A & A Drilling Service INC
Boiler/Steam Fit/Proc Piping · Based in Portland, OR · Licensed in Washington · License #AADRISI077QB
A & A Drilling Service INC has been registered with WA L&I since 1993, based in Portland, OR. Current filings: $15,000 surety bond (continuous) and $1,000,000 liability coverage through Nov 9, 2027. A surety bond has been on file since 2019.
How confident can you be in A & A Drilling Service INC?
Are they licensed, bonded, and insured?
Active license, $15,000 bond and $1,000,000 liability on file — checked against WA L&I records, updated daily.
Are they who they say they are?
Not yet verified — A & A Drilling Service INC hasn't claimed this listing. Own this business? Claim it free.
Do other pros stand behind them?
No endorsements yet from other licensed contractors in Portland.
Do they have jobs on record?
Not yet measured — A & A Drilling Service INC hasn't run jobs through Subser. Performance data comes from real jobs, not reviews.
Subser doesn't do star ratings or reviews — just verified records. What do these mean?
License facts
- License type
- CONSTRUCTION CONTRACTOR
- Effective date
- Nov 2, 1993
- Expiration date
- May 13, 2028
- UBI
- 600315263
- Business type
- Corporation
- Phone
- (503) 659-8583
- Location
- Portland, OR 97268
Source: WA L&I contractor registration — checked Nov 12, 2026. Applies to every row above.
Registration is current through May 2028.
Is this your business? Claim it free to verify ownership — takes about two minutes.
Claim this free listingBond & insurance on file
| Bond firm | Amount | Effective | Expiration |
|---|---|---|---|
| Ohio Cas Ins Co | $15,000 | Jul 1, 2024 | Continuous — until canceled |
| Ohio Cas Ins Co | $6,000 | Apr 1, 2024 | Jul 1, 2024 |
| Ohio Cas Ins Co | $6,000 | Aug 26, 2019 | Apr 1, 2024 |
| Insurance company | Amount | Agency | Effective | Expiration |
|---|---|---|---|---|
| WESTERN NATIONAL MUTUAL INS CO | $1,000,000 | ANCHOR INSURANCE & SURETY INC | Nov 9, 2026 | Nov 9, 2027 |
What the bond and insurance requirements mean for homeowners
Registration as a specialty contractor in Washington requires a $15,000 surety bond on file with the Department of Labor & Industries; the general contractor requirement is $30,000. This contractor's current filing shows a $15,000 bond.
The bond is a limited fund a homeowner (or subcontractor or supplier) can make a claim against, through the courts, if a registered contractor fails to meet its obligations on a job. Contractors must also keep general liability insurance on file — at least $50,000 in property damage and $200,000 in public liability coverage, or a $250,000 combined single limit — which covers damage the contractor causes, not workmanship disputes. The rows above are the bond and insurance filings L&I publishes for this registration; whether a specific filing applies to a specific project depends on its dates and terms.
Principals
| Name | Start date |
|---|---|
| Derek Bjorn Osterholme | Apr 11, 2024 |
| Robin Ruth Tigli | Nov 12, 2013 |
| Anthony Loren Tigli | Nov 12, 2013 |
| Warren E Anderson Jr | Jan 1, 1980 |
| Robin R Tigli | Jan 1, 1980 |
What is a Boiler/Steam Fit/Proc Piping contractor licensed to do in Washington?
Boiler and steam fitting contractors install and repair boilers, steam and hydronic heating systems, and process piping. Typical projects include boiler replacement, radiator and piping repair, and industrial process pipe installation. A $15,000 surety bond and general liability insurance, filed with WA L&I, are required for this registration.
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Subser doesn't have reviews or star ratings. This page shows A & A Drilling Service INC's WA L&I record — registration status, bond and liability coverage, and principals on file — plus any endorsements from other licensed contractors.
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Built from Washington State L&I public records, updated Nov 12, 2026. Subser doesn't do star ratings or reviews — just verified records.