Detection Engineering Lead

AspenView Technology Partners, Inc.; Argentina; On-site; ARS 3,000,000 - 6,000,000; Full time

Job summary

AspenView Technology Partners, Inc. is seeking a hands-on Detection Engineering Lead to own detection engineering for a large US lender. This on-site role is based in Buenos Aires, Argentina, with coordination across Bogotá and Medellín.

You will lead the Detection Engineer, set priorities, review rules, and present coverage to the client's security leadership. Responsibilities include end-to-end detection lifecycle, pipeline health, and detecting as code with version control.

Qualifications

• 8+ years writing and tuning detections in production on a SIEM or analytics platform.
• Ability to explain the reasoning behind a rule you shipped.
• Solid understanding of log pipelines and data flow between source and alert.

Responsibilities

• Own the detection inventory end to end with clear owners.
• Prioritize detection work based on threat intel, hunts, incidents and feedback.
• Build identity-centric detections on Okta and custom detections in CrowdStrike and Defender; provide MITRE ATT&CK coverage.

Skills

Detections engineering

Threat hunting

Rule writing

Team leadership

English communication

Tools

Elastic Security

Splunk

Sentinel

Chronicle

Cribl

CrowdStrike Falcon

Microsoft Defender

Okta System Log

AWS CloudTrail

GuardDuty

ServiceNow SecOps

Sigma

YARA

Caldera

Job description

Build the Future with AspenView Technology Partners
At AspenView, we are passionate about transforming the way organizations approach technology. We specialize in creating high-performing, nearshore IT teams to help North American clients innovate faster and more efficiently.

As we continue to grow, we’re looking for exceptional people to join our team and help drive impactful change across industries.

Why Join AspenView?
At AspenView, we’re more than a nearshore IT partner—we’re a people-first, purpose-driven company that believes great culture drives great outcomes. We’re passionate about connecting talent and technology to deliver measurable value for clients—and meaningful career paths for our people.

Here’s what you can expect:

• Competitive base
• Flexible work model: hybrid, remote, or in-office
• Real growth opportunities and leadership visibility
• Inclusive, respectful culture that blends U.S. innovation with Colombian heart
• A company that listens, invests in you, and celebrates wins together

The Detection Engineering Lead is a hands‑on professional responsible for owning detection engineering for a large US consumer lender whose 24/7 security operations run from AspenView’s secure offices in Bogotá, Medellín and Buenos Aires. Telemetry from CrowdStrike, Microsoft Defender, Okta, Palo Alto, Proofpoint and AWS flows through Abstract Security into Elastic, and alerts become ServiceNow cases. You will be responsible for what gets detected along that chain, and for proving it. Working on‑site from our Buenos Aires office, you will lead the team’s Detection Engineer, set priorities, review rules and decide what goes to the client for approval, working closely with the threat hunters on the same floor. You will report to the SOC / Cyber Operations Lead and present detection coverage directly to the client’s security leadership.

What you will do:

Detection Lifecycle & Prioritization

• Own the detection inventory end to end, including new use cases, tuning, health monitoring and retirement, each with a clear owner.
• Prioritize detection work based on threat intelligence, hunt findings, incidents and Tier 2 feedback, focusing on the techniques that matter most to a consumer lender.
• Build identity‑centric detections on Okta, custom detections in CrowdStrike and Microsoft Defender, and AWS control‑plane coverage.

Pipeline Health & Troubleshooting

• Troubleshoot the full telemetry chain end to end, from data reaching Abstract but not Elastic to alerts that fire but never become ServiceNow cases.
• Make sure the data feeding detections is parsed, normalized and enriched correctly.

Detection as Code & Reporting

• Run detection as code, with version control, peer review, testing against simulated attacks, and change records the client approves before alerting behavior changes.
• Produce MITRE ATT&CK coverage reporting for the client’s security leadership, gaps included.
• Lead and review the work of the team’s Detection Engineer, and turn threat hunting findings into production detections.

Tools & Technologies:

• SIEM & Detection: Elastic Security (EQL, ES|QL, KQL); Splunk, Sentinel or Chronicle also relevant.
• Data Pipeline: Abstract Security, or equivalents such as Cribl.
• Endpoint, Identity & Cloud: CrowdStrike Falcon, Microsoft Defender, Okta System Log, AWS CloudTrail and GuardDuty.
• Case Management: ServiceNow SecOps integration and alert routing.
• Testing & Automation (Bonus): Sigma, YARA, Atomic Red Team, Caldera, Python and SOAR playbooks.

What you bring:

• Experience: 8+ years writing and tuning detections in production on a SIEM or analytics platform, with the ability to explain the reasoning behind a rule you shipped. Solid understanding of log pipelines, including where data goes missing between source and alert.
• Engineering Discipline: You treat detections as code, with version control, peer review and testing before release. You can tell a client what a rule catches, what it misses and how you know.
• Communication / Leadership: Experience leading or mentoring engineers and giving candid reviews of their work. English at B2+ / C1 level, strong enough to present coverage, gaps included, to a client’s security leadership without an intermediary.
• Availability: Full-time, 100% on‑site from AspenView’s secure office in Buenos Aires, Argentina, on US Eastern business hours, with no on‑call rotation, and periodic travel to our offices in Bogotá or Medellín. This is a direct employment contract with AspenView (relación de dependencia), dedicated to one client. The office is access‑controlled, and access to the client environment requires identity, criminal background, employment and education checks, repeated periodically.
• Bonus Qualifications: Hands‑on Elastic Security (the most valuable extra on this stack); Abstract Security or Cribl; custom IOAs in CrowdStrike Falcon and advanced hunting in Microsoft Defender; financial services experience under NYDFS Part 500, SOX or PCI DSS; applying GenAI to detection work with evaluation behind it; and GCDA, GCIA, GCED, SC‑200 or Elastic certifications.

Visa Sponsorship
AspenView does not sponsor employment visas for this role. Applicants must be permanently authorized to work in their country of residence and must not require visa sponsorship now or in the future.

Equal Opportunity Employer
AspenView is proud to be an equal opportunity employer. We believe in creating an environment where all employees feel welcome, valued, and empowered to succeed. We celebrate diversity and strive to build a culture of inclusion where all individuals, regardless of their race, color, gender, gender identity or expression, sexual orientation, disability, age, or any other characteristic, can thrive. We encourage applicants from all walks of life to join our team and make a lasting impact.