Senior Site Reliability Engineer

About Coalfire

Coalfire is on a mission to make the world a safer place by solving our clients’ hardest cybersecurity challenges. We work at the cutting edge of technology to advise, assess, automate, and ultimately help companies navigate the ever-changing cybersecurity landscape. We are headquartered in Chicago, Illinois with offices across the U.S. and U.K., and we support clients around the world.

But that’s not who we are – that’s just what we do.

We are thought leaders, consultants, and cybersecurity experts, but above all else, we are a team of passionate problem-solvers who are hungry to learn, grow, and make a difference.

We’re looking for a Senior Engineer to lead complex initiatives and elevate our managed services capabilities. If you thrive on solving complex problems, building scalable solutions, and mentoring others, this role offers the opportunity to make an immediate impact in a fast-growing team.

• Hands‑on engineering work, including developing new deployments, automation scripts, and tooling to meet client deliverables focused on vulnerability management, infrastructure updates, and compliance requirements.
• Develop and maintain Infrastructure‑as‑Code (IaC), utilizing Coalfire standard modules for Terraform, Ansible, and CI/CD pipelines across projects.
• Partner with Technical Managers and engagement leads to evaluate risks, prioritize issues, and develop actionable mitigation plans across an SRE team’s portfolio of M&O clients.
• Contribute to technical playbooks, standards, and frameworks for operational excellence in managed services delivery.
• Own the patch management strategy for assigned environments, ensuring regulatory compliance and timely remediation of vulnerabilities.
• Oversee Identity and Access Management (IAM), implementing and enforcing security best practices to protect sensitive data and ensure proper access controls.
• Perform cloud administration and system administration tasks, such as provisioning resources, optimizing performance, and troubleshooting infrastructure issues.
• Adhere to established quality standards for engineering deliverables, aligning with internal protocols, compliance regulations, and project deadlines.
• Identify and communicate potential risks, working with relevant stakeholders to incorporate mitigation strategies that meet regulatory and client expectations.
• Contribute to day‑to‑day agile project management tasks, including tracking progress, providing updates, and ensuring assigned activities are completed on schedule.
• Mentor junior engineers, review their work, and help mature engineering practices.

• 5–7 years in systems engineering/SRE with increasing responsibility, including architecture design, operations, and automation.
• 4+ years in cloud infrastructure management (AWS, Azure, or GCP) with multi‑account and multi‑environment experience.
• 4+ years developing and maintaining IaC with Terraform/Ansible at scale.
• Direct experience leading at least 1 operational improvement (e.g., reducing toil, enhancing SLAs, improving incident response).
• Possess AWS Solutions Architect Professional certification.
• Demonstrated experience driving at least 1 successful team initiative and serving as the technical SME for a complex initiative.
• Advanced Cloud Expertise:
  Strong hands‑on experience with a major public cloud (AWS, Azure, or GCP), including architecture, security, and performance optimization.
• IaC Leadership:
  Deep understanding of Terraform, and modern CI/CD automation practices; capable of reviewing and improving team IaC workflows.
• Operational Excellence:
  Ability to lead troubleshooting of high‑impact incidents, implement monitoring solutions, and improve system reliability.
• Security‑First Mindset:
  Experienced in aligning engineering solutions with frameworks such as FedRAMP, CIS, and NIST.
• Collaboration & Leadership:
  Proven ability to lead cross‑functional projects, mentor team members, and influence stakeholders.
• Documentation & Communication:
  Skilled at creating technical documentation, architecture diagrams, and presenting complex solutions clearly to both technical and non‑technical audiences.
• Manage and maintain…