Centerline Tactical

Meet The Team

The operators behind Centerline Tactical. Real experience. Real credentials. Real results.

Adam Seegmiller

Adam Seegmiller

Creator of HAVOC • Tier 1 Special Operations Veteran

When Adam was a young man, his girlfriend's ex cornered him outside a trailer on a gravel driveway. He had years of taekwondo. Brown belt. Competed at state level. None of it mattered. He was pinned with no room to kick, standing on gravel where footwork meant falling on his face.

That fear never left him. So he spent the next 25 years making sure it would never happen again.

He worked the door at the roughest bar in town on purpose... a place full of drug dealers and criminals. Two to three fights a night, Thursday through Saturday, for two years straight. Hundreds of real fights. His first night, a woman's boyfriend was beating her and Adam stepped in. She smashed a beer bottle on his face. The boyfriend beat the shit out of him. His girlfriend asked how long he'd keep doing this. He said, "Until my knees stop shaking."

He joined the military. Made it to a Tier 1 special operations unit where he ran the fight team. Spent time at Blackwater. Trained with UFC champions including Michael Bisping. Spent 5 cumulative years in active combat zones. Did close protection work, often without a weapon.

Every step was the same filter: does it work when you're terrified, exhausted, and surprised? If not, it got cut. What survived became HAVOC.

  • 24 years military service, retired Sergeant Major
  • Tier 1 special operations fight team
  • Close protection in active combat zones
  • Hundreds of real street fights
  • Trained alongside Navy SEALs, Delta Force, SAS, SASR
  • Blackwater-certified close protection operator
  • Sparred with UFC champions
  • iPREP Performance Resilience Instructor
"The genius is in the simplicity. If it's complex, you're not going to do it when someone's trying to kill you."

Andrew MacDonald

HAVOC Co-Instructor • BJJ Expert

Andrew brings over 20 years of training and competition to the HAVOC program. As a 3rd Degree Black Belt in Brazilian Jiu-Jitsu, he's tested every technique against skilled, resisting opponents at the highest levels of international competition.

His role in HAVOC is critical: he's the training partner who pressure-tests every technique Adam teaches. When you see a demonstration in the course, Andrew isn't just going along with it... he's actively resisting, proving that the technique works against someone who knows exactly what's coming.

Together, Adam and Andrew bridge the gap between real-world violence survival and technical martial arts expertise... giving you a system that's both battle-tested and technically sound.

  • 3rd Degree Black Belt in Brazilian Jiu-Jitsu
  • 20+ years of training and competition
  • Medaled at AGP Rome Grand Slam
  • IBJJF Asia Open competitor
  • Refined every HAVOC technique against skilled resistance
  • Expertise in ground fighting and submission defense
"Would you say the ground is where you want to go all the time? Absolutely not."
Andrew MacDonald

Train With The Best

Learn directly from operators who've been there. Not theorists. Not sport fighters. The real thing.

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