What Precision Systems does

Precision Systems, Inc. (doing business as PSI Software) is a privately held, woman-owned C Corporation founded in 1979 and headquartered in Horsham, Pennsylvania. The firm specializes in custom software design, development, and maintenance for mission- and safety-critical systems, spanning embedded and real-time software, web, cloud, desktop (Linux/Windows), and mobile platforms, with deep coverage of industrial protocols such as PROFINET, PROFIBUS, MODBUS, FOUNDATION FIELDBUS, HART, CAN, and OPC/UA. Its delivery model rests on a proprietary five-stage development process (Concept & Research, Planning, Development, Testing, Maintenance & Support) executed by a 100% US-based engineering team, and is governed by an ISO-certified Quality Management System covering ISO 9001:2015, ISO 13485:2016, and ISO 27001:2022, audited annually by Dekra.

The company serves three core verticals: medical device manufacturers (supporting FDA 510(k), De Novo, and PMA pathways under IEC 62304/14971/60601 and 21 CFR Parts 11 and 820), industrial automation firms requiring IEC 61508 SIL-rated and IEC 62443 cybersecurity-compliant control software, and US Government/defense customers requiring MIL-SPEC/MIL-STD compliant systems, where PSI has operated as a prime and sub-contractor since 2000. Named enterprise clients include Lockheed Martin, Honeywell, Abbott, Merck, B. Braun, Siemens, ABB, Janssen, DePuy Synthes, and the US Army Applied Technology Directorate. Service offerings include new software design and development, legacy software updates and enhancements, full software engineering services, consultative services, and a productized FDA Software Readiness Evaluation tool.

Commercially, PSI operates as a B2B professional services firm selling project-based engagements via direct enterprise sales and consultative engagement through website contact channels, with no resellers or self-service distribution. Pricing is quote-based and not publicly disclosed, with project tiers ranging from approximately $15,000 for small assessments up to $1,000,000+ for complex, regulated mission-critical systems. Revenue is not publicly disclosed, and the firm has no external institutional funding, operating as a bootstrapped, family-led small business under founder Walter P. Johnson as CEO & President, with Jordan Scott as CTO, Jeremy Reimert as Director of Operations, Peter Eisenhower as VP of Software Engineering, and Brianna Tulskie as Controller.

Name

Precision Systems

Legal name

Precision Systems, Inc.

Website

https://psi-software.com

Company type

Private

Founded year

1979

Operating status

Operating

Headcount range

101–250 employees

Short description

Precision Systems (PSI Software) is a privately held, US-based custom software development firm founded in 1979, specializing in mission- and safety-critical embedded, web, cloud, and mobile software for medical device, industrial automation, and government/defense clients under ISO-certified quality and regulatory compliance frameworks.

Ownership category

akta.pro rank

Product category

Custom Embedded Software Development Services

NAICS

Computer Systems Design Services (541512)

SIC

Services-Computer Integrated Systems Design (7373)

akta.pro primary industry

Process & Batch Control Software (Recipe Management, ISA-88) (IMAGABAH)

akta.pro secondary industries

Safety Instrumented Systems & Machine Safety Control (SIS, Safety PLCs, Relays) (IMAGABAF), Avionics Software, Certification & Safety-Critical Systems (DO-178/DO-254) (IMABAFAK)

Keywords

• Custom software development
• Embedded systems engineering
• Medical device software
• Industrial automation software
• Defense software engineering

Headquarters

HQ city

Horsham

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Custom Software Development Services: Project-based professional services for design, development, testing, and maintenance of mission-critical software systems. Pricing is quote-based and determined by project scope, complexity, and regulatory requirements. Budget tiers range from $15k-$50k to $1M+ based on project scale.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Precision Systems provides end-to-end custom software design and development services for embedded and real-time systems, web, cloud, and mobile applications, targeted at highly regulated industries including medical devices, industrial automation, and government/defense. Its offering encompasses the full software development lifecycle — from regulatory consulting and FDA readiness assessments through legacy modernization, engineering, testing, and long-term maintenance — with project-based engagements scaled to meet FDA, IEC, SIL, and MIL-SPEC compliance requirements.

Product overview

Precision Systems (PSI Software) is a custom embedded software development firm founded in 1979, offering a portfolio of services rather than a single product. The core offerings include Custom Software Design & Development and Legacy Software Updates & Enhancements, supported by specialized Software Engineering Services, Consultative Services, and Platform Expertise spanning embedded/real-time systems, web/cloud, desktop, and mobile. Additionally, they provide an FDA Software Readiness Evaluation tool for medical device regulatory assessment. All services are tailored for mission- and safety-critical applications in medical (FDA-regulated devices), industrial (automation and control), and government/military sectors, with deep expertise in regulatory compliance including ISO 13485, IEC 62304, SIL standards, and MIL-SPEC requirements.

Differentiator

Problem solved

Functional benefit

Products and services

• Custom Software Design & Development End-to-end custom software development services for embedded and real-time systems, web, cloud, and mobile applications, tailored for highly regulated industries including medical, industrial, and government sectors.
• Legacy Software Updates & Enhancements Modernization and optimization services for legacy systems, including code refactoring, software upgrades, and system enhancements to improve functionality, security, and compliance without disrupting operations.
• FDA Software Readiness Evaluation A structured, question-by-question assessment tool that evaluates software readiness for FDA submission, covering regulatory, lifecycle, risk, validation, and submission readiness dimensions for medical device software.
• Software Engineering Services Full software development lifecycle services encompassing project planning, requirements and design, development and integration, testing and verification, and maintenance and support for regulated-industry clients.
• Consultative Services Expert guidance on regulatory requirements, risk management, gap assessments, code audits, integration planning, and documentation for regulatory submissions in medical, industrial, and defense software programs.
• Platform Expertise Full-stack engineering expertise across embedded and real-time systems, web and cloud (primarily AWS), desktop (Linux and Windows), and mobile (Android and iOS) platforms, with deep knowledge of industrial communication protocols including PROFINET, PROFIBUS, MODBUS, FOUNDATION FIELDBUS, HART, WirelessHART, CAN, OPC/UA, DEVICENET, Industrial Ethernet, HMI, DNP, and DNP3.

Quantifiable outcome

• 100% FDA Success Rate - Every medical device developed with PSI's software expertise has passed FDA approval on first regulatory submission
• +2 more outcomes

Named customers16 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature3 records

Partnerships

Two partnerships are on record, tiered core.

• IEC (International Electrotechnical Commission)coreOthersPSI adheres to multiple IEC standards including IEC 62304 (medical device software), IEC 82304, IEC 14971 (risk management), IEC 60601 (medical electrical equipment), and IEC 61508 (functional safety). These are foundational compliance frameworks for the company's regulated industry work.
• FDA (Food and Drug Administration)coreOthersPSI develops software in compliance with FDA regulations including 21 CFR Part 820 (Quality System Regulation) and 21 CFR Part 11 (Electronic Records). The company supports clients through regulatory submissions including 510(k), De Novo, and PMA pathways.

Scale indicators4 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• DornerWorks: US-based embedded software engineering firm specializing in medical device, industrial, and aerospace/defense software with FDA, IEC 62304, and DO-178 expertise — directly comparable to PSI's safety-critical embedded services model.
• Piterion: Embedded software services company serving medical, industrial, and automotive clients with safety-critical development, closely matching PSI's regulated-industry embedded and real-time systems work.
• einfochips (Arrow Electronics): Embedded product engineering services firm with deep medical device, industrial, and aerospace exposure — comparable custom safety-critical software delivery model and regulatory depth.

Broad incumbents

• LTIMindtree: Global IT and engineering services firm with a regulated-industry practice in healthcare, life sciences, and manufacturing — competes for similar enterprise custom software programs.
• Cyient: Global engineering services firm serving aerospace, defense, and medical device OEMs with embedded software, digital, and design services — a much larger incumbent operating in PSI's exact verticals.
• Quest Global: Large engineering services provider covering aerospace, defense, medical devices, and industrial — comparable vertical mix and full-lifecycle embedded software capabilities.
• Capgemini Engineering: Global R&D and engineering services arm of Capgemini (formerly Altran/Aricent) covering aerospace, defense, automotive, and medical — overlaps with PSI's full-lifecycle safety-critical software work at much greater scale.
• GlobalLogic (Hitachi): Large-scale digital product engineering and software services firm serving medical, industrial, and communications clients — overlaps with PSI's full-stack embedded-to-cloud capability.
• Tata Elxsi: Design and technology services company specializing in medical devices, automotive, and industrial — directly comparable regulated embedded and software-defined product engineering.

Regional players

• ALTEN: European-headquartered engineering and IT services group with strong automotive, aerospace, and industrial embedded software practices — comparable in delivery model though primarily non-US in footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/psisoftware
• Xx.com/psi_software

Compliance14 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 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 Precision Systems