Menu

About the OBOA

We are guardians of a better built Ontario.

Not a member yet? Join now

OAA Invalidation

Invalidated as of Name Seal No.
2019-10-06 Rolf Seifert 8537
2016-02-01 Allan Barrett 3955
2020-01-08 Mahdieh Haji-Ghassemi 8538
2020-01-02 Amer Jordan 8940
2019-12-05 Amanda Elliott 8895
2020-10-10 Sameh Aly 9058
2021-01-05 Robert J. Crothers 3950
2020-12-18 Robert E. Lorimer 3778
2021-10-25 Mohsen Salar Karimi 9382
2021-11-01 Ryan Odell 7730
2021-12-31 Medhat Abdou 2318
2022-02-24 Colin Rabnett 3119
2022-04-16 Yuk-Cheung Lee 7900
2021-11-15 Julian J. Trasiewicz 1995
2021-11-19 Stephen R. Pile 3199
2022-02-28 Alexander V. Talwood 4512
2022-03-20 Ruriko Numazawa 7842
2021-10-07 Charles R. Schwenger 2997
2021-08-05 Armstrong, Kristen Leigh 8358
2020-06-04 Baird, George P. 1863
2021-05-10 Bohlin, Peter Quarfordt 6612
2019-12-31 Clark, Michael Lambert 6561
2020-04-20 Connolly, Eric Arthur 3399
2020-07-01 Dejmek, Ludmila 2542
2020-07-14 Fournier, Jean Carol 7333
2020-12-31 Gittings, John 4794
2020-08-10 Haley, Gillian B. 4366
2020-03-19 Jin, Bernard 7153
2020-12-31 Kougias, Susan Nelson 8660
2020-06-02 Krapez, Mark 4906
2021-08-05 McLeish, James Black III 8920
2021-12-31 Miller, J. David 4451
2020-12-23 Moore, David P. 3674
2020-12-31 Nestor, Miro J. 2639
2021-08-05 Ouimette, Denis R. 8088
2020-03-30 Padolsky, Barry Leonard 1911
2021-08-05 Reim, Ronald Melvin 6318
2020-02-27 Segarra, Robert 3649
2020-04-06 Simon, Charles H. 2269
2020-12-31 Trites, Ian 4716
2020-05-11 Vlattas, Nicholas E. 8086
2020-05-21 Yeung, David P.C. 3976
2020-06-18 Young, David Allen 6585
2021-08-05 Reynolds, Michael Everett 7348
2022-10-18 Clinckett, John 2946
2022-10-18 Murphy, David Ronald 9201
2023-03-17 Robert Earl Miller 7121
2023-03-17 Ronald Bean 4727
2023-03-17 Mark Tyson Rosen 6842
2023-03-17 Jun Gu 8966
2023-03-17 Andrea Maxine Katz 7184
2022-12-17 Robert E. Podreciks 4452
2023-08-25 Carson Liang 3320
2023-08-25 Mark W. Hall 4383
2023-08-25 Peter Hillermann 8707
2023-08-25 Nicholas Banks Herder 9229
2023-08-25 Guy Favreau 6733
2023-08-25 Nolan A. Natale 3667
2023-08-25 William Herbert Foley 9233

add seal