IBM ACE (previously known as IIB) system administrator

We are looking for a seasoned Systems Engineer III to support large-scale IBM ACE (Application Connect Enterprise) environments across AWS and on-premises platforms. This role is ideal for an infrastructure professional who enjoys administering enterprise integration systems, solving complex technical issues, and helping maintain reliable, high-performing environments.
Responsibilities

• Administer and support IBM ACE infrastructure in both cloud and on-premises environments
• Monitor system health, performance, and availability to help ensure stable operations
• Perform routine maintenance, troubleshooting, and issue resolution for ACE systems
• Collaborate with technical teams to support deployment, configuration, and operational needs
• Help maintain secure, scalable, and well-managed integration platforms
• Support enterprise-level environments with a focus on reliability and operational excellence

Skills

• Hands-on experience with IBM ACE or IIB administration
• Experience supporting large-scale infrastructure environments
• Working knowledge of AWS and on-premises system administration
• Strong troubleshooting and problem-solving abilities
• Ability to work collaboratively across technical teams
• Clear communication and strong organizational skills

Preferred Skills

• Experience supporting enterprise integration platforms
• Familiarity with cloud-based and hybrid infrastructure environments
• Background in operations, platform support, or middleware administration
• Ability to work independently while managing multiple priorities
• Comfort working in a fast-paced technical environment

Horizontal is committed to fostering a welcoming, inclusive workplace where diverse perspectives are valued and everyone has the opportunity to thrive. We encourage candidates from all backgrounds to apply and bring their unique experiences, ideas, and strengths to the team.
By applying for this position, you acknowledge and agree that Horizontal Talent may contact you regarding your application using automated technology, including phone calls, SMS/text messages, or email, which may be delivered by our virtual AI recruiter, Alex.
Please apply through this online posting or by visiting our Job Board at Applications will be accepted for 4 weeks. For those that join the team, we offer competitive compensation and benefits including medical, dental, vision, and retirement. Check out all we have to offer and how you can become part of the Horizontal Talent Team. The pay range for this role is $32 - $65 per hour based on qualifications and experience.