Define and drive reliability strategy, SLO frameworks, and operational best practices across Substrate workloads in highly regulated environments. Serve as an actively engaged senior on-call engineer (OCE), participating in on-call rotations and leading incident response for Substrate services in regulated environments. Provide hands-on leadership during the most complex or high-impact incidents, setting technical direction and response strategy. Drive high-quality post-incident reviews that result in durable, systemic engineering improvements across teams. Architect and deliver large-scale automation, observability, and self-healing solutions. Drive architectural decisions and define software engineering standards that make reliability, security, and compliance intrinsic to Substrate services. Influence service design and engineering decisions across organizational boundaries. Mentor senior and principal engineers and shape the long-term technical direction of the SRE discipline. Represent Substrate SRE perspectives with senior leadership and cross-functional partners. Doctorate Degree in Computer Science, Information Technology, or related field AND 2+ years technical experience in software engineering, network engineering, or systems administration OR Master's Degree in Computer Science, Information Technology, or related field AND 3+ years technical experience in software engineering, network engineering, or systems administration OR Bachelor's Degree in Computer Science, Information Technology, or related field AND 5+ years technical experience in software engineering, network engineering, or systems administration These requirements include but are not limited to the following specialized security screenings: These requirements include, but are not limited to the following specialized security screenings:US Government Security Clearance: This role requires access to Substrate's GCCM, GCCH, and DoD environments. Candidates must be able to obtain and maintain a favorably adjudicated T3 background investigation (Secret level, for GCCH/DoD) and CJIS screening (for GCCM). Candidates who do not yet hold these screenings but are eligible may be considered; continuation in this role is contingent on completing them. Citizenship & Citizenship Verification: This position requires verification of U.S. citizenship due to citizenship-based legal restrictions. Specifically, this position supports United States federal, state, and/or local United States government agency customer and is subject to certain citizenship-based restrictions where required or permitted by applicable law. To meet this legal requirement, citizenship will be verified via a valid passport, or other approved documents, or verified US government clearance. Doctorate Degree in Computer Science, Information Technology, or related field AND 5+ years technical experience in software engineering, network engineering, or systems administration OR Master's Degree in Computer Science, Information Technology, or related field AND 8+ years technical experience in software engineering, network engineering, or systems administration OR Bachelor's Degree in Computer Science, Information Technology, or related field AND 12+ years technical experience in software engineering, network engineering, or systems administration OR equivalent experience. 7+ years technical experience working with large-scale cloud or distributed systems.