Data Security Engineer (Tuning)

Position Summary Our Deloitte Cyber team understands the unique challenges and opportunities businesses face in cybersecurity. Join our team to deliver powerful solutions to help our clients navigate the ever-changing threat landscape. Through powerful solutions and managed services that simplify complexity, we enable our clients to operate with resilience, grow with confidence, and proactively manage to secure success. Recruiting for this position will end 11/30/2026.Work You’ll Do 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 queryable 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 teamEffective written and verbal communication skillsMeticulous attention to detail and quality of work productAbility to build and sustain professional relationshipsAbility to lead projects or workstreamsAbility to manage and prioritize multiple tasks in a fast-paced and dynamic environmentStrong interpersonal skills and professional demeanorAbility to meet deadlinesAbility to provide clear guidance to others The Team Deloitte’s Government & Public Services (GPS) practice – our people, ideas, technology and outcomes – is designed for impact. Serving federal, state, & local government clients as well as public higher education institutions, our team of professionals brings fresh perspective to help clients anticipate disruption, reimagine the possible, and fulfill their mission promise. Our Enterprise Security offering embeds security in all aspects of digital transformation by securing a client’s technical backbone while enabling secure digital transformation. Includes security architecture, secure development and deployment, end-to-end cyber cloud capabilities, application security, and security for emerging technologies and connected products. The Project Delivery Talent Model is designed for professionals with specialized skills that align to a current client need. Team members focus on delivering services to clients, without additional expectations related to business development or promotion. Their employment is tied to their role on a project, and they are eligible for a benefits package that is competitive for project delivery-focused professionals. Qualifications Required: Associate degree and 6+ years of experience in data engineering, data integration, security engineering, or security operations; or bachelor’s degree and 3+ years of experience in data engineering, data integration, security engineering, or security operationsAn Active TS/SCI or SCI eligibility is required3+ years of experience conducting data investigations and using scripting languages for data engineering workflows.+ years of experience using Structured Query Language (SQL) and Python to transform, validate, or analyze dataExperience using MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK) for security log designExperience configuring or tuning data ingestion, parsing, normalization, or enrichment processes for security dataExperience using a security information and event management (SIEM) platform, log management platform, or security data lakeAbility 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 huntingExperience 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 changesFor 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. Information for applicants with a need for accommodation: Deloitte is committed to providing reasonable accommodations for people with disabilities. If you require a reasonable accommodation to participate in the recruiting process, please direct your inquiries to the Global Call Center (GCC) at View email address on click.appcast.io. Recruiting tips From developing a stand out resume to putting your best foot forward in the interview, we want you to feel prepared and confident as you explore opportunities at Deloitte. Check out recruiting tips from Deloitte recruiters. BenefitsAt Deloitte, we know that great people make a great organization. We value our people and offer employees a broad range of benefits. Learn more about what working at Deloitte can mean for you. Our people and culture Our inclusive culture empowers our people to be who they are, contribute their unique perspectives, and make a difference individually and collectively. It enables us to leverage different ways of thinking, ideas, and perspectives, and bring more creativity and innovation to help solve our clients' most complex challenges. This makes Deloitte one of the most rewarding places to work. Our purpose Deloitte’s purpose is to make an impact that matters for our people, clients, and communities. At Deloitte, purpose is synonymous with how we work every day. It defines who we are. Our purpose comes through in our work with clients that enables impact and value in their organizations, as well as through our own investments, commitments, and actions across areas that help drive positive outcomes for our communities. Learn more. Professional development From entry-level employees to senior leaders, we believe there’s always room to learn. We offer opportunities to build new skills, take on leadership opportunities and connect and grow through mentorship. From on-the-job learning experiences to formal development programs, our professionals have a variety of opportunities to continue to grow throughout their career. As used in this posting, "Deloitte" means Deloitte & Touche LLP, a subsidiary of Deloitte LLP. Please see for a detailed description of the legal structure of Deloitte LLP and its subsidiaries. Certain services may not be available to attest clients under the rules and regulations of public accounting. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or protected veteran status, or any other legally protected basis, in accordance with applicable law. Requisition code: 370689 Job ID 370689 Engineering and Product | Security Engineering