Threat Hunting Lead

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 We are seeking a Threat Hunting Lead to join the security operations team of a large US consumer lender in the financial services sector, working 100% on-site from AspenView’s secure office in Buenos Aires, Argentina. You’ll own the hunt plan and lead intelligence-driven hunts across endpoint, identity, network, email and AWS telemetry in Elastic, directing two Threat Hunting Analysts, one in Buenos Aires and one in Colombia, and working daily with the Detection Engineering Lead so that every good hunt ends as a working detection. This is a hands-on role for someone who has actually taken hunts from hypothesis to outcome and knows what living-off-the-land, credential abuse and lateral movement look like in real logs, not just someone who has triaged alerts from a queue. What you will do: Hunt Strategy & Planning
• Own the hunt plan, building hypotheses from threat intel on US consumer finance, recent incidents and known telemetry gaps.
• Decide which hypotheses get hunt time and set priorities for the team.
• Help the client decide where GenAI-enabled capabilities add value to hunting and where they don’t. Hunt Execution
• Run scheduled and ad hoc hunts across CrowdStrike, Defender, Okta, Palo Alto, Proofpoint and AWS data in Elastic.
• Track living-off-the-land techniques, credential and session abuse, and lateral movement, mapped to MITRE ATT&CK.
• Sweep the estate for related activity to support the incident response team during major incidents. Detection Handoff & Client Reporting
• Turn hunt outcomes into detection backlog items with Detection Engineering and make sure they ship.
• Write clear client hunt reports covering what was tested, found, ruled out and couldn’t be tested.
• Present results directly to the client’s security leadership. Team Leadership
• Direct and review the work of two Threat Hunting Analysts across Buenos Aires and Colombia.
• Mentor the team on hypothesis design, tradecraft and query quality. Tools & Technologies:
• Platforms & Infrastructure: Elastic Security (EQL, ES|QL), Splunk or Sentinel, Palo Alto, Proofpoint, VDI-based client environment.
• Security & Threat Intelligence: CrowdStrike Falcon, Microsoft Defender, SentinelOne, Okta, MITRE ATT&CK, MISP, OpenCTI, Recorded Future, FS-ISAC.
• Cloud & Data Analysis: AWS telemetry, Python, Jupyter. What you bring:
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Experience:
5+ years in threat hunting, Tier 3 investigation or incident response, with hunts you can walk through from hypothesis to outcome.
• Querying: Fluent SIEM or data-platform querying (Elastic, Splunk, Sentinel or equivalent) across large data sets.
• Tradecraft: Solid MITRE ATT&CK knowledge and a sharp eye for LOTL, credential/session abuse and lateral movement in logs.
• Consulting / Leadership: Experience leading or mentoring hunters or analysts, including across different locations, and confidence presenting to client security leadership.
• Mindset: Hypothesis-driven, candid when a hunt comes up empty, and focused on getting detections shipped.
• Language: Fluent English, at B2+ / C1 level.
• Nice to have: Elastic EQL/ES|QL, deep EDR experience, Okta and AWS hunting, threat intel platforms, Python/Jupyter, financial-sector threat knowledge (fraud, ransomware, BEC), detection writing, and GCTI, GDAT, GCIH or eCTHP certification.
• Clearance: Must pass identity, criminal-background, employment and education checks, repeated periodically.
• Location & Schedule: Full-time, 100% on-site from AspenView’s secure office in Buenos Aires, Argentina, on US Eastern business hours (10:00–19:00 Buenos Aires time from November to March, 09:00–18:00 the rest of the year). No shift rotation, but you may be pulled in during a major incident. Direct employment contract with AspenView (relación de dependencia), dedicated to one client.