Don MacWilliam, SIOR
Vice Chair, Colliers. Southwest Valley industrial specialist who has worked Phoenix distribution sales and leasing since 1986.
Last verified: 2026-10-20
Not ranked. See how we verify.
Identity
| Current firm | Colliers: firm bio page (checked 2026-10-20) |
| Title | Vice Chair (as the firm states it) |
| Office | 2390 E. Camelback Road, Suite 100, Phoenix, AZ 85016 (Colliers Arizona) |
| License | Arizona Department of Real Estate: license SA032128000, the number on his Colliers bio, status Active, employer Colliers International AZ LLC. |
| Specialty | Industrial leasing and sales |
Evidence
Tier A is an independent record, B is a firm or deal-party publication, and C is self-reported. Each row links to the page we read.
| Tier | What the source shows | Source | Checked |
|---|---|---|---|
| A | CoStar Power Broker Awards list him among Phoenix’s Top Industrial Leasing Brokers in 2025. | CoStar Power Broker Awards, Phoenix annual winners, 2025 | |
| A | SIOR directory lists Don MacWilliam, Industrial Specialist, at Colliers in Phoenix. | SIOR directory listing: Don MacWilliam, Colliers | |
| A | Arizona Department of Real Estate: license SA032128000, the number on his Colliers bio, status Active, employer Colliers International AZ LLC. | Arizona Department of Real Estate, individual license search Colliers bio: Don MacWilliam | |
| B | Colliers news (Sept 6, 2024): MacWilliam, Payson MacWilliam and Chris Reese represented landlord Pasternack Properties as International Paper leased 113,528 sq ft at 6150 W. Buckeye Road, bringing the three-building project to full occupancy. | Colliers news: International Paper brings Estrella Commerce Center II to full occupancy (Sept 6, 2024) | |
| C Self-reported | Ten-time Colliers Everest Club honoree, and a team that added more than 6 million sq ft of user build-to-suits and over 15 million sq ft of speculative space to the Southwest Valley. Self-reported in his Colliers bio. | Colliers bio: Don MacWilliam |
What we could not verify
- His bio lists CoStar Power Broker awards for 2012 to 2024. CoStar’s Phoenix annual lists for 2018 to 2024 do not include him; we confirmed 2025 only.
Related
Colliers firm profile · Phoenix brokerage hub · Other brokers in Phoenix: none yet · All broker profiles
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Last verified 2026-10-20. Figures were re-read from the linked sources that day.
View changelog
- Profile published with tiered, dated evidence.
Sources
- CoStar Power Broker Awards, Phoenix annual winners, 2025 · accessed 2026-10-20
- SIOR directory listing: Don MacWilliam, Colliers · accessed 2026-10-20
- Arizona Department of Real Estate, individual license search · accessed 2026-10-20
- Colliers bio: Don MacWilliam · accessed 2026-10-20
- Colliers news: International Paper brings Estrella Commerce Center II to full occupancy (Sept 6, 2024) · accessed 2026-10-20