Sine Nomine Associates

What Sine Nomine Associates does

Sine Nomine Associates is a privately held, small (1-10 employee) U.S. IT research and custom development consultancy founded in 2000 by Margarete Ziemer and headquartered in Leesburg, Virginia. The firm specializes in open-source software products and professional services for IBM mainframe environments, with core offerings spanning OpenAFS (a federated, single-namespace distributed file system), ClefOS (a CentOS-tracking Linux distribution for IBM Z), FABS (an AFS backup management suite), and z/VM and z/VSE utilities including an SSH/SCP/SFTP client suite developed with Barnard Software Inc. Its customer base is concentrated among government agencies, multinational corporations in finance, manufacturing and medicine, and academic and research institutions that run mission-critical workloads on mainframe infrastructure.

The business model combines quote-based professional services (consulting, custom open-source development, training, and part-time CTO engagements) with recurring OpenAFS support contracts, delivered primarily through direct enterprise sales and supported by a public download server and active community participation in the OpenAFS Foundation and the Open Mainframe Project. Go-to-market relies on content marketing via the company website, thought leadership in industry publications, and sustained sponsorship of VM Workshop and AFS Technologies Workshop conferences, complemented by IBM Champion designations for senior engineers.

The firm's technology differentiator is its rare, decades-deep expertise in integrating modern open-source stacks (Linux, Docker, OpenShift, MongoDB, Mono/.NET, Apache Spark) with legacy IBM Z infrastructure, including pioneering the virtual server farm concept on S/390. Recent product activity includes AlmaLinux for s390x, continued OpenAFS maintenance releases, and a late-2025 repositioning of OpenAFS around AI training infrastructure use cases. The company is constrained by its very small headcount, the absence of disclosed funding, and the loss of CTO David E. Boyes in September 2025.

Name

Sine Nomine Associates

Legal name

Sine Nomine Associates

Website

https://sinenomine.net

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

1–10 employees

Short description

Sine Nomine Associates is a small U.S. consultancy (1-10 employees, founded 2000) that builds and supports open-source products — notably OpenAFS and ClefOS — for IBM mainframe environments, serving government, enterprise, and academic clients with custom development, support, and training services.

Ownership category

akta.pro rank

Product category

Mainframe Open-Source Consulting and Software

NAICS

Custom Computer Programming Services (541511), Computer Systems Design and Related Services (54151)

SIC

Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Data Center Operations & Managed Services (Remote Hands, NOC/SOC) (HDABANAA)

Keywords

• Mainframe consulting services
• Linux on IBM Z
• Open-source mainframe tools
• Distributed file sharing
• Z/VM z/VSE support

Headquarters

HQ city

Leesburg

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Professional Services and Consulting: Custom-tailored consulting offerings for open source solutions including OpenAFS support, Linux on IBM Z implementation, and mainframe modernization services.
2. Support Contracts: Technical support services for OpenAFS and other open source products deployed in enterprise environments.
3. Training and Continuing Education: Educational services and training programs for OpenAFS and related technologies.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Sine Nomine Associates provides open-source software products and custom IT consulting for IBM mainframe (System z) environments. The company's core work spans OpenAFS (federated distributed file sharing), ClefOS (a Linux distribution for IBM Z), and a portfolio of utilities and services for z/VM and z/VSE, plus professional consulting, support, and training for organizations running mainframe and open-source infrastructure.

Product overview

Sine Nomine Associates offers a portfolio of open-source software products and professional services focused on IBM Z/mainframe computing and distributed file systems. The core products include OpenAFS (federated file sharing system), ClefOS (CentOS-based Linux distribution for IBM Z), FABS (backup management for AFS), and various z/VM/VSE utilities including SSH client suite. The company provides Mono/.NET services for mainframe Linux, MongoDB automation, Docker/OpenShift container services, and Spark deployment on System z. Services span consulting (data center, CTO, LinuxONE), custom open-source development, and training. The product architecture combines the OpenAFS distributed file system as a core platform with Linux operating system distributions (ClefOS, AlmaLinux) and supplementary tools (SSH utilities, NJE Bridge, HAO) for complete mainframe solutions.

Differentiator

Problem solved

Functional benefit

Brands

• ClefOS: Commercial-grade Linux on Enterprise Foundations Operating System - a complete Linux distribution for IBM Z mainframes that tracks CentOS on Intel systems

Products and services

• OpenAFS Consulting, Development, Support, and Training Professional services package around OpenAFS — a federated file sharing system with single-namespace, multi-platform client-server architecture and location-independent, transparent migration capabilities — for government agencies, multinational corporations, and academic institutions running mission-critical infrastructure.
• ClefOS for IBM Z ClefOS (Commercial-grade Linux on Enterprise Foundations Operating System) is a complete Linux distribution that tracks CentOS on Intel systems, available royalty and license free for IBM Z/mainframe systems, permitting commercial software certified for RHEL to run.
• AlmaLinux for s390x A CentOS alternative Linux distribution ported by Sine Nomine Associates to IBM Z (s390x architecture), enabling organizations to run enterprise workloads on mainframe Linux.
• FABS (Flexible AFS Backup System) A suite of tools and daemons for managing backups for an AFS cell, acting as a bridge between AFS and existing plain-file backup systems regardless of backup software, with commercial support from Sine Nomine Associates.
• SSH Client Suite for z/VSE and VSE SSH v2, SCP, and SFTP utilities for z/VSE and VSE systems providing encrypted file transfer and terminal sessions to hosts supporting SSH, SCP, and SFTP protocols, developed in partnership with Barnard Software Inc.
• Mono/.NET Services for Linux on Mainframe Consulting and integration services enabling Microsoft .NET applications to run on Linux under IBM mainframes through Mono/.NET support.
• MongoDB on Mainframe Services MongoDB database deployment and automation services for Linux on IBM Z/mainframe systems, enabling organizations to run MongoDB workloads on enterprise mainframe infrastructure.
• Docker and OpenShift Services for Mainframe Container technology consulting and implementation services for Docker and OpenShift deployment on IBM mainframe systems.
• z/VM Application Support Technical support and consulting services for the IBM z/VM operating system on IBM z servers, providing application-level troubleshooting and maintenance.
• NJE/IP for IBM Z Network Job Entry over IP connectivity for IBM Z systems, providing mainframe-to-network job entry capabilities.
• HAO for System z High Availability software for IBM System z infrastructure, providing continuity and resilience for Linux-on-mainframe deployments.
• Spark Container for Linux on System z Apache Spark container deployment for Linux on IBM System z mainframe, available via ClefOS 7 dockerfile for analytics workloads on mainframe.
• LinuxONE Services Consulting and support services for Linux deployments on IBM LinuxONE systems, enabling organizations to leverage mainframe Linux environments.
• Data Center Consulting Enterprise data center consulting services covering design, implementation, and modernization engagements.
• Part-Time CTO Consulting Executive technology leadership consulting services providing part-time CTO-level guidance for organizations requiring senior technology strategy.
• Custom Open-Source Development and Support Custom-tailored offerings for open-source solutions including feature development, improvement, and ongoing support for customers wishing to add or improve functionality in their open-source deployments.

Named customers3 records

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Three partnerships are on record, tiered minor and core.

• Barnard Software Inc.minorStrategic or Co-development Partner · 19 July 2023Partnership to develop and deliver SSH v2, SCP and SFTP utilities for z/VSE and VSE systems. The commands provide encrypted file transfer and terminal sessions from VSE to other hosts supporting SSH, SCP and SFTP protocols.
• Open Mainframe Project (Linux Foundation)coreTechnology or Integration · 24 December 2016Joined as member to advance Linux on mainframe computing. Part of Linux Foundation collaboration designed to help open source on big iron enterprise systems.
• IBMcoreTechnology or IntegrationLong-standing relationship with IBM for Linux on mainframe development, Open Source on System z, and mainframe modernization initiatives. Company pioneered virtual server farm concept using Linux on IBM mainframe.

Scale indicators2 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Red Hat (IBM): The dominant enterprise Linux distributor for IBM Z including RHEL, OpenShift, and Ansible. Directly comparable to Sine Nomine's Linux-on-IBM Z, ClefOS, Docker/OpenShift consulting, and AlmaLinux offerings, though Red Hat operates at vastly greater scale and portfolio breadth.
• Precisely: Large vendor of data integrity, integration, and mainframe-to-modern data tools. Comparable to Sine Nomine in serving enterprise mainframe customers with adjacent data infrastructure tooling, but Precisely operates at enterprise scale across a broader portfolio.
• Rocket Software: Large independent vendor of mainframe infrastructure software including terminal emulation, data, and z/OS tooling. Comparable to Sine Nomine in target market (IBM Z operators) and adjacent in product category, but operates at much greater scale and product breadth.
• BMC Software: Large enterprise software vendor with deep mainframe portfolio across z/OS, data, and IT operations management. Overlaps with Sine Nomine's mainframe operations, data center consulting, and enterprise IT services target market, but at vastly greater scale and broader solution set.
• SUSE: Enterprise Linux distributor that historically partnered with Sine Nomine (SUSE Linux Enterprise Server Starter System for System z) and continues to target IBM Z. Directly comparable in the Linux-on-mainframe space where Sine Nomine's ClefOS competes, but SUSE is far larger and broader.

Direct peers

• Astadia: Consulting and managed services firm specializing in mainframe modernization, cloud migration, and DevOps for legacy estates. Comparable to Sine Nomine in the mainframe consulting and modernization services business model and target customer (Fortune 500 mainframe shops).
• Fundamental Software: Independent vendor focused on VSE and z/VSE tools, security, and modernization. Fundamental Software operates in essentially the same niche as Sine Nomine's z/VSE and VSE utilities (e.g., SSH Client Suite) with overlapping customers and product categories.
• Phoenix Software International: Independent vendor of z/VM and z/VSE system software, tools, and utilities. Phoenix Software overlaps directly with Sine Nomine's IBM z/VM and z/VSE consulting, support, and tools offerings, serving the same mainframe customer set with comparable niche products.
• Velocity Software: Long-standing niche vendor specializing in z/VM, VM/ESA, and VSE software tools and utilities. Velocity Software is highly comparable to Sine Nomine's z/VM application support and CMS tools business, both targeting the same shrinking but loyal mainframe install base.

Emerging players

• Rogue Wave Software (OpenText): Historical provider of open-source software support, developer tools, and embedded analytics, now part of OpenText. Comparable to Sine Nomine's commercial open-source support and subscription model (e.g., OpenAFS support contracts), targeting enterprise buyers of open-source components.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/sna_usa
• YouTubeyoutube.com/@sinenomineassociatesinc.8264
• Facebookfacebook.com/profile.php?id=100057334154795
• LinkedInlinkedin.com/company/sine-nomine-associates

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sine Nomine Associates