At Kepler Communications, we're not just imagining the future of on-demand space connectivity - we're leading it
Our mission is to provide real-time on-orbit connectivity for critical missions, enabling a new era of data-driven intelligence and innovation. With 33 satellites launched to date, Kepler operates the first commercial optical data relay constellation, enabling real-time, continuous space communications while supporting advanced on-orbit compute and hosted payload capabilities.
Industry-leading technology is only part of the story. What sets Kepler apart is our team: bold thinkers, skilled builders, and passionate problem-solvers who thrive on pushing the boundaries of what’s possible in space. We believe great ideas come from diverse perspectives, and we’re committed to creating an environment where you can grow, lead, and make a global impact.
If you’re ready to reach higher, move faster, and do work that shapes the future space economy - this is your launchpad. Come build the future with Kepler
What We Offer:
* Competitive compensation with a robust equity plan to share in our success.
* Comprehensive coverage for health, dental, and vision insurance—including dependents.
* Unlimited vacation, supportive parental leave policy, and company-wide holiday shutdown.
* Semi-annual company-wide parties and frequent in-office team events.
* Relocation packages available for approved roles.
* $1,500 annual professional development fund to support your growth.
* Fully stocked Toronto office kitchen with snacks, drinks, games and top-notch kitchen appliances.
* Town Halls, Celebration Calls, and Company-wide events to stay connected and engaged.
* We’re a certified Outstanding Place to Work, seven years in a row
As Senior Infrastructure Security Specialist ,



you will protect Kepler’s corporate, cloud, and operational infrastructure. Reporting to the VP, Information Security & CISO, you will own and improve infrastructure security capabilities, including vulnerability management, security monitoring, endpoint protection, system hardening, and incident response.
You will partner with IT, Engineering, Operations, and other teams to reduce security risk while supporting Kepler’s growth. The role also supports regulated and Government of Canada environments that may process Protected or Classified information.
This Toronto-based role follows a hybrid model, with approximately 40% of time spent on-site.
Key Responsibilities:
Infrastructure Security
Provide security expertise for infrastructure, cloud environments, networks, systems, databases, and identity technologies
Review architectures and infrastructure changes to identify risks and recommend practical controls
Develop secure configuration and hardening standards based on CIS Benchmarks, NIST guidance, and industry best practices
Support network security controls, including firewalls, segmentation, secure remote access, and intrusion detection and prevention
Partner with IT and Engineering to incorporate security into infrastructure design and operations
Vulnerability Management
Own Kepler’s infrastructure vulnerability management program
Manage authenticated scanning, validate coverage,



assess findings, and prioritize remediation based on risk
Coordinate remediation with system owners and track vulnerabilities through resolution or approved risk acceptance
Measure vulnerability exposure, remediation performance, scanning coverage, and exceptions
Administer platforms such as Tenable or equivalent technologies
Security Monitoring and Endpoint Protection
Own and improve Kepler’s SIEM, security monitoring, and EDR/XDR capabilities
Integrate log sources and develop detection use cases across infrastructure, cloud, applications, identity, and security tools
Monitor logging coverage, platform health, and detection effectiveness
Investigate security alerts and support containment, remediation, and recovery
Coordinate investigations and service improvements with Kepler’s MDR/SOC provider
Administer platforms such as Securonix, Sentinel One, or comparable technologies
Incident Response, Cloud and Automation
Support incident investigations involving infrastructure, endpoints, networks, identity, and cloud environments
Analyze security telemetry, collect evidence, and coordinate containment and recovery
Assess and improve security controls within AWS and/or Microsoft Azure
Identify opportunities to automate monitoring, vulnerability management, and security operations using scripts, APIs, and security tools
Government and Regulated Environments
Implement technical controls for Government of Canada and other regulated environments
Support audits, security assessments, inspections, certifications, and remediation activities
Maintain documentation and evidence demonstrating that required security controls are operating effectively
Requir

📌 Senior infrastructure security specialist (Toronto)
🏢 Kepler Communications
📍 Toronto