[Hiring] Cyber Threat Hunter @CELESTIAL INNOVATIONS GROUP LLC

Role Description

Celestial Innovations Group (CIG) is looking for experienced threat hunters focused on digital forensics and incident response. We are looking for practitioners who have hunted, investigated, and contained real intrusions, and who can take an alert, an indicator, or a hypothesis and turn it into a confident, documented answer about what happened.

You will work alongside an established incident response team on active matters including ransomware and extortion events, cloud account and identity compromises in AWS and Azure, and hands-on-keyboard network intrusions. Engagements move fast: the first 24 to 72 hours often determine the outcome, and you will need to become effective in a new client environment within hours. Many investigations are conducted at the direction of legal counsel, so precise, factual documentation is essential.

We are hiring for two focus areas:

• Endpoint Threat Hunter
• Cloud Threat Hunter

Candidates strong in both are especially welcome.

Qualifications

• 5+ years in cybersecurity, including at least 3 years of hands-on incident response or threat hunting on real intrusions
• 2+ years of detection engineering: writing, testing, and tuning detections in production
• Direct experience on ransomware or cloud compromise investigations, ideally in a commercial or multi-tenant setting
• Proficient in at least two of CrowdStrike Falcon, SentinelOne Singularity, and Microsoft Defender for Endpoint, with working knowledge of the third (Endpoint focus)
• Proficient in AWS, Azure/Entra ID/Microsoft 365, and/or GCP log investigation, with working knowledge of at least one of the EDR platforms above (Cloud focus)
• Production-quality hunting queries in KQL plus at least one of CrowdStrike Query Language, SentinelOne PowerQuery, or SQL; comfortable reading Splunk SPL
• Ability to write and tune Sigma and YARA rules and map findings to MITRE ATT&CK
• Scripting in PowerShell and Python
• Solid forensic fundamentals: Windows artifacts (event logs, registry, Prefetch, Amcache, Shimcache, SRUM, $MFT, USN journal), Linux and macOS logs and persistence, triage tools such as KAPE or Velociraptor, the Eric Zimmerman tools, timelining, and basic memory analysis with Volatility or similar
• Knowledge of current ransomware tactics, common initial access vectors, and exfiltration tools such as Rclone, MEGAsync, and Restic
• Understanding of chain of custody and evidence handling that will withstand legal scrutiny
• Strong written English and the ability to brief non-technical stakeholders
• Availability for the full period of performance, including participation in potential on-call rotation covering nights, weekends, and holidays
• Must be a U.S. citizen and reside in the United States
• Must have a commercial background check completed within the last 6 months, or be willing to complete one prior to start

Requirements

• Validate and tune EDR deployments in new environments, including policy configuration and sensor health review (Endpoint Threat Hunters)
• Hunt for credential dumping, remote access tool abuse, living off the land binaries, lateral movement, and persistence (Endpoint Threat Hunters)
• Execute host isolation, process termination, file quarantine, and account disablement (Endpoint Threat Hunters)
• Collect forensic artifacts remotely using EDR live response capabilities (Endpoint Threat Hunters)
• Identify, collect, and preserve cloud logs at engagement start and flag logging gaps (Cloud Threat Hunters)
• Hunt for identity-based attacks such as token theft, AiTM and device code phishing, MFA fatigue, malicious OAuth grants, and service principal or IAM role abuse (Cloud Threat Hunters)
• Trace attacker activity across control plane and data plane logs to establish what was created, changed, accessed, or exfiltrated (Cloud Threat Hunters)
• Support containment such as key rotation, session revocation, Conditional Access changes, and removal of attacker persistence (Cloud Threat Hunters)

Benefits

• 401(k)
• Competitive salary
• Dental insurance
• Health insurance
• Paid time off
• Training & development
• Vision insurance

Work Environment

• Fully remote with standard business-hours coverage in your time zone, plus potential on-call rotation
• Accounts, tools, and equipment provided as needed
• Strict confidentiality and client data separation required