Mainframe Z/os Performance Expert

Sonoma Consulting Inc.

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Berlin, CT, us on site Until 8/21/2026 First posted February 23, 2026 Last posted February 23, 2026
Job description

Halo Group is a premier provider of IT talent. We place technology experts within
the teams of the world’s leading companies to help them build innovative
businesses that keep them one step closer to their customers and one step
ahead of the competition. We offer a meaningful work environment for
employees, attractive and interesting engagements for consultants, and cutting-edge
digital innovation for our customers.

We delight in helping our customers execute their digital vision. Big projects or
small, Halo Group knows that by combining the highest quality talent with our
unwavering support, we will become an invaluable extension of the team. Halo
Group's experienced consultants in Detroit, Atlanta and Dallas specialize in all
areas of product/project governance, UX/UI, multi-platform applications, quality
assurance/testing, cloud computing, and data analytics.

Since its inception, Halo Group has been recognized for numerous awards, including: 

- INC 5000
- Future 50
- 101 Best and Brightest
- Michigan 50 Companies to Watch
- Goldline Research - “Most Dependable Companies”
- Ernst & Young - “Entrepreneur of the Year” Finalist

At least 3 years of experience in creating requirement specifications based on Architecture/Design /Detailing of Processes
• At least 3 years of experience in Mainframe, RACF & ACF2 Migration Skills
• At least 2 years of experience in Development/ Configuration/solutions evaluation/ Validation and deployment
• Experience in z/OS Migrations/Upgrades and Creating SYSRES Volume
• Expert knowledge of Mainframe Catalogs.
• Expert Knowledge in SMPE and USERMODs.
• Expert in Mainframe Storage, DFSMS and Tape Devices
• Expertise in WLM , RMF/SMF .
• Expertise in SAS/MXG , Omegamon , CA MICS and any other Performance Tools.
• Expertise in WLM , RMF/SMF .
• Expertise in SAS/MXG , Omegamon , CA MICS and any other Performance Tools.
• Analytical and Communication skills
• Planning and Co-ordination skills
• Experience with project management

Bachelor’s degree or foreign equivalent required from an accredited institution. Will also consider three years of progressive experience in the specialty in lieu of every year of education.
• At least 4 years of experience with IT Infrastructure Skills.

** U.S. Citizens and those who are authorized to work independently in the United States are encouraged to apply. We are unable to sponsor at this time.

This is a Full-Time / Permanent job opportunity.

Only US Citizen, Green Card Holder, GC-EAD, H4-EAD & L2-EAD can apply.

** All your information will be kept confidential according to EEO guidelines.

About this role

Summary

Manage mainframe performance, migrations, and upgrade processes with expertise in z/OS systems.

Job title

Mainframe Z/os Performance Expert

Experience level

4+ years

Industry

information technology

Location requirements

on-site in Berlin, CT; no remote work

Salary

Not specified

Management role

No

Skills & keywords

Required skills

mainframeRACFACF2z/OSSMPESYSREScatalogsDFSMSTape DevicesWLMRMFSMFSASOmegamonCA MICS

Preferred skills

project managementanalytical skillscommunication skills

Specializations

mainframez/OSperformance toolsstoragemigration
Locations

Structured locations inferred from the posting.

Berlin, CT, USA

On-site City
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