Title: Application Support Engineer (2pm-10pm CST Shift) Location: Dallas, TE, United States Job Description: - Job Identification213851 - Job CategoryInformation Technology - Locations 1333 Crestside Drive, Coppell, TX, 75019, US - Job ScheduleFull time - Salary RangeAssociate-60,000-115,000-USD - Featured OpportunitiesNo - FLSA StatusExempt Job Description Are you ready to make an impact at DTCC? Do you want to work on innovative projects, collaborate with a dynamic and supportive team, and receive investment in your professional development? At DTCC, we are at the forefront of innovation in the financial markets. We are committed to helping our employees grow and succeed. We believe that you have the skills and drive to make a real impact. We foster a thriving internal community and are committed to creating a workplace that looks like the world that we serve. The Information Technology group delivers secure, reliable technology solutions that enable DTCC to be the trusted infrastructure of the global capital markets. The team delivers high-quality information through activities that include development of essential, building infrastructure capabilities to meet client needs and implementing data standards and governance. Pay and Benefits: - Competitive compensation, including base pay and annual incentive - Comprehensive health and life insurance and well-being benefits, based on location - Pension / Retirement benefits - Paid Time Off and Personal/Family Care, and other leaves of absence when needed to support your physical, financial, and emotional well-being. - DTCC offers a flexible/hybrid model of 3 days onsite and 2 days remote (onsite Tuesdays, Wednesdays and a third day unique to each team or employee). This will be a 2pm-10pm CST Shift role. The Impact you will have in this role: The Development family is responsible for creating, designing, deploying, and supporting applications, programs, and software solutions. May include research, new development, prototyping, modification, reuse, re-engineering, maintenance, or any other activities related to software products used internally or externally on product platforms supported by the firm. The software development process requires in-depth subject matter expertise in existing and emerging development methodologies, tools, and programming languages. Software Developers work closely with business partners and / or external clients in defining requirements and implementing solutions. The Application Support Engineering role specializes in maintaining and providing technical support for all applications that are beyond the development stage and are running in the daily operations of the firm. Works closely with development teams, infrastructure partners, and internal / external clients to escalate and resolve technical support incidents. Your Primary Responsibilities: - Support DTCC applications by providing monitoring, application, and system support for DTCC‘s production application services client facing environments.  - Provide 24x7 support for event monitoring, incident triage and critical issue  - Implementation of efficiencies and improvements to standard processes and procedures such as automation through scripting, programming, etc.  - Support for organizational change and execution of DTCC’s production application services  - Support disaster recovery test planning and execution - application environment review, shutdown, start, verification, troubleshooting  - Support risk and control processes into day to day responsibilities to monitor and mitigate risk; advance appropriately  Qualifications: - Minimum of 4 years of related experience - Bachelor's degree preferred or equivalent experience Talents Needed for Success: - Knowledge on application support – basic programming skills, log reading and analysis  - Distributed Application troubleshooting and Support skills.  - Familiarity working with relational databases (DB2, Oracle, Snowflake) - Monitoring and Data Tools experience (Splunk, DynaTrace, Thousand Eyes, Grafana, Selenium, HiPam IBM Zolda) - Familiarity with Cloud Technologies (AWS services (S3, EC2, Lambda, SQS, IAM roles), Azure, OpenShift, RDS Aurora, Postgress) - Middleware experience (Solace, Tomcat, Liberty Server, WebSphere, WebLogic, JBoss) - Messaging Queue Systems (IBM MQ, Oracle AQ, ActiveMQ, RabbitMQ, Kafka) - Scripting languages (Bash, Python, Ruby, Shell, Perl, JavaScript) - Strong problem-solving skills with the ability to think creatively. - Familiarity with Mainframe troubleshooting and support skills (COBOL, JCL, DB2, DB2 Stored Procedures, CICS, SPUFI, File aid) The salary range is indicative for roles at the same level within DTCC across all US locations. Actual salary is determined based on the role, location, individual experience, skills, and other considerations. We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status. We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.

• Technical liaison between customers, our partner companies and internal sales • Close collaboration with the customer’s development department, the local field sales team, and internal and external Arrow resources • Build and expand sustainable relationships within customers’ development teams at all levels from CTO to R&D Engineer • Identify new development projects at customer sites and support them from product concept through to mass production • Guide technical direction and priorities in customer projects based on Arrow’s strategy, our supplier portfolio, and market conditions • Develop optimal technical-commercial system solutions for our customers • Responsible for growing our business potential through targeted project work with defined strategic customers • Provide on-site technical consulting and support to customers in the design and selection of system components (focus on semiconductors for industrial applications such as embedded and HMI systems including software elements) • Advisory support function for our field sales team on technical matters • Prepare and conduct training sessions, technical meetings with customers and suppliers, and internal training for the local field sales team as needed

Role Description We're looking for a Webapp Offensive Security Engineer with deep, hands-on web application penetration testing experience to push our autonomous testing beyond what it can do today. You'll be testing real customer web applications — not just labs and benchmarks — using NodeZero as your starting point and then going further as the human expert: - Hunting the edge cases, novel attack chains, and business-logic flaws that automated testing doesn't yet handle. - Proving them out safely against live targets. - Working shoulder-to-shoulder with our software engineers to turn each discovery into durable product coverage that benefits every customer. This is a pentesting-first role. You won't be expected to architect platform internals or ship production features yourself — you'll be the offensive expert who tests live customer applications, finds the gaps NodeZero doesn't yet cover, demonstrates them, defines what "good" looks like, and partners with engineering to close them. Essential Functions - Perform hands-on, full-scope web application penetration tests against real customer applications, alongside benchmark and lab targets, to surface vulnerabilities and attack paths. - Review NodeZero results on live customer engagements to identify coverage gaps, blind spots, and missed opportunities. - Manually reproduce and validate edge cases, building reliable, production-safe proof-of-concept exploits and clear test cases. - Partner closely with software engineers to translate findings into product improvements. - Build and maintain a library of regression and benchmark test cases. - Monitor production pentests for missed findings and false positives; create and triage Jira tickets. - Work directly with customers and internal teams to investigate findings and explain attack paths. - Author technical blog posts and research write-ups showcasing new exploits, edge cases, and attack methodologies. - Mentor teammates and contribute to continuous improvement of team processes, methodology, and testing standards. Qualifications - Extensive hands-on experience conducting full-scope web application penetration tests. - Deep, practical knowledge of common and not-so-common web vulnerability classes. - A talent for finding and exploiting business-logic and edge-case flaws that automated scanners miss. - Strong command of proxy tools like Burp Suite and browser developer tools. - Comfort scripting to reproduce findings and build proof-of-concept exploits. - Ability to clearly communicate attack steps, impact, and remediation guidance. - Curiosity about emerging AI technologies and comfort using AI-assisted tools. - Strong written and verbal communication skills. - Ability to manage multiple priorities, work independently, and mentor teammates. - Quick to learn and adopt new technologies, frameworks, and target stacks. - History of recognized security research, including documented CVE discoveries. - Track record of successful bug bounty contributions. Desired/Nice to Have - Familiarity with how autonomous, agentic, or AI-driven pentesting tools work. - Experience writing detection or attack content. - Enough software development background to collaborate fluently with engineers. - Familiarity with relational and graph databases, particularly Postgres and Neo4j. - Experience with AI/LLM tools for building agentic workflows. Expectations - Outstanding problem-solving aptitude and a relentless curiosity for how things break. - Self-motivated and highly energetic, with the ability to operate effectively with limited supervision. - Work with engineers and security researchers to turn manual discoveries into reliable product capabilities. - Strong technical documentation and communication skills. - Document findings, methodologies, and recommendations for stakeholders. What makes you stand out - A portfolio of novel web application research, exploits, or edge-case findings. - Demonstrated examples of using AI to enhance or accelerate testing. - OSCP, OSWE, or comparable offensive security certifications. Benefits - Inclusive Team: We value diversity and promote an inclusive culture. - Growth Opportunities: Be part of a dynamic and growing team. - Innovative Culture: Work in a collaborative environment that encourages creativity. - Hybrid & Remote Work: Embrace a mix of remote and hybrid work models. - Competitive Compensation: We offer competitive salary, equity, and benefits. Compensation and Values At Horizon3, we believe that our people are our greatest asset, and our compensation philosophy reflects this core value. We are committed to fostering an environment where all employees feel valued, respected, and rewarded for their contributions. In accordance with various State’s transparency regulations, we provide the following salary range information for this position: - Base salary range: $196,000 - $242,000. - Additional compensation: All full-time roles are eligible for an equity package in the form of stock options. You Belong Here Horizon3 is not just an equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success. We welcome candidates from all backgrounds and experiences, and we encourage all qualified individuals to apply. Other Duties Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Duties, responsibilities, and activities may change at any time with or without notice.

• Provide the highest level of field support to our regional channel partners, consultants and potential users. • Provide advanced system design, deployment, programming, 3rd party integration and troubleshooting. • Work closely with Area Manager empowering channels, training and delivering lectures and certifications. • Work with the Regional Sales team to demonstrate products, design systems, support sales activities, visit channel partners and AV opportunities. • Monitor and report on relevant information from the field. • Collaborate internally with teams. • Attend regional, national and internal meetings as required. • Provide training and certification to regional partners and monitor progress to ensure up to date with Q-SYS capabilities.