Overview

Timberline Manufacturing is a 100% employee-owned electrical contract manufacturer headquartered in Marion, Iowa, founded in 1993. It produces wire harness assemblies, control panels, and circuit board assemblies, and serves automotive, electric-vehicle, electronics, appliance, construction, and military-defense customers. The company employs an estimated 200 to 500 people. In 2026 it announced a planned retirement and succession for CEO Pientok.

At a glance

What Timberline Manufacturing makes

The company holds AS9100, ISO 9001, and ITAR registration, and lists wire harness, PCB, and electronics assembly among its products.

Products and capabilities described on the company's own site include Welding, Assembly, Wire Harness, Electronics, PCB (source: timberlinemfg.com).

Certifications

Timberline Manufacturing is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:

• AS9100 — timberlinemfg.com

• ISO 9001 — timberlinemfg.com

• ITAR registered — timberlinemfg.com

Latest developments

• 2026-09-11 — Timberline announces retirement, succession plans for CEO Pientok (corridorbusiness.com)

• 2026-06-23 — Director of Programs, Sales and Marketing Job in Marion, IA at Timberline Manufacturing (mediabistro.com)

• 2026-02-11 — We’re honored to be nominated for Company of the Year in the IA/NE Chapter! 🎉 | Timberline Manufacturing (linkedin.com)

• 2025-06-03 — Timberline Manufacturing Archives - Corridor Business Journal (corridorbusiness.com)

• 2025-05-22 — 📢 Exciting Opportunity! 📢 Timberline Manufacturing is searching for a dynamic Chief Financial Officer (CFO) to join our leadership team! | Timberline Manufacturing (linkedin.com)

• 2025-03-28 — Marion-based Timberline Manufacturing Announces New CEO | The Gazette (thegazette.com)

Facilities

Timberline Manufacturing is headquartered in Marion, Iowa. Public sources also reference these locations:

• Marion, Iowa — timberlinemfg.com

Company details

The company is privately held and employee-owned, with an estimated revenue band of $10 to 50 million. Timberline Manufacturing was founded in 1993, has an estimated 200-500 employees, and is headquartered in Marion, Iowa. On the LightSource stability read it is rated "Established & active": 33 years in operation (founded 1993). Holds AS9100, ISO 9001, ITAR registered certification(s) per public sources.

Frequently asked questions

What does Timberline Manufacturing make?

Timberline Manufacturing is a 100% employee-owned electrical contract manufacturer headquartered in Marion, Iowa, founded in 1993. It produces wire harness assemblies, control panels, and circuit board assemblies, and serves automotive, electric-vehicle, electronics, appliance, construction, and military-defense customers. The company employs an estimated 200 to 500 people. In 2026 it announced a planned retirement and succession for CEO Pientok.

Where is Timberline Manufacturing headquartered?

Timberline Manufacturing is headquartered in Marion, Iowa (1029 Blairs Ferry Rd, Marion, Iowa, 52302).

When was Timberline Manufacturing founded?

Timberline Manufacturing was founded in 1993.

How big is Timberline Manufacturing?

Timberline Manufacturing has an estimated 200-500 employees, with revenue in the $10-50M range (estimated).

What certifications does Timberline Manufacturing hold?

Timberline Manufacturing lists AS9100 · ISO 9001 · ITAR registered on its website. Confirm the certified scope for the specific plant producing your part.

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Last verified Nov 2026. Is this your company? Request a correction.