Senior Engineer, Security Operations

Posted Monday, April 27, 2026 at 4:00 AM If you are looking for a career at a dynamic company with a people-first mindset and a deep culture of growth and autonomy, ACV is the right place for you! Competitive compensation packages and learning and development opportunities, ACV has what you need to advance to the next level in your career. We will continue to raise the bar every day by investing in our people and technology to help our customers succeed. We hire people who share our passion, bring innovative ideas to the table, and enjoy a collaborative atmosphere. Who we are: ACV is a technology company that has revolutionized how dealers buy and sell cars online. We are transforming the automotive industry. ACV Auctions Inc. (ACV), has applied innovation and user-designed, data driven applications and solutions. We are building the most trusted and efficient digital marketplace with data solutions for sourcing, selling and managing used vehicles with transparency and comprehensive insights that were once unimaginable. We are disruptors of the industry and we want you to join us on our journey. Our network of brands include ACV Auctions, ACV Transportation, ClearCar, MAX Digital and ACV Capital within its Marketplace Products, as well as, True360 and Data Services. At ACV we focus on the Health, Physical, Financial, Social and Emotional Wellness of our Teammates and, to support this, we offer: Multiple medical plans including a high deductible, low cost health plan Company-sponsored (paid) Short-Term Disability, Long-Term Disability, and Life Insurance Comprehensive optional benefits such as Dental, Vision, Supplemental Life/AD&D, Legal/ID Protection, and Accident and Critical Illness Insurance Generous paid time off options, including uncapped vacation days, the greater of 3 paid sick days or in accordance with the applicable state or local paid sick leave law, 6 paid company holidays, 2 floating holidays, parental leave, bereavement leave, jury duty leave, voting leave, and other forms of paid leave as required by applicable law or regulation Employee Stock Purchase Program with additional opportunities to earn stock in the Company Retirement planning through the Company’s 401(k) Who we are looking for: The Senior Operations Engineer is a critical role responsible for the overall security posture of ACV Auctions Threat landscape. Reporting directly to the Director of Cybersecurity Operations, this individual will own and mature the Security Operations program, integrating security practices throughout the environment. This position requires a self-motivated and highly organized engineer with excellent communication and technical skills. Senior engineer is technical leader who sets technical direction for security operations engineering initiatives. Leads complex, high-impact projects and serves as the escalation point for difficult engineering challenges and opportunities. Drives innovation in security capabilities and represents engineering to the broader organization. What you will do: Lead proactive, hypothesis-driven threat hunting across endpoint, cloud, and identity environments Develop and refine detection logic, correlation rules, and behavioral analytics within SIEM and EDR platforms Map adversary tactics, techniques, and procedures (TTPs) to MITRE ATT&CK to improve detection coverage Analyze threat intelligence and emerging attack patterns to strengthen defenses Lead and scale cybersecurity operations across enterprise or multi-tenant environments Oversee incident triage, investigation, containment, and remediation Act as escalation point for high-severity incidents Improve alert fidelity and reduce false positives through tuning and automation Mature the alert and incident management tracking systems Standardize workflows and playbooks to ensure operational consistency Design and implement incident response frameworks and playbooks Lead response efforts for advanced threats across environments supporting up to large user bases Conduct root cause analysis and post-incident reviews Automate response actions to reduce mean time to detect/respond (MTTD/MTTR) Secure multi-cloud environments (AWS, GCP) through posture management and configuration monitoring Detection of Zero Trust principles and violations across identity and access management systems Strengthen controls within platforms such as, CASB and DLP solutions Automate workflows and security operations processes for tracking the remediations actioned against the environment Integrate tooling and orchestrate response using SOAR or similar platforms Continuously improve detection capabilities and operational efficiency Deliver AI enabled automations and tooling for the ACV Security Operations Center Deliver executive-level reporting (MBRs/QBRs) on security posture, threats, and risk Translate technical findings into business-relevant insights to present to external stakeholders Collaborate cross-functionally with IT, engineering, and leadership teams Perform additional duties as assigned. What you will need: 8+ years’ experience Minimum of a 4 year Bachelor’s degree Strong understanding of security frameworks and best practices (NIST CSF, ISO 27001, CIS Controls). Extensive experience with cloud security, with a strong focus on securing applications deployed in AWS and/or GCP environments. Experience with Fintech companies is desirable. Experience with modern software development including Agentic and Generative AI techniques. Familiarity with adversarial AI/ML techniques and their protections, such as Interference attacks and others in the MITRE ATLAS framework. Excellent communication, interpersonal, and leadership skills, with an ability to translate complex technical risks into business context for executive leadership and stakeholders. Ability to work effectively in a remote environment and manage geographically dispersed teams. Excellent communication, interpersonal and leadership skills, with the ability to interact with staff at all levels. Knowledge of CASB, DLP and SASE technologies Proven ability to be agile and work effectively in a dynamic environment. Demonstrated ability to perform under pressure and respond rapidly to emerging incidents and situations. Excellent coordination, project management, and organization skills and comfortable with multi-tasking in a high-energy environment. Should be a creative and analytical problem solver with a passion to provide excellent customer service. Practical hands-on experience engineering and implementing data security controls in cloud environments including databases, datastores and SaaS platforms. Linux and Kubernetes/Container management and security DevOps code based implementation and management Knowledge of AWS including but not limited to S3, Lambda, RDS, EC2 and AWS Security Center Understanding of TCP/IP Networking including knowledge of Protocols and Services Understanding of what Information or Assets are of value to Threat Actors and how Organizations are Breached and Customer Accounts Compromised. Overall understanding of the Security domain, compliance, business, risk, ops etc ALONG with its application to the business. #LI-AM3 Our Values Trust & Transparency | People First | Positive Experiences | Calm Persistence | Never Settling At ACV, we are committed to an inclusive culture in which every individual is welcomed and empowered to celebrate their true selves. We achieve this by fostering a work environment of acceptance and understanding that is free from discrimination. ACV is committed to being an equal opportunity employer regardless of sex, race, creed, color, religion, marital status, national origin, age, pregnancy, sexual orientation, gender, gender identity, gender expression, genetic information, disability, military status, status as a veteran, or any other protected characteristic. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. If you have a disability or special need that requires reasonable accommodation, please let us know. For information on our collection and use of your personal information, please see our Privacy Notice. No immigration or work visa sponsorship provided for this position. Compensation : The compensation range for this position is listed in the "Job Details" section at the bottom of this posting. Please note that final compensation will be determined based upon the applicant's relevant experience, skill set, location, business needs, market demands, and other factors as permitted by law.