# Senior Security Engineer [Cmgx](https://gurify.com/jobs?q=Cmgx) · London · Posted 6 weeks ago Senior [Security](https://gurify.com/jobs/security) [Apply on the original posting → (opens in a new tab)](https://jobs.lever.co/cmgx/b8180873-dd55-474b-80da-01a22c820f38) ## Job description The Company Capital Markets Gateway LLC (CMG) is a capital markets-focused fintech transforming global equity capital markets (ECM) through data, technology, and connectivity. As the preferred source for ECM analytics and the first network connecting the buy-side and sell-side for ECM workflows, we are committed to reshaping how capital markets operate. Founded in 2017 by a team of ECM practitioners, CMG has completed three successful fundraising rounds and is backed by a group of the world’s most prestigious financial institutions. The CMG platform is currently relied upon by 25 investment banks and 135 asset managers representing over $40 trillion in AUM. For more information, please visit www.cmgx.io. The Role We are hiring a Senior Security Engineer to lead our security risk management and governance work. This is a senior individual-contributor role for someone who thrives on owning large, ambiguous initiatives end-to-end and turning them into shipped, operationalized programs. You will report directly to the CISO, own cross-program initiatives, and collaborate closely with senior leadership across the firm. The core of the role is hands-on security risk management, threat modeling, security risk assessments, and security design and architecture reviews, paired with the governance and process work that scales the program. You will partner on customer due-diligence and SOC 2 evidence and turn security controls into repeatable workflows that fit how the business already works. You will apply that lens across the full control landscape: cloud security, supply-chain and vulnerability management, endpoint and identity, detection and response, and AI security. CMG operates in a highly regulated, client-facing market, so scope and impact here are unusually large for the level. We value strong collaboration and a deep sense of ownership: you will be trusted to take initiatives and run with them, often without an established process or a big team behind you. The defining shift for the program is moving from reactive to proactive, and this role is central to it. This is a high-growth-potential role: we expect the right person to start as a senior individual-contributor and grow into broader leadership, including people's leadership, as the function scales. The Company Capital Markets Gateway LLC (CMG) is a capital markets-focused fintech transforming global equity capital markets (ECM) through data, technology, and connectivity. As the preferred source for ECM analytics and the first network connecting the buy-side and sell-side for ECM workflows, we are committed to reshaping how capital markets operate. Founded in 2017 by a team of ECM practitioners, CMG has completed three successful fundraising rounds and is backed by a group of the world’s most prestigious financial institutions. The CMG platform is currently relied upon by 25 investment banks and 135 asset managers representing over $40 trillion in AUM. For more information, please visit www.cmgx.io. The Role We are hiring a Senior Security Engineer to lead our security risk management and governance work. This is a senior individual-contributor role for someone who thrives on owning large, ambiguous initiatives end-to-end and turning them into shipped, operationalized programs. You will report directly to the CISO, own cross-program initiatives, and collaborate closely with senior leadership across the firm. The core of the role is hands-on security risk management, threat modeling, security risk assessments, and security design and architecture reviews, paired with the governance and process work that scales the program. You will partner on customer due-diligence and SOC 2 evidence and turn security controls into repeatable workflows that fit how the business already works. You will apply that lens across the full control landscape: cloud security, supply-chain and vulnerability management, endpoint and identity, detection and response, and AI security. CMG operates in a highly regulated, client-facing market, so scope and impact here are unusually large for the level. We value strong collaboration and a deep sense of ownership: you will be trusted to take initiatives and run with them, often without an established process or a big team behind you. The defining shift for the program is moving from reactive to proactive, and this role is central to it. This is a high-growth-potential role: we expect the right person to start as a senior individual-contributor and grow into broader leadership, including people's leadership, as the function scales. CMG embraces our ongoing commitment to building a culture reflecting the people, perspectives, and passions it represents. We will accept nothing less than equity, inclusion, and belonging for all. With the only constant in life being change, we will always listen, learn, and improve for the betterment of our teams, customers, and communities. CMG is proud to be an Equal Opportunity Employer. **Live in Cmgx’s hiring system.** Read from the company's own applicant tracking system, not reposted from a job board — so it's a real, open requisition rather than an ad that outlived the role. We remove it as soon as it disappears at source. ## More jobs like this - DO [Senior Security Engineer](https://gurify.com/job/senior-security-engineer-at-docebo-4f96857ca867) Docebo · London, United Kingdom · last week - TR [Senior Application Security Engineer](https://gurify.com/job/senior-application-security-engineer-at-tripadvisor-f77e66b457b0) Tripadvisor · London, United Kingdom · last week - MO [Senior Developer Experience Security Engineer](https://gurify.com/job/senior-developer-experience-security-engineer-at-motorway-8088847ce3c6) Motorway · London · yesterday - XT [Security Engineer](https://gurify.com/job/security-engineer-at-xtxmarketstechnologies-1b8485e71b06) Xtxmarketstechnologies · London, United Kingdom · 2 weeks ago - FL [HIPAA Security Engineer](https://gurify.com/job/hipaa-security-engineer-at-flohealth-6cf9ed9b16dd) Flohealth · London · 2 weeks ago - SN [Senior Network Security Engineer - Natilik](https://gurify.com/job/senior-network-security-engineer-natilik-4350d3f41943) London, United Kingdom · 3 weeks ago ```json {"@context":"https://schema.org/","@type":"JobPosting","title":"Senior Security Engineer","description":"\u003Cp\u003EThe Company\u003Cbr /\u003E\u0026#160;\u003Cbr /\u003ECapital Markets Gateway LLC (CMG) is a capital markets-focused fintech transforming global equity capital markets (ECM) through data, technology, and connectivity. As the preferred source for ECM analytics and the first network connecting the buy-side and sell-side for ECM workflows, we are committed to reshaping how capital markets operate. Founded in 2017 by a team of ECM practitioners, CMG has completed three successful fundraising rounds and is backed by a group of the world\u2019s most prestigious financial institutions. The CMG platform is currently relied upon by 25 investment banks and 135 asset managers representing over $40 trillion in AUM. For more information, please visit www.cmgx.io.\u003Cbr /\u003EThe Role\u0026#160;\u003Cbr /\u003E\u0026#160;\u003Cbr /\u003EWe are hiring a Senior Security Engineer to lead our security risk management and governance work. This is a senior individual-contributor role for someone who thrives on owning large, ambiguous initiatives end-to-end and turning them into shipped, operationalized programs. You will report directly to the CISO, own cross-program initiatives, and collaborate closely with senior leadership across the firm.\u0026#160;\u003Cbr /\u003EThe core of the role is hands-on security risk management,\u0026#160;threat modeling, security risk assessments, and security design and architecture reviews, paired with the governance and process work that scales the program. You will partner on customer due-diligence and SOC 2 evidence and turn security controls into repeatable workflows that fit how the business already works. You will apply that lens across the full control landscape: cloud security, supply-chain and vulnerability management, endpoint and identity, detection and response, and AI security.\u0026#160;\u003Cbr /\u003ECMG operates in a highly regulated, client-facing market, so scope and impact here are unusually large for the level. We value strong collaboration and a deep sense of ownership: you will be trusted to take initiatives and run with them, often without an established process or a big team behind you. The defining shift for the program is moving from reactive to proactive, and this role is central to it. This is a high-growth-potential role: we expect the right person to start as a senior individual-contributor and grow into broader leadership, including people\u0026#39;s leadership, as the function scales.\u003C/p\u003E\u003Cp\u003EThe Company\u003Cbr /\u003E\u0026#160;\u003Cbr /\u003ECapital Markets Gateway LLC (CMG) is a capital markets-focused fintech transforming global equity capital markets (ECM) through data, technology, and connectivity. As the preferred source for ECM analytics and the first network connecting the buy-side and sell-side for ECM workflows, we are committed to reshaping how capital markets operate. Founded in 2017 by a team of ECM practitioners, CMG has completed three successful fundraising rounds and is backed by a group of the world\u2019s most prestigious financial institutions. The CMG platform is currently relied upon by 25 investment banks and 135 asset managers representing over $40 trillion in AUM. For more information, please visit www.cmgx.io.\u003Cbr /\u003EThe Role\u0026#160;\u003Cbr /\u003E\u0026#160;\u003Cbr /\u003EWe are hiring a Senior Security Engineer to lead our security risk management and governance work. This is a senior individual-contributor role for someone who thrives on owning large, ambiguous initiatives end-to-end and turning them into shipped, operationalized programs. You will report directly to the CISO, own cross-program initiatives, and collaborate closely with senior leadership across the firm.\u0026#160;\u003Cbr /\u003EThe core of the role is hands-on security risk management,\u0026#160;threat modeling, security risk assessments, and security design and architecture reviews, paired with the governance and process work that scales the program. You will partner on customer due-diligence and SOC 2 evidence and turn security controls into repeatable workflows that fit how the business already works. You will apply that lens across the full control landscape: cloud security, supply-chain and vulnerability management, endpoint and identity, detection and response, and AI security.\u0026#160;\u003Cbr /\u003ECMG operates in a highly regulated, client-facing market, so scope and impact here are unusually large for the level. We value strong collaboration and a deep sense of ownership: you will be trusted to take initiatives and run with them, often without an established process or a big team behind you. The defining shift for the program is moving from reactive to proactive, and this role is central to it. This is a high-growth-potential role: we expect the right person to start as a senior individual-contributor and grow into broader leadership, including people\u0026#39;s leadership, as the function scales.\u003C/p\u003E\u003Cp\u003ECMG embraces our ongoing commitment to building a culture reflecting the people, perspectives, and passions it represents. We will accept nothing less than equity, inclusion, and belonging for all. With the only constant in life being change, we will always listen, learn, and improve for the betterment of our teams, customers, and communities. CMG is proud to be an Equal Opportunity Employer.\u003C/p\u003E","identifier":{"@type":"PropertyValue","name":"Gurify","value":"senior-security-engineer-at-cmgx-59a661e34e23"},"url":"https://gurify.com/job/senior-security-engineer-at-cmgx-59a661e34e23","datePosted":"2026-07-15","validThrough":"2026-10-11T23:59:59Z","hiringOrganization":{"@type":"Organization","name":"Cmgx","sameAs":"https://jobs.lever.co/cmgx"},"directApply":false,"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressCountry":"GB","addressLocality":"London"}}} ``` ```json {"@context":"https://schema.org/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Jobs","item":"https://gurify.com/jobs"},{"@type":"ListItem","position":2,"name":"United Kingdom","item":"https://gurify.com/jobs/united-kingdom"},{"@type":"ListItem","position":3,"name":"Senior Security Engineer","item":"https://gurify.com/job/senior-security-engineer-at-cmgx-59a661e34e23"}]} ```