Data Security Engineer - Tuning

As a Security Data Engineer (Tuning) - Cyber/ Enterprise Security on the Enterprise Security team, you will be responsible for..

• Owning end-to-end security telemetry pipelines that support network traffic monitoring, threat hunting, custom detection engineering, and adversary detection. You will work backward from detection objectives to establish the data sources, collection methods, telemetry fields, retention, normalization, and data-quality controls needed for reliable detection coverage.
• Architect, build, and maintain security telemetry pipelines that identify, onboard, and ingest network, endpoint, identity, cloud, application, operational technology (OT), and security-infrastructure data—including NetFlow, packet capture (PCAP), virtual private cloud (VPC) flow logs, firewall and proxy logs, and Domain Name System (DNS) records—into centralized and deployed detection solutions.
• Determine telemetry needed for network monitoring, threat hunting, incident response, and custom detection engineering; map detection objectives to underlying data sources; and assess visibility gaps across on-premises, cloud, remote, and segmented environments.
• Normalize, enrich, parse, validate, and maintain telemetry using Open Cybersecurity Schema Framework (OCSF) or Common Information Model (CIM) standards; ensure data is quarriable and available for correlation; and troubleshoot ingestion, parsing, latency, retention, field-coverage, and data-quality issues across security information and event management (SIEM), data lake, analytics, and detection platforms.
• Design, write, deploy, and tune high-fidelity detection logic using Structured Query Language (SQL), Sigma, YARA-L, or Python for network-based attack techniques, including command-and-control beaconing, data exfiltration, and lateral movement; reduce false positives while maintaining detection signal; and support custom detection development through data discovery, enrichment, normalization, validation, and behavioral and tradecraft-based detection.
• Partner with network engineering and organizational stakeholders to evaluate network sensors, NetFlow and Internet Protocol Flow Information Export (IPFIX), DNS and proxy telemetry, firewall logs, intrusion detection and prevention systems (IDS/IPS), packet capture, Zeek or network metadata, and network detection and response (NDR) platforms.
• Establish telemetry health metrics, dashboards, and automated checks for missing, delayed, or malformed data; assess visibility across environments; and optimize telemetry architectures and ingestion pipelines for performance, scalability, reliability, and cost.

A successful candidate would possess these skills:

• Ability to work independently and collaborate as part of a team
• Effective written and verbal communication skills
• Meticulous attention to detail and quality of work product
• Ability to build and sustain professional relationships
• Ability to lead projects or workstreams
• Ability to manage and prioritize multiple tasks in a fast-paced and dynamic environment
• Strong interpersonal skills and professional demeanor
• Ability to meet deadlines
• Ability to provide clear guidance to others

• Bachelor's degree and 3+ years of experience in data engineering, data integration, security engineering, or security operations.
• An Active TS/SCI or SCI eligibility is required
• 3+ years of experience conducting data investigations and using scripting languages for data engineering workflows.
• 3+ years of experience using Structured Query Language (SQL) and Python to transform, validate, or analyze data
• Experience using MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK) for security log design
• Experience configuring or tuning data ingestion, parsing, normalization, or enrichment processes for security data
• Experience using a security information and event management (SIEM) platform, log management platform, or security data lake
• Ability to travel 10%, on average, based on the work you do and the clients and industries/sectors you serve.
• Must be legally authorized to work in the United States without the need for employer sponsorship, now or at any time in the future.

Preferred:

• Cyber threat hunting
• Experience with cloud data or security services in Amazon Web Services (AWS), Microsoft Azure, or Google Cloud Platform (GCP)
• Experience using version-control and continuous integration/continuous delivery (CI/CD) tooling to deploy engineering changes

For individuals assigned and/or hired to work in Colorado, Deloitte is required by law to include a reasonable estimate of the compensation range for this role. This compensation range is specific to Colorado and takes into account the wide range of factors that are considered in making compensation decisions including but not limited to skill sets; experience and training; licensure and certifications; and other business and organizational needs. At Deloitte, it is not typical for an individual to be hired at or near the top of the range for their role and compensation decisions are dependent on the facts and circumstances of each case. A reasonable estimate of the current range is $95,600 to $159,300.

You may also be eligible to participate in a discretionary annual incentive program, subject to the rules governing the program, whereby an award, if any, depends on various factors, including, without limitation, individual and organizational performance.