O CONNELL, WILLIAM E

Minnesota (Grand Forks) - Plumbing - Master Plumber
Expired

OAKS, KENNETH B

Minnesota (Nisswa) - Plumbing - Master Plumber
Issued

OBERG, SCOTT C

Minnesota - Plumbing - Master Plumber
Issued

OBERLOH, DARREL D

Minnesota (Fulda) - Plumbing - Master Plumber
Issued

OBERMUELLER, KENDALL G

Minnesota (Minong) - Plumbing - Master Plumber
Issued

OBRIEN, MICHAEL F

Minnesota (Le Sueur) - Plumbing - Master Plumber
Issued

OBRIEN, FRANCIS

Minnesota (Le Sueur) - Plumbing - Master Plumber
Expired

OBRIEN, JAMES D

Minnesota - Plumbing - Master Plumber
Issued

OCONNELL, JASON J

Minnesota - Plumbing - Master Plumber
Issued

OCONNOR, MICHAEL J

Minnesota (Austin) - Plumbing - Master Plumber
Issued

OCONNOR, MICHAEL J

Minnesota (Austin) - Plumbing - Master Plumber
Issued

OEFFLING, COREY J

Minnesota (Hanover) - Plumbing - Master Plumber
Issued

OELSCHLAGER, HARLEY A

Minnesota - Plumbing - Master Plumber
Issued

OEN, MICHAEL R

Minnesota - Plumbing - Master Plumber
Issued

OFTEDAHL, DAVID L

Minnesota (Rochester) - Plumbing - Master Plumber
Issued

OGAARD, CODY E

Minnesota (West Fargo) - Plumbing - Master Plumber
Issued

OGDEN, DWAINE L

Minnesota (Bemidji) - Plumbing - Master Plumber
Issued

OGILVIE, TREVOR J

Minnesota (Prescott) - Plumbing - Master Plumber
Issued

OGREN, MARTY C

Minnesota (Hutchinson) - Plumbing - Master Plumber
Issued

OHMANN, MARK R

Minnesota (Newport) - Plumbing - Master Plumber
Issued