Senior Security Engineer

Who you are

• 4+ years of experience in security engineering or IT security operations, with meaningful hands-on experience across endpoint, mobile, and network security
• Willingness and ability to travel regularly, domestically and internationally, to Circle office locations, residences, and secure custody environments; this is a core requirement of the role, not an occasional ask
• Comfort and professionalism operating in executive and VIP environments. You are discreet, personable, and capable of delivering technical work seamlessly in high-visibility, high-sensitivity settings
• Hands-on proficiency with endpoint, mobile, and network security technologies, including day-to-day security operations as well as the provisioning, configuration, troubleshooting, and validation of devices and controls for individual high-trust users and environments
• Strong attention to detail and a methodical approach to on-site configuration, documentation, and control validation; you do not cut corners in high-trust environments
• Familiarity with physical-logical security boundaries and the ability to coordinate effectively with Physical Security teams on shared control surfaces at office and key locations
• Solid understanding of zero-trust principles and how they apply to endpoint, mobile, network, and user environment security
• Ability to work independently in the field, exercise sound judgment without constant supervision, and escalate appropriately when something doesn't look right
• Strong communication skills, able to explain technical security requirements clearly to non-technical executive stakeholders and document work precisely for audit purposes
• Experience working in financial services, digital asset management, or financial technology is strongly desired
• Experience supporting security within office, co-location, or other sensitive operational environments, including site security assessments and the integration of technical and physical security controls
• Proven experience managing multiple vendor relationships, contract administration, and partner coordination

What the job involves

• Circle is seeking a hands-on and technically sharp Senior Security Engineer, Executive & Endpoint Security to contribute to Circle’s security program while serving as the primary on-site technical network and endpoint security resource for our most sensitive users and locations, including remote offices and other key company sites
• This role has two important pillars
• First, and as the primary focus, you will support Circle’s senior leaders and remote locations by implementing and maintaining tailored security controls and capabilities for our most sensitive users and environments
• This includes hands-on support for security needs that require a trusted local presence and close partnership with Physical Security
• Second, as a member of Security Operations, you will support Circle’s endpoint and network security programs across our operational environments and key company sites
• You will work alongside Security Operations engineers to implement, maintain, and troubleshoot endpoint, network, and infrastructure security controls, with an emphasis on capabilities requiring hands-on, on-site support
• You are comfortable operating across both worlds, from supporting senior leaders and sensitive locations to engineering and maintaining technical security controls across Circle’s endpoint and network environments
• If you take pride in precise execution, high-trust relationships, and hands-on work with a direct, tangible impact on the security of a global financial company, we would love to hear from you
• Serve as the primary on-site security resource for Circle’s senior leaders and remote locations, deploying, configuring, and validating tailored security controls with professionalism and discretion
• Configure and support endpoints, mobile devices, and related technology for senior leaders, ensuring security controls and approved configuration standards are implemented, validated, and maintained throughout the device lifecycle
• As a member of Security Operations, support Circle’s endpoint and network security programs across operational environments and key company sites, including the implementation, validation, troubleshooting, and maintenance of endpoint, network, and infrastructure security controls
• Perform on-site security assessments at key company locations, identify control gaps, and execute remediation activities in coordination with leadership and stakeholders
• Partner with Physical Security and other stakeholders at company locations to ensure endpoint, network, and infrastructure security controls complement physical security protections and site requirements
• Act as a trusted, in-person security contact for senior leaders and other key stakeholders, delivering a high-touch experience in sensitive and high-visibility settings
• Develop and maintain rigorous documentation, runbooks, deployment procedures, and configuration standards for on-site implementations, assessments, and control validation to support repeatable execution, operational continuity, and audit readiness
• Collaborate with IT, Physical Security, Compliance, Engineering, and other cross-functional teams to ensure security implementations align with company standards, operational requirements, and regulatory obligations
• Provide support for after-hours technical issue response and urgent operational escalation
• Travel as needed to support senior leaders, remote locations, operational environments, and key company sites

Benefits

• Remote-First and Flexible Work - Do your best work from home! Our remote jobs empower you to work around your life schedule. Want to switch up your work spot? We provide access to WeWork locations globally. Need time away? We offer flexible paid time off beyond paid holidays— so you can thrive at work and at rest.
• Health & Well-Being - No matter where you live, we offer a market competitive suite of benefits to help keep you and your loved ones healthy. We also keep your emotional well-being top of mind, offering an Employee Wellness Program for all employees and immediate family members globally. We also have various leave options, including 12 weeks of paid parental leave.
• Financial Planning - Circle is invested in your future! All part-time and full-time U.S. employees enjoy 401(k) benefits, including up to 4% company matching, and can become owners in Circle through our equity program. Pension plans are also offered in select countries. FSA and HSA accounts are available for U.S. employees, with Circle contributing annually to employee HSA accounts.
• Stipends & Reimbursements - To support our employees and their unique lifestyles, Circle offers a set of stipends and reimbursements (offerings vary by location and enrollment). These include home office, mobile phone, fitness and weight loss, and more!
• Learning & Development - Circle is committed to cultivating experiences internally and externally that promote constant learning in support of Crypto Literacy, as well as operational and interpersonal development that drives growth aligned with career aspirations for employees at all levels of the organization.
• In-Person Connections - Outside of our remote work, we know how important collaborating in-person is. We invest in bringing Circlers together through an annual company-wide conference, local meet ups as well as team and leadership offsites to lock in relationships beyond the screen.