Concierge medical via One Medical - 401(k) plan through Betterment, equity management via Carta - Generous parental leave for primary and secondary caregivers - Generous time-off policy - Fully stocked kitchen, catered lunch 3x/week at HQ - Dog-friendly office - **Work Model**: Hybrid/remote flexibility for many roles (some positions listed as "San Jose, CA or Remote"); hardware roles are primarily on-site at San Jose or Mountain View facilities. - **Growth Opportunities**: With 44 open positions and rapid scaling, there is significant potential for career advancement and impact in a high-growth startup. ## Sources 1. [muonspace.com](https://www.muonspace.com/) 2. [muonspace.com/about](https://www.muonspace.com/about) 3. [muonspace.com/careers](https://www.muonspace.com/careers) 4. [muonspace.com/life-at-muon](https://www.muonspace.com/life-at-muon) 5. [job-boards.greenhouse.io/muonspace](http://job-boards.greenhouse.io/muonspace) ## Other roles at Muon Space - [Microwave Instrument Engineer](https://feeny.ai/job/microwave-instrument-engineer-muon-space-san-jose-3ke0nbcehez8) — San Jose, CA - [Benefits and Payroll Specialist](https://feeny.ai/job/benefits-and-payroll-specialist-muon-space-remote-dwh6ys0pg10d) - [Senior Network Security Engineer](https://feeny.ai/job/senior-network-security-engineer-muon-space-san-jose-ba57598pc2ps) — San Jose, CA - [Senior IT Engineer](https://feeny.ai/job/senior-it-engineer-muon-space-san-jose-scd7qggg3d5g) — San Jose, CA - [EHS Specialist](https://feeny.ai/job/ehs-specialist-muon-space-san-jose-1acyexy64qwv) — San Jose, CA - [Senior Director, Business Development USG Federal](https://feeny.ai/job/senior-director-business-development-usg-federal-muon-space-northern-0jsrtmzhjfxh) — Northern, VA - [Director, Manufacturing Architecture](https://feeny.ai/job/director-manufacturing-architecture-muon-space-san-jose-c4txjdsfdwqf) — San Jose, CA - [Software Engineer, Customer Solutions](https://feeny.ai/job/software-engineer-customer-solutions-muon-space-san-jose-z35s1gw7rmnk) — San Jose, CA - [Staff Spacecraft Platform Engineer](https://feeny.ai/job/staff-spacecraft-platform-engineer-muon-space-san-jose-q609r4nmn32e) — San Jose, CA - [Technician II, Testbeds & EGSE](https://feeny.ai/job/technician-ii-testbeds-egse-muon-space-san-jose-3nhajkgfefh4) — San Jose, CA