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Find an individual member using the form below or using our Member Map. To select among specialty types please see the definitions of each type below and choose accordingly.

SIOR Designee

Representing the elite top 1% of commercial real estate professionals, SIOR designees are recognized for their exceptional production, experience, and commitment to the highest standards of ethics and excellence. Designees specialize in industrial, office, sales management, executive management, and advisory services.

Member Associate

Commercial real estate professionals with 1–8 years of industry experience who are building their careers and working toward earning the prestigious SIOR designation through education, mentorship, and networking opportunities.

Affiliate Member

Companies providing products and services to the commercial real estate industry seeking to build relationships, increase visibility, and connect with SIOR’s elite global network of professionals. You may also use the following link to search our Affiliate Members.

Mr. Matt Dierckman

Executive Vice President

COLLIERS

SIOR

SIOR Member since 2021

505 N Brand Blvd Ste 1120, Glendale, California 91203-3945

Active Committees (0)

No active committees on record.

Past Committees (0)

No past committees on record.

Events Attended This Year (1)
  • 2026 Spring EventApr 14, 2026
Lifetime Events Attended (5)
  • 2026 Spring EventApr 14, 2026
  • 2025 Spring EventMay 6, 2025
  • 2024 Fall EventOct 15, 2024
  • Golf Tournament 07/19/2021Jul 19, 2021
  • 2022 TransACT 360Apr 29, 2020
Transactions (6)
John DeGrinis, SIOR
NEWMARK
Calabasas, CA
Patrick DuRoss, SIOR
NEWMARK
Calabasas, CA
Jeff Abraham, SIOR
NEWMARK
Calabasas, CA
Matt Dierckman, SIOR
COLLIERS
Glendale, CA
David Harding, SIOR
COLLIERS
Glendale, CA
INDUSTRIAL LEASE
$13,586,647
113,400 Sq. Ft.
June 4, 2026 Valencia, CA
Patrick DuRoss, SIOR
NEWMARK
Calabasas, CA
Matt Dierckman, SIOR
COLLIERS
Glendale, CA
David Harding, SIOR
COLLIERS
Glendale, CA
John DeGrinis, SIOR
NEWMARK
Calabasas, CA
Jeff Abraham, SIOR
NEWMARK
Calabasas, CA
INDUSTRIAL LEASE
$1,898,308
15,547 Sq. Ft.
June 12, 2024 Los Angeles, CA
Patrick DuRoss, SIOR
NEWMARK
Calabasas, CA
David Harding, SIOR
COLLIERS
Glendale, CA
Matt Dierckman, SIOR
COLLIERS
Glendale, CA
John DeGrinis, SIOR
NEWMARK
Calabasas, CA
Jeff Abraham, SIOR
NEWMARK
Calabasas, CA
INDUSTRIAL LEASE
$15,505,571
55,715 Sq. Ft.
May 28, 2024 San Fernando, CA
Patrick DuRoss, SIOR
NEWMARK
Calabasas, CA
John DeGrinis, SIOR
NEWMARK
Calabasas, CA
Jeff Abraham, SIOR
NEWMARK
Calabasas, CA
Matt Dierckman, SIOR
COLLIERS
Glendale, CA
INDUSTRIAL LEASE
$5,721,804
64,732 Sq. Ft.
April 18, 2024 Valencia, CA
Patrick DuRoss, SIOR
NEWMARK
Calabasas, CA
John DeGrinis, SIOR
NEWMARK
Calabasas, CA
Jeff Abraham, SIOR
NEWMARK
Calabasas, CA
David Harding, SIOR
COLLIERS
Glendale, CA
Matt Dierckman, SIOR
COLLIERS
Glendale, CA
INDUSTRIAL LEASE
$2,625,326
53,756 Sq. Ft.
October 20, 2022 Moorpark, CA
Patrick DuRoss, SIOR
NEWMARK
Calabasas, CA
David Harding, SIOR
COLLIERS
Glendale, CA
Matt Dierckman, SIOR
COLLIERS
Glendale, CA
Jeff Abraham, SIOR
NEWMARK
Calabasas, CA
John DeGrinis, SIOR
NEWMARK
Calabasas, CA
INDUSTRIAL LEASE
$5,130,742
52,716 Sq. Ft.
August 1, 2021 Burbank, CA
Klabin
Bridge